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- `zig build fuzz` builds only the fuzz tests listed in `tests/fuzz/targets.json`. `-Dfuzz-target=<name>` picks one target, and `--fuzz=N` searches for new failing inputs. - `zig build test` replays each target's saved inputs from `tests/fuzz/corpus/<target>/` on every pull request. - A nightly Fuzz workflow fuzzes every target for about 20 minutes, uploads any failing input, and opens or updates an issue for that target. A pull request that changes the fuzzing setup fuzzes each target for two minutes. - The shell parity tests run every command form fx runs without review through sh, dash, bash, and zsh, with and without `extendedglob`, and check that each one runs exactly as fx parsed it. The `shell_parity` target checks generated commands the same way.
109 lines
3.2 KiB
YAML
109 lines
3.2 KiB
YAML
name: Fuzz
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# Nightly coverage-guided fuzzing. Each target in tests/fuzz/targets.json gets
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# its own job and about 20 minutes of fuzzing. A failure uploads the recovered
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# input and opens or updates the target's issue, titled
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# "Nightly fuzz failure: <target>". scripts/fuzz_nightly.py does the work.
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# A pull request that changes the fuzzing setup fuzzes every target for two
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# minutes, so a change that breaks the nightly run fails before it merges.
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on:
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schedule:
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- cron: "23 7 * * *"
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pull_request:
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paths:
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- .github/workflows/fuzz.yml
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- scripts/fuzz_nightly.py
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- src/fuzz_targets.zig
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- tests/fuzz/**
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workflow_dispatch:
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inputs:
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target:
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description: Fuzz only this target (leave empty for every target)
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type: string
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default: ""
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permissions:
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contents: read
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concurrency:
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group: fuzz-${{ github.ref }}
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cancel-in-progress: ${{ github.event_name == 'pull_request' }}
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jobs:
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targets:
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name: List fuzz targets
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runs-on: ubuntu-latest
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outputs:
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targets: ${{ steps.list.outputs.targets }}
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steps:
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- uses: actions/checkout@v4
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- name: List targets
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id: list
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env:
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ONLY: ${{ inputs.target }}
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run: python3 -m scripts.fuzz_nightly matrix --only "$ONLY" >> "$GITHUB_OUTPUT"
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fuzz:
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name: Fuzz ${{ matrix.target }}
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needs: targets
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runs-on: ubuntu-latest
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timeout-minutes: 45
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permissions:
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contents: read
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issues: write
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strategy:
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fail-fast: false
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matrix:
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target: ${{ fromJSON(needs.targets.outputs.targets) }}
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steps:
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- uses: actions/checkout@v4
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# Restores main's unit-test cache for the dependencies, compiler_rt, and
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# libc it keeps. This job never saves a cache.
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- name: Setup Zig
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uses: ./.github/actions/setup-zig
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with:
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version: "0.17.0"
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cache-key: ci-unit-ReleaseSafe
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# shell_parity compares fx's parse with sh, dash, bash, and zsh.
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- name: Install zsh
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if: matrix.target == 'shell_parity'
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run: command -v zsh >/dev/null || { sudo apt-get update -qq && sudo apt-get install -y -qq zsh; }
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- name: Fuzz
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env:
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TARGET: ${{ matrix.target }}
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BUDGET_SECONDS: ${{ github.event_name == 'pull_request' && '120' || '1200' }}
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run: >-
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python3 -m scripts.fuzz_nightly run
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--target "$TARGET"
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--out fuzz-output
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--budget-seconds "$BUDGET_SECONDS"
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- name: Upload failure evidence
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if: failure()
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uses: actions/upload-artifact@v4
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with:
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name: fuzz-${{ matrix.target }}
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path: fuzz-output/
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if-no-files-found: warn
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retention-days: 30
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# Only main reports, so a dispatch on a branch cannot open issues.
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- name: Report failure
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if: failure() && github.ref == 'refs/heads/main'
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env:
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GH_TOKEN: ${{ github.token }}
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TARGET: ${{ matrix.target }}
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RUN_URL: ${{ github.server_url }}/${{ github.repository }}/actions/runs/${{ github.run_id }}
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run: >-
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python3 -m scripts.fuzz_nightly report
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--target "$TARGET"
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--out fuzz-output
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--repo "$GITHUB_REPOSITORY"
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--run-url "$RUN_URL"
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--commit "$GITHUB_SHA"
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