DO NOT MERGE: Add strace filesystem tracing workflow#2
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Adds a Linux-only, workflow_dispatch GitHub Actions workflow that runs the MSBuild build under strace and uploads a filtered trace artifact so operators can answer "which process deleted/rewrote my file?". Design notes: - strace -P is exact-path, not recursive, and misses relative-path syscalls after chdir, so we capture the full trace and post-filter with grep -F against both absolute and repo-relative path forms. - -e trace=%file only covers path-arg syscalls; we additionally trace write/writev/pwrite64/close/ftruncate/copy_file_range and use -yy so fd-arg syscalls carry their backing path for grep to attribute. - Restore runs untraced (network/disk I/O outside the trace folder) to cut runtime roughly in half without losing signal. - Includes a strace smoke test that verifies the capture-then-grep approach records subtree events before the real build runs. - PID extraction uses sed -nE (mawk on Ubuntu does not support gawk's 3-arg match(..., arr) form). - Top-N reductions use awk 'NR<=N' rather than '| head -N' to avoid SIGPIPE on upstream sort under the default -e -o pipefail shell. - Build is scoped via --projects by default (Framework only) and --nodeReuse false for deterministic process boundaries; users can override both inputs at dispatch time. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Adds a pull_request trigger so the workflow runs (and produces its artifact) on PRs without first merging to main. On pull_request events `inputs.*` is null, so env vars now use `|| 'default'` to fall back to the same defaults shown in the workflow_dispatch UI. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Reopening against upstream dotnet/msbuild instead. |
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DO NOT MERGE - opened only to trigger the
Strace Filesystem Tracingworkflow on the head commit so the artifact can be downloaded and verified.Adds a workflow_dispatch + pull_request GitHub Actions workflow that runs the MSBuild build under
straceon Linux and uploads a filtered filesystem trace as an artifact (msbuild-strace-trace: gzipped log + summary). Used to attribute file operations (delete/rewrite/truncate) to specific PIDs.Defaults: trace
artifacts/bin/Microsoft.Build.Framework/Debug/net10.0,Debugconfig, scoped tosrc/Framework/Microsoft.Build.Framework.csprojto keep runtime down. All overridable viaworkflow_dispatchinputs after merging.