2d760816ff
Windows does not have CLOEXEC, but rather handles are marked explicitly for being inherited by new processes. This can cause problems when different Windows functions create new processes from different threads. syscall.StartProcess has traditionally used a mutex to prevent races with itself, but this doesn't handle races with other win32 functions. Fortunately there's a solution: PROC_THREAD_ATTRIBUTE_HANDLE_LIST allows us to pass the entire list of handles that we want to be inherited. This lets us get rid of the mutex and also makes process creation safe across the Go runtime, no matter the context. Updates #44011. Change-Id: Ia3424cd2ec64868849cbd6cbb5b0d765224bf4ab Reviewed-on: https://go-review.googlesource.com/c/go/+/288297 Trust: Jason A. Donenfeld <Jason@zx2c4.com> Trust: Alex Brainman <alex.brainman@gmail.com> Reviewed-by: Alex Brainman <alex.brainman@gmail.com> |
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The Go Programming Language
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