fc45eb388d
Because each M in Plan 9 runs in a separate OS process with its own current working directory, a Chdir call in one goroutine needs to be propagated to other goroutines before a subsequent syscall with a local pathname (see #9428). This is done by function syscall.Fixwd, but there is still a race if a goroutine is preempted and rescheduled on a different M between calling Fixwd and executing the syscall which it protects. By locking the goroutine to its OS thread from the start of Fixwd to the end of the protected syscall, this race can be prevented. Fixes #58802. Change-Id: I89c0e43ef4544b5bfb5db7d2158f13f24b42e1f6 Reviewed-on: https://go-review.googlesource.com/c/go/+/474055 Reviewed-by: Bryan Mills <bcmills@google.com> Auto-Submit: Ian Lance Taylor <iant@golang.org> TryBot-Result: Gopher Robot <gobot@golang.org> Run-TryBot: Ian Lance Taylor <iant@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com> |
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