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34 lines
1.1 KiB
Go
34 lines
1.1 KiB
Go
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package hcs
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import (
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"time"
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"github.com/Microsoft/hcsshim/internal/logfields"
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"github.com/Microsoft/hcsshim/internal/timeout"
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"github.com/sirupsen/logrus"
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)
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// syscallWatcher is used as a very simple goroutine around calls into
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// the platform. In some cases, we have seen HCS APIs not returning due to
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// various bugs, and the goroutine making the syscall ends up not returning,
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// prior to its async callback. By spinning up a syscallWatcher, it allows
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// us to at least log a warning if a syscall doesn't complete in a reasonable
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// amount of time.
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//
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// Usage is:
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//
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// completed := false
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// go syscallWatcher(context, &completed)
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// <syscall>
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// completed = true
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//
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func syscallWatcher(context logrus.Fields, syscallCompleted *bool) {
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time.Sleep(timeout.SyscallWatcher)
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if *syscallCompleted {
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return
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}
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logrus.WithFields(context).
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WithField(logfields.Timeout, timeout.SyscallWatcher).
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Warning("Syscall did not complete within operation timeout. This may indicate a platform issue. If it appears to be making no forward progress, obtain the stacks and see if there is a syscall stuck in the platform API for a significant length of time.")
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}
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