diff options
Diffstat (limited to 'vendor/github.com/Microsoft/hcsshim/internal/hcs/watcher.go')
| -rw-r--r-- | vendor/github.com/Microsoft/hcsshim/internal/hcs/watcher.go | 41 |
1 files changed, 0 insertions, 41 deletions
diff --git a/vendor/github.com/Microsoft/hcsshim/internal/hcs/watcher.go b/vendor/github.com/Microsoft/hcsshim/internal/hcs/watcher.go deleted file mode 100644 index f85ed3187..000000000 --- a/vendor/github.com/Microsoft/hcsshim/internal/hcs/watcher.go +++ /dev/null @@ -1,41 +0,0 @@ -package hcs - -import ( - "context" - - "github.com/Microsoft/hcsshim/internal/logfields" - "github.com/Microsoft/hcsshim/internal/timeout" - "github.com/sirupsen/logrus" -) - -// syscallWatcher is used as a very simple goroutine around calls into -// the platform. In some cases, we have seen HCS APIs not returning due to -// various bugs, and the goroutine making the syscall ends up not returning, -// prior to its async callback. By spinning up a syscallWatcher, it allows -// us to at least log a warning if a syscall doesn't complete in a reasonable -// amount of time. -// -// Usage is: -// -// syscallWatcher(logContext, func() { -// err = <syscall>(args...) -// }) -// - -func syscallWatcher(logContext logrus.Fields, syscallLambda func()) { - ctx, cancel := context.WithTimeout(context.Background(), timeout.SyscallWatcher) - defer cancel() - go watchFunc(ctx, logContext) - syscallLambda() -} - -func watchFunc(ctx context.Context, logContext logrus.Fields) { - select { - case <-ctx.Done(): - if ctx.Err() != context.Canceled { - logrus.WithFields(logContext). - WithField(logfields.Timeout, timeout.SyscallWatcher). - 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.") - } - } -} |