reportWhenPIDGone
parent
572491fea4
commit
6eb7b7b7ac
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@ -20,10 +20,12 @@ import (
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"reflect"
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"strings"
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"sync"
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"time"
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"github.com/jacobsa/bazilfuse"
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"github.com/jacobsa/reqtrace"
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"golang.org/x/net/context"
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"golang.org/x/sys/unix"
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)
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var fTraceByPID = flag.Bool(
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@ -68,10 +70,34 @@ var gPIDMapMu sync.Mutex
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// GUARDED_BY(gPIDMapMu)
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var gPIDMap = make(map[int]context.Context)
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// Wait until the process completes, then close off the trace and remove the
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// context from the map.
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func reportWhenPIDGone(
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pid int,
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ctx context.Context,
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report reqtrace.ReportFunc)
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report reqtrace.ReportFunc) {
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// HACK(jacobsa): Poll for completion.
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const pollPeriod = 50 * time.Millisecond
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for {
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err := unix.Kill(pid, 0)
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if err == unix.ESRCH {
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break
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}
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if err != nil {
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panic(fmt.Errorf("Kill(%v): %v", pid, err))
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}
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time.Sleep(pollPeriod)
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}
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// Finish up.
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report(nil)
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gPIDMapMu.Lock()
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delete(gPIDMap, pid)
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gPIDMapMu.Unlock()
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}
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func (o *commonOp) maybeTraceByPID(
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in context.Context,
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