dotcloud/docker

//go:build !windows

package daemon // import "github.com/docker/docker/daemon"

import (
    "context"
    "os"
    "os/signal"

    "github.com/containerd/log"
    "github.com/docker/docker/pkg/stack"
    "golang.org/x/sys/unix"
)

func (daemon *Daemon) setupDumpStackTrap(root string) {
    c := make(chan os.Signal, 1)
    signal.Notify(c, unix.SIGUSR1)
    go func() {
        for range c {
            path, err := stack.DumpToFile(root)
            if err != nil {
                log.G(context.TODO()).WithError(err).Error("failed to write goroutines dump")
            } else {
                log.G(context.TODO()).Infof("goroutine stacks written to %s", path)
            }
        }
    }()
}