func (a *llvmSymbolizerJob) close() {
	a.in.Close()
	a.cmd.Wait()
}

// newLLVMSymbolizer starts the given llvmSymbolizer command reporting
// information about the given executable file. If file is a shared
// library, base should be the address at which it was mapped in the
// program under consideration.
func newLLVMSymbolizer(cmd, file string, base uint64, isData bool) (*llvmSymbolizer, error) {
	if cmd == "" {