base.Fatalf("failed to stop trace: %v", err)
		}
	})

	return ctx
}

// handleChdirFlag handles the -C flag before doing anything else.
// The -C flag must be the first flag on the command line, to make it easy to find
// even with commands that have custom flag parsing.
// handleChdirFlag handles the flag by chdir'ing to the directory
// and then removing that flag from the command line entirely.
//