555472a186
Currently, the dump methods open BpfMap objects and never close them. This leaks filedescriptors, and if dump is called often enough, will crash the networkstack process. Fix this by using try-with-resources statements that automatically close the map when exiting the try block. Change the signature of BpfMap#close from "throws Exception" to "throws ErrnoException" since it does not throw any other type of checked exceptions. Test: "lsof | grep network_st" while running "dumpsys tethering bpf" in a loop Change-Id: I66c407454c2715bf41bf3a2e81bd582f9ea5a905