• olsajiri's avatar
    Add shmsnoop/sofdsnoop tools v2 (#2045) · b5114229
    olsajiri authored
    * tools: Add shmsnoop to spy on shm* syscalls
    
    Adding shmsnoop tool to trace System V shared memory
    syscalls: shmget, shmat, shmdt, shmctl
    
      # ./shmsnoop.py
      PID    COMM                SYS              RET ARGs
      19813  server           SHMGET            10000 key: 0x78020001, size: 20, shmflg: 0x3b6 (IPC_CREAT|0666)
      19813  server            SHMAT     7f1cf8b1f000 shmid: 0x10000, shmaddr: 0x0, shmflg: 0x0
      19816  client           SHMGET            10000 key: 0x78020001, size: 20, shmflg: 0x1b6 (0666)
      19816  client            SHMAT     7f4fd8ee7000 shmid: 0x10000, shmaddr: 0x0, shmflg: 0x0
      19816  client            SHMDT                0 shmaddr: 0x7f4fd8ee7000
      19813  server            SHMDT                0 shmaddr: 0x7f1cf8b1f000
      19813  server           SHMCTL                0 shmid: 0x10000, cmd: 0, buf: 0x0
    
    Every call the shm* syscall (SHM column) is displayed
    on separate line together with process info (PID/COMM
    columns) and argument details: return value (RET column)
    and syscall arguments (ARGs column).
    
    The ARGs column contains 'arg: value' couples that represent
    given syscall arguments as described in their manpage.
    
    It supports standard options to filter on pid/tid,
    to specify duration of the trace and command name
    filter, like:
    
        ./shmsnoop           # trace all shm*() syscalls
        ./shmsnoop -T        # include timestamps
        ./shmsnoop -p 181    # only trace PID 181
        ./shmsnoop -t 123    # only trace TID 123
        ./shmsnoop -d 10     # trace for 10 seconds only
        ./shmsnoop -n main   # only print process names containing "main"
    
    * tools: Add sofdsnoop to spy on fds passed through socket
    
    The sofdsnoop traces FDs passed through unix sockets.
    
      # ./sofdsnoop
      ACTION TID    COMM             SOCKET                    FD    NAME
      SEND   2576   Web Content      24:socket:[39763]         51    /dev/shm/org.mozilla.ipc.2576.23874
      RECV   2576   Web Content      49:socket:[809997]        51
      SEND   2576   Web Content      24:socket:[39763]         58    N/A
      RECV   2464   Gecko_IOThread   75:socket:[39753]         55
    
    Every file descriptor that is passed via unix sockets os displayed
    on separate line together with process info (TID/COMM columns),
    ACTION details (SEND/RECV), file descriptor number (FD) and its
    translation to file if available (NAME).
    
    examples:
        ./sofdsnoop           # trace file descriptors passes
        ./sofdsnoop -T        # include timestamps
        ./sofdsnoop -p 181    # only trace PID 181
        ./sofdsnoop -t 123    # only trace TID 123
        ./sofdsnoop -d 10     # trace for 10 seconds only
        ./sofdsnoop -n main   # only print process names containing "main"
    b5114229
shmsnoop_example.txt 2.73 KB