• Arnaldo Carvalho de Melo's avatar
    perf trace: Beautify mount's first pathname arg · 23c07a23
    Arnaldo Carvalho de Melo authored
    The pathname beautifiers so far support just one augmented pathname per
    syscall, so do it just for mount's first arg, later this will get fixed.
    
    With:
    
      # perf probe -l
      probe:vfs_getname    (on getname_flags:73@acme/git/linux/fs/namei.c with pathname)
      #
    
    Later this will get added to augmented_syscalls.c (eBPF):
    
    In one xterm:
    
      # perf trace -e mount,umount
      2687.331 ( 3.544 ms): mount/8892 mount(dev_name: /mnt, dir_name: 0x561f9ac184a0, type: 0x561f9ac1b170, flags: BIND) = 0
      3912.126 ( 8.807 ms): umount/8895 umount2(name: /mnt) = 0
      ^C#
    
    In the other:
    
      $ sudo mount --bind /proc /mnt
      $ sudo umount /mnt
    
    Cc: Adrian Hunter <adrian.hunter@intel.com>
    Cc: Benjamin Peterson <benjamin@python.org>
    Cc: David Ahern <dsahern@gmail.com>
    Cc: Jiri Olsa <jolsa@kernel.org>
    Cc: Namhyung Kim <namhyung@kernel.org>
    Cc: Wang Nan <wangnan0@huawei.com>
    Link: https://lkml.kernel.org/n/tip-qsvhrm2es635cl4zicqjeth2@git.kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    23c07a23
builtin-trace.c 99.8 KB