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authorArnaldo Carvalho de Melo <acme@redhat.com>2018-10-26 13:51:45 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2018-10-30 11:46:23 -0300
commit23c07a23cbed389d0b9c7a06486574621df8d1a4 (patch)
tree85eb99fe20da0cb46509b8c51b9dde872227bd5e /tools
parent476c92cacf383c83584ba02d06c88cf18f062afb (diff)
downloadlinux-23c07a23cbed389d0b9c7a06486574621df8d1a4.tar.bz2
perf trace: Beautify mount's first pathname arg
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.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/builtin-trace.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index d286f73ef2e5..dc8a6c4986ce 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -727,7 +727,8 @@ static struct syscall_fmt {
[2] = { .scnprintf = SCA_MMAP_PROT, /* prot */ },
[3] = { .scnprintf = SCA_MMAP_FLAGS, /* flags */ }, }, },
{ .name = "mount",
- .arg = { [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */
+ .arg = { [0] = { .scnprintf = SCA_FILENAME, /* dev_name */ },
+ [3] = { .scnprintf = SCA_MOUNT_FLAGS, /* flags */
.mask_val = SCAMV_MOUNT_FLAGS, /* flags */ }, }, },
{ .name = "mprotect",
.arg = { [0] = { .scnprintf = SCA_HEX, /* start */ },