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Subjectperf test vfs_getname failed
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Hi Arnaldo

i encounter some problem when running perf test, the details arelike below:

-----------------------------

[lizj@rhel71 perf]$ sudo ./perf test vfs_getname -v
61: Add vfs_getname probe to get syscall args filenames :
--- start ---
test child forked, pid 5958
Failed to find 'result' in this function.
Error: Failed to add events.
test child finished with -1
---- end ----
Add vfs_getname probe to get syscall args filenames: FAILED!
62: Use vfs_getname probe to get syscall args filenames :
--- start ---
test child forked, pid 5979
Failed to find 'result' in this function.
Error: Failed to add events.
test child finished with -1
---- end ----
Use vfs_getname probe to get syscall args filenames: FAILED!
63: Check open filename arg using perf trace + vfs_getname:
--- start ---
test child forked, pid 6001
Failed to find 'result' in this function.
Error: Failed to add events.
test child finished with -1
---- end ----
Check open filename arg using perf trace + vfs_getname: FAILED!
-----------------------------

my environment:
1. perf features
the enabled features are:
-----------------------------

Auto-detecting system features:
... dwarf: [ on ]
... dwarf_getlocations: [ on ]
... glibc: [ on ]
... gtk2: [ on ]
... libaudit: [ on ]
... libbfd: [ on ]
... libelf: [ on ]
... libnuma: [ on ]
... numa_num_possible_cpus: [ on ]
... libperl: [ on ]
... libpython: [ on ]
... libslang: [ OFF ]
... libcrypto: [ on ]
... libunwind: [ on ]
... libdw-dwarf-unwind: [ on ]
... zlib: [ on ]
... lzma: [ on ]
... get_cpuid: [ on ]
... bpf: [ on ]
-----------------------------
2. host
[lizj@rhel71 perf]$ cat /etc/redhat-release
Red Hat Enterprise Linux Server release 7.1 Beta (Maipo)

3. kernel
[lizj@rhel71 perf]$ uname -a
Linux rhel71 4.14.0-rc1+ #2 SMP Wed Oct 18 23:49:30 EDT 2017 x86_64 x86_64 x86_64 GNU/Linux

if i miss something, fell free to let me know :)

Thanks

Zhijian


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