• Thomas Richter's avatar
    perf test record+probe_libc_inet_pton: Fix call chain match on s390 · 311693ce
    Thomas Richter authored
    With Fedora 38 the perf test 86 probe libc's inet_pton fails on s390.
    The call chain of the ping command changed.  The functions
    text_to_binary_address() and gaih_inet() do not show up in the call
    chain anymore.
    
    Output before:
    
      # ./perf test -v 86
      86: probe libc's inet_pton & backtrace it with ping                 :
      --- start ---
      test child forked, pid 541050
      fgrep: warning: fgrep is obsolescent; using grep -F
      fgrep: warning: fgrep is obsolescent; using grep -F
      BFD: DWARF error: could not find variable specification at offset 0x22011
      ...
    
      ping 541078 [002] 348826.679581: probe_libc:inet_pton_1: (3ffad84b940)
      14b940 __GI___inet_pton+0x0 (/usr/lib64/libc.so.6)
      10e9c3 __GI_getaddrinfo+0xeb3 (inlined)
      4397 main+0x737 (/usr/bin/ping)
       FAIL: expected backtrace entry "gaih_inet.*\+0x[[:xdigit:]]\
              +[[:space:]]\(/usr/lib64/libc.so.6|inlined\)$"
              got "4397 main+0x737 (/usr/bin/ping)"
      test child finished with -1
      ---- end ----
      probe libc's inet_pton & backtrace it with ping: FAILED!
      #
    
    Output after:
    
      # ./perf test -v 86
      86: probe libc's inet_pton & backtrace it with ping                 :
      --- start ---
      test child forked, pid 541098
      fgrep: warning: fgrep is obsolescent; using grep -F
      fgrep: warning: fgrep is obsolescent; using grep -F
      BFD: DWARF error: could not find variable specification at offset 0x309d1
      ...
    
      ping 541126 [006] 349309.099067: probe_libc:inet_pton_1: (3ffb7f4b940)
      14b940 __GI___inet_pton+0x0 (/usr/lib64/libc.so.6)
      10e9c3 __GI_getaddrinfo+0xeb3 (inlined)
      4397 main+0x737 (/usr/bin/ping)
      test child finished with 0
      ---- end ----
      probe libc's inet_pton & backtrace it with ping: Ok
      #
    Signed-off-by: default avatarThomas Richter <tmricht@linux.ibm.com>
    Cc: Heiko Carstens <hca@linux.ibm.com>
    Cc: Sumanth Korikkar <sumanthk@linux.ibm.com>
    Cc: Sven Schnelle <svens@linux.ibm.com>
    Cc: Vasily Gorbik <gor@linux.ibm.com>
    Link: https://lore.kernel.org/r/20230503081134.3372415-1-tmricht@linux.ibm.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
    311693ce
record+probe_libc_inet_pton.sh 3.34 KB