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perf tests shell: Add check for perf data file in record+probe_libc_inet_pton test
The "probe libc's inet_pton & backtrace it with ping" test installs a uprobe and uses perf record/script to check the backtrace. Currently even if the "perf record" fails, the test reports success. Logs below: # ./perf test -v "probe libc's inet_pton & backtrace it with ping" 81: probe libc's inet_pton & backtrace it with ping : --- start --- test child forked, pid 304211 failed to open /tmp/perf.data.Btf: No such file or directory test child finished with 0 ---- end ---- probe libc's inet_pton & backtrace it with ping: Ok Fix this by adding check for presence of perf.data file before proceeding with "perf script". With the patch changes, test reports fail correctly. # ./perf test -v "probe libc's inet_pton & backtrace it with ping" 81: probe libc's inet_pton & backtrace it with ping : --- start --- test child forked, pid 304358 FAIL: perf record failed to create "/tmp/perf.data.Uoi" test child finished with -1 ---- end ---- probe libc's inet_pton & backtrace it with ping: FAILED! Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Disha Goel <disgoel@linux.ibm.com> Cc: Ian Rogers <irogers@google.com> Cc: James Clark <james.clark@arm.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Kajol Jain <kjain@linux.ibm.com> Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Nageswara R Sastry <rnsastry@linux.ibm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: linuxppc-dev@lists.ozlabs.org Link: http://lore.kernel.org/r/20230201180421.59640-1-atrajeev@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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@ -58,6 +58,11 @@ trace_libc_inet_pton_backtrace() {
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perf_data=`mktemp -u /tmp/perf.data.XXX`
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perf_script=`mktemp -u /tmp/perf.script.XXX`
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perf record -e $event_name/$eventattr/ -o $perf_data ping -6 -c 1 ::1 > /dev/null 2>&1
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# check if perf data file got created in above step.
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if [ ! -e $perf_data ]; then
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printf "FAIL: perf record failed to create \"%s\" \n" "$perf_data"
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return 1
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fi
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perf script -i $perf_data | tac | grep -m1 ^ping -B9 | tac > $perf_script
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exec 3<$perf_script
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