diff options
| -rwxr-xr-x | tools/perf/tests/shell/trace+probe_libc_inet_pton.sh | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/tools/perf/tests/shell/trace+probe_libc_inet_pton.sh b/tools/perf/tests/shell/trace+probe_libc_inet_pton.sh new file mode 100755 index 000000000000..1b9a276e2ace --- /dev/null +++ b/tools/perf/tests/shell/trace+probe_libc_inet_pton.sh @@ -0,0 +1,40 @@ +# probe libc's inet_pton & backtrace it with ping + +# Installs a probe on libc's inet_pton function, that will use uprobes, +# then use 'perf trace' on a ping to localhost asking for just one packet +# with the a backtrace 3 levels deep, check that it is what we expect. +# This needs no debuginfo package, all is done using the libc ELF symtab +# and the CFI info in the binaries. + +# Arnaldo Carvalho de Melo <acme@kernel.org>, 2017 + +trace_libc_inet_pton_backtrace() { + idx=0 + expected[0]="PING.*bytes" + expected[1]="64 bytes from ::1.*" + expected[2]=".*ping statistics.*" + expected[3]=".*packets transmitted.*" + expected[4]="rtt min.*" + expected[5]="[0-9]+\.[0-9]+[[:space:]]+probe_libc:inet_pton:\([[:xdigit:]]+\)" + expected[6]=".*inet_pton[[:space:]]\(/usr/lib.*/libc-[0-9]+\.[0-9]+\.so\)$" + expected[7]="getaddrinfo[[:space:]]\(/usr/lib.*/libc-[0-9]+\.[0-9]+\.so\)$" + expected[8]=".*\(.*/bin/ping.*\)$" + + perf trace --no-syscalls -e probe_libc:inet_pton/max-stack=3/ ping -6 -c 1 ::1 |& grep -v ^$ | while read line ; do + echo $line + echo "$line" | egrep -q "${expected[$idx]}" + if [ $? -ne 0 ] ; then + printf "FAIL: expected backtrace entry %d \"%s\" got \"%s\"\n" $idx "${expected[$idx]}" "$line" + exit 1 + fi + let idx+=1 + [ $idx -eq 9 ] && break + done +} + +perf probe -q /lib64/libc-*.so inet_pton && \ +trace_libc_inet_pton_backtrace +err=$? +rm -f ${file} +perf probe -q -d probe_libc:inet_pton +exit $err |