0f19a038af
Using Fedora 27 and latest Linux kernel the test case
trace+probe_libc_inet_pton.sh fails again on s390. This time is the
inlining of functions which does not match. After an update of the
glibc (from 2.26-16 to 2.26-24) the output is different
The expected output is:
__inet_pton (/usr/lib64/libc-2.26.so)
gaih_inet (inlined)
....
The actual output is:
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 0.061/0.061/0.061/0.000 ms
0.000 probe_libc:inet_pton:(3ffb2140448))
__inet_pton (inlined)
gaih_inet.constprop.7 (/usr/lib64/libc-2.26.so)
...
Fix this by being less strict on 'inlined' verses library name and
accept both
Signed-off-by: Thomas Richter <tmricht@linux.vnet.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Link: http://lkml.kernel.org/r/20180214070303.55757-1-tmricht@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
63 lines
2.0 KiB
Bash
Executable File
63 lines
2.0 KiB
Bash
Executable File
# probe libc's inet_pton & backtrace it with ping
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# Installs a probe on libc's inet_pton function, that will use uprobes,
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# then use 'perf trace' on a ping to localhost asking for just one packet
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# with the a backtrace 3 levels deep, check that it is what we expect.
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# This needs no debuginfo package, all is done using the libc ELF symtab
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# and the CFI info in the binaries.
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# Arnaldo Carvalho de Melo <acme@kernel.org>, 2017
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. $(dirname $0)/lib/probe.sh
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libc=$(grep -w libc /proc/self/maps | head -1 | sed -r 's/.*[[:space:]](\/.*)/\1/g')
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nm -g $libc 2>/dev/null | fgrep -q inet_pton || exit 254
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trace_libc_inet_pton_backtrace() {
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idx=0
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expected[0]="PING.*bytes"
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expected[1]="64 bytes from ::1.*"
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expected[2]=".*ping statistics.*"
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expected[3]=".*packets transmitted.*"
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expected[4]="rtt min.*"
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expected[5]="[0-9]+\.[0-9]+[[:space:]]+probe_libc:inet_pton:\([[:xdigit:]]+\)"
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expected[6]=".*inet_pton[[:space:]]\($libc|inlined\)$"
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case "$(uname -m)" in
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s390x)
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eventattr='call-graph=dwarf'
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expected[7]="gaih_inet.*[[:space:]]\($libc|inlined\)$"
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expected[8]="__GI_getaddrinfo[[:space:]]\($libc|inlined\)$"
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expected[9]="main[[:space:]]\(.*/bin/ping.*\)$"
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expected[10]="__libc_start_main[[:space:]]\($libc\)$"
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expected[11]="_start[[:space:]]\(.*/bin/ping.*\)$"
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;;
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*)
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eventattr='max-stack=3'
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expected[7]="getaddrinfo[[:space:]]\($libc\)$"
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expected[8]=".*\(.*/bin/ping.*\)$"
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;;
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esac
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perf trace --no-syscalls -e probe_libc:inet_pton/$eventattr/ ping -6 -c 1 ::1 2>&1 | grep -v ^$ | while read line ; do
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echo $line
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echo "$line" | egrep -q "${expected[$idx]}"
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if [ $? -ne 0 ] ; then
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printf "FAIL: expected backtrace entry %d \"%s\" got \"%s\"\n" $idx "${expected[$idx]}" "$line"
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exit 1
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fi
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let idx+=1
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[ -z "${expected[$idx]}" ] && break
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done
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}
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# Check for IPv6 interface existence
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ip a sh lo | fgrep -q inet6 || exit 2
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skip_if_no_perf_probe && \
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perf probe -q $libc inet_pton && \
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trace_libc_inet_pton_backtrace
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err=$?
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rm -f ${file}
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perf probe -q -d probe_libc:inet_pton
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exit $err
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