35435cd060
Since we do not specify bash (and/or zsh) as a requirement, use the standard error redirection that is more widely supported. Signed-off-by: Kim Phillips <kim.phillips@arm.com> Link: http://lkml.kernel.org/n/tip-ji5mhn3iilgch3eaay6csr6z@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
44 lines
1.4 KiB
Bash
Executable File
44 lines
1.4 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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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:]]\(/usr/lib.*/libc-[0-9]+\.[0-9]+\.so\)$"
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expected[7]="getaddrinfo[[:space:]]\(/usr/lib.*/libc-[0-9]+\.[0-9]+\.so\)$"
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expected[8]=".*\(.*/bin/ping.*\)$"
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perf trace --no-syscalls -e probe_libc:inet_pton/max-stack=3/ ping -6 -c 1 ::1 2>&1 | grep -v ^$ | 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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[ $idx -eq 9 ] && break
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done
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}
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skip_if_no_perf_probe && \
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perf probe -q /lib64/libc-*.so inet_pton && \
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trace_libc_inet_pton_backtrace
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err=$?
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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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