threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
60 lines
1.8 KiB
Bash
Executable File
60 lines
1.8 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 $0)/lib/probe.sh
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ld=$(realpath /lib64/ld*.so.* | uniq)
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libc=$(echo $ld | sed 's/ld/libc/g')
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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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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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