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|
#!/bin/bash
# Compare the ELF generated for the shipped
# tools between two bpftrace builds
#
set -o pipefail
set -e
set -u
if [[ "$#" -ne 4 ]]; then
echo "Compare IR generated between two bpftrace builds"
echo ""
echo "USAGE:"
echo "$(basename $0) <bpftrace_A> <bpftrace_B> <objdump> <tooldir>"
echo ""
echo "EXAMPLE:"
echo "$(basename $0) bpftrace_master bpftrace llvm-objdump-7 ./tools"
echo ""
exit 1
fi
BPF_A=$(command -v "$1") || ( echo "ERROR: $1 not found"; exit 1 )
BPF_B=$(command -v "$2") || ( echo "ERROR: $2 not found"; exit 1 )
OBJDUMP=$(command -v "$3") || (echo "ERROR: $3 not found"; exit 1 )
TOOLDIR=$4
[[ -d "$TOOLDIR" ]] || (echo "tooldir does not appear to be a directory: ${TOOLDIR}"; exit 1)
TMPDIR=$(mktemp -d)
[[ $? -ne 0 || -z $TMPDIR ]] && (echo "Failed to create tmp dir"; exit 10)
cd $TMPDIR
set +e
function hash() {
file="${1}"
sha1sum "${1}" | awk '{print $1}'
}
echo "Using version $($BPF_A -V) and $($BPF_B -V)"
for script in ${TOOLDIR}/*.bt; do
s=$(basename ${script/.bt/})
echo "Checking $s"
2>&1 $BPF_A --emit-elf "a_${s}" "$script" >/dev/null
2>&1 $BPF_B --emit-elf "b_${s}" "$script" >/dev/null
if [ $? -ne 0 ]; then
echo "###############################"
echo "bpftrace failed on script: ${s}"
echo "###############################"
continue
fi
if [[ $(hash "a_${s}") != $(hash "b_${s}") ]]; then
echo "###############################"
echo "Change detected for script: ${s}"
diff -u <($OBJDUMP -S "a_${s}") <($OBJDUMP -S "b_${s}")
fi
done
[[ -n ${TMPDIR} ]] && rm -rf "${TMPDIR}"
|
