Dump debug info for an ELF file

dump-debuginfo

#!/bin/bash

set -eou pipefail

me="$(basename $BASH_SOURCE)"

if [ $# -ne 1 ]; then
    echo >&2 usage: "$me" /path/to/binary/to/dump
    exit 1
fi

bin=$1

if [ ! -f "$bin" ]; then
    echo >&2 "\"$bin\" does not exist"
    exit 1
fi

command -v objcopy >/dev/null 2>&1 || {
  echo >&2 "objcopy not on path; try installing binutils"
  exit 1
}

echo >&2 "dumping debug info for $bin"

tmpdir=$(mktemp --directory --tmpdir dump-debuginfo.XXXXXX)
function rmtmp {
    rm -r "$tmpdir"
}
trap rmtmp EXIT

dest="$tmpdir/sections"
mkdir "$dest"

tgz=$(mktemp --suffix=.tgz debug-info.XXXXXX)

for section in debug_abbrev debug_info debug_str; do
    objcopy --dump-section ".$section=$tmpdir/sections/$section" "$bin"
done

tar czf "$tgz" --directory="$tmpdir" "sections"

echo >&2 "dumped debug info in $tgz"