a79c0038ae
Debug packages are fairly useless currently because the soucre files needed for stepping through code etc are not packaged with them. This patch adds the needed source files to the debug package and adjusts the debug info to look at the /usr/src/debug/ directory for them rather than the build location. This requires using the "debugedit" program which is provided as part of the RPM sources. Signed-off-by: Allan McRae <allan@archlinux.org>
135 lines
3.8 KiB
Bash
135 lines
3.8 KiB
Bash
#!/bin/bash
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#
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# strip.sh - Strip debugging symbols from binary files
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#
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# Copyright (c) 2007-2016 Pacman Development Team <pacman-dev@archlinux.org>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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[[ -n "$LIBMAKEPKG_TIDY_STRIP_SH" ]] && return
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LIBMAKEPKG_TIDY_STRIP_SH=1
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LIBRARY=${LIBRARY:-'@libmakepkgdir@'}
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source "$LIBRARY/util/message.sh"
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source "$LIBRARY/util/option.sh"
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packaging_options+=('strip' 'debug')
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tidy_modify+=('tidy_strip')
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build_id() {
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LANG=C readelf -n $1 | sed -n '/Build ID/ { s/.*: //p; q; }'
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}
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source_files() {
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LANG=C readelf $1 --debug-dump | \
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awk '/DW_AT_name +:/{name=$8}/DW_AT_comp_dir +:/{print $8 "/" name}'
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}
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strip_file() {
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local binary=$1; shift
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if check_option "debug" "y"; then
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local bid=$(build_id "$binary")
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# has this file already been stripped
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if [[ -n "$bid" ]]; then
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if [[ -f "$dbgdir/.build-id/${bid:0:2}/${bid:2}.debug" ]]; then
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return
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fi
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elif [[ -f "$dbgdir/$binary.debug" ]]; then
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return
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fi
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# copy source files to debug directory
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local f t
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for f in $(source_files "$binary"); do
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t=${f/$srcdir/$dbgsrc}
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mkdir -p "${t%/*}"
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cp "$f" "$t"
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done
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# adjust debug symbols to point at sources
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debugedit -b "${srcdir}" -d /usr/src/debug/ -i "$binary" &> /dev/null
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# copy debug symbols to debug directory
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mkdir -p "$dbgdir/${binary%/*}"
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objcopy --only-keep-debug "$binary" "$dbgdir/$binary.debug"
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objcopy --add-gnu-debuglink="$dbgdir/${binary#/}.debug" "$binary"
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# create any needed hardlinks
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while read -rd '' file ; do
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if [[ "${binary}" -ef "${file}" && ! -f "$dbgdir/${file}.debug" ]]; then
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mkdir -p "$dbgdir/${file%/*}"
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ln "$dbgdir/${binary}.debug" "$dbgdir/${file}.debug"
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fi
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done < <(find . -type f -perm -u+w -print0 2>/dev/null)
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if [[ -n "$bid" ]]; then
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local target
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mkdir -p "$dbgdir/.build-id/${bid:0:2}"
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target="../../../../../${binary#./}"
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target="${target/..\/..\/usr\/lib\/}"
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target="${target/..\/usr\/}"
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ln -s "$target" "$dbgdir/.build-id/${bid:0:2}/${bid:2}"
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target="../../${binary#./}.debug"
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ln -s "$target" "$dbgdir/.build-id/${bid:0:2}/${bid:2}.debug"
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fi
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fi
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strip $@ "$binary"
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}
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tidy_strip() {
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if check_option "strip" "y"; then
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msg2 "$(gettext "Stripping unneeded symbols from binaries and libraries...")"
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# make sure library stripping variables are defined to prevent excess stripping
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[[ -z ${STRIP_SHARED+x} ]] && STRIP_SHARED="-S"
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[[ -z ${STRIP_STATIC+x} ]] && STRIP_STATIC="-S"
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if check_option "debug" "y"; then
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dbgdir="$pkgdir-@DEBUGSUFFIX@/usr/lib/debug"
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dbgsrc="$pkgdir-@DEBUGSUFFIX@/usr/src/debug"
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mkdir -p "$dbgdir" "$dbgsrc"
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fi
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local binary strip_flags
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find . -type f -perm -u+w -print0 2>/dev/null | while read -rd '' binary ; do
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case "$(file -bi "$binary")" in
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*application/x-sharedlib*) # Libraries (.so)
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strip_flags="$STRIP_SHARED";;
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*application/x-archive*) # Libraries (.a)
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strip_flags="$STRIP_STATIC";;
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*application/x-object*)
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case "$binary" in
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*.ko) # Kernel module
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strip_flags="$STRIP_SHARED";;
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*)
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continue;;
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esac;;
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*application/x-executable*) # Binaries
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strip_flags="$STRIP_BINARIES";;
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*)
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continue ;;
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esac
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strip_file "$binary" ${strip_flags}
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done
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fi
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}
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