8bec63bf92
In commit 8b0d59b83a support was added for
storing the source files of binaries in debug packages. This made use of
the debugedit program which is part of the RPM package manager, which is
not very standalone.
The same effect can be achieved using -fdebug-prefix-map, an option
accepted by both the gcc and clang compilers which modifies how the
compiler itself stores the references to the source files rather than
requiring us to later edit the produced binaries. This also removes the
dependency on external programs like debugedit.
As a result of this change, source files will only be effectively added
for programs which actually use the exported CFLAGS. This is a reasonable
tradeoff as we expect our CFLAGS to be used rather than ignored. Upstream
software which do not produce useful debug packages are expected to fix
their build systems to respect the environment CFLAGS.
As a result of this change, the routine for extracting source filenames
from binaries had to be modified to derive the source file from the
final debug location, rather than the other way around.
Signed-off-by: Eli Schwartz <eschwartz@archlinux.org>
Signed-off-by: Allan McRae <allan@archlinux.org>
133 lines
3.8 KiB
Bash
133 lines
3.8 KiB
Bash
#!/bin/bash
|
|
#
|
|
# strip.sh - Strip debugging symbols from binary files
|
|
#
|
|
# Copyright (c) 2007-2017 Pacman Development Team <pacman-dev@archlinux.org>
|
|
#
|
|
# This program is free software; you can redistribute it and/or modify
|
|
# it under the terms of the GNU General Public License as published by
|
|
# the Free Software Foundation; either version 2 of the License, or
|
|
# (at your option) any later version.
|
|
#
|
|
# This program is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU General Public License for more details.
|
|
#
|
|
# You should have received a copy of the GNU General Public License
|
|
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
#
|
|
|
|
[[ -n "$LIBMAKEPKG_TIDY_STRIP_SH" ]] && return
|
|
LIBMAKEPKG_TIDY_STRIP_SH=1
|
|
|
|
LIBRARY=${LIBRARY:-'@libmakepkgdir@'}
|
|
|
|
source "$LIBRARY/util/message.sh"
|
|
source "$LIBRARY/util/option.sh"
|
|
|
|
|
|
packaging_options+=('strip' 'debug')
|
|
tidy_modify+=('tidy_strip')
|
|
|
|
|
|
build_id() {
|
|
LANG=C readelf -n "$1" | sed -n '/Build ID/ { s/.*: //p; q; }'
|
|
}
|
|
|
|
source_files() {
|
|
LANG=C readelf "$1" --debug-dump | \
|
|
awk '/DW_AT_name +:/{name=$8}/DW_AT_comp_dir +:/{print $8 "/" name}'
|
|
}
|
|
|
|
strip_file() {
|
|
local binary=$1; shift
|
|
|
|
if check_option "debug" "y"; then
|
|
local bid=$(build_id "$binary")
|
|
|
|
# has this file already been stripped
|
|
if [[ -n "$bid" ]]; then
|
|
if [[ -f "$dbgdir/.build-id/${bid:0:2}/${bid:2}.debug" ]]; then
|
|
return
|
|
fi
|
|
elif [[ -f "$dbgdir/$binary.debug" ]]; then
|
|
return
|
|
fi
|
|
|
|
# copy source files to debug directory
|
|
local f t
|
|
while read -r t; do
|
|
f=${t/$dbgsrc/"$srcdir"}
|
|
mkdir -p "${t%/*}"
|
|
cp -- "$f" "$t"
|
|
done < <(source_files "$binary")
|
|
|
|
# copy debug symbols to debug directory
|
|
mkdir -p "$dbgdir/${binary%/*}"
|
|
objcopy --only-keep-debug "$binary" "$dbgdir/$binary.debug"
|
|
objcopy --add-gnu-debuglink="$dbgdir/${binary#/}.debug" "$binary"
|
|
|
|
# create any needed hardlinks
|
|
while read -rd '' file ; do
|
|
if [[ "${binary}" -ef "${file}" && ! -f "$dbgdir/${file}.debug" ]]; then
|
|
mkdir -p "$dbgdir/${file%/*}"
|
|
ln "$dbgdir/${binary}.debug" "$dbgdir/${file}.debug"
|
|
fi
|
|
done < <(find . -type f -perm -u+w -print0 2>/dev/null)
|
|
|
|
if [[ -n "$bid" ]]; then
|
|
local target
|
|
mkdir -p "$dbgdir/.build-id/${bid:0:2}"
|
|
|
|
target="../../../../../${binary#./}"
|
|
target="${target/..\/..\/usr\/lib\/}"
|
|
target="${target/..\/usr\/}"
|
|
ln -s "$target" "$dbgdir/.build-id/${bid:0:2}/${bid:2}"
|
|
|
|
target="../../${binary#./}.debug"
|
|
ln -s "$target" "$dbgdir/.build-id/${bid:0:2}/${bid:2}.debug"
|
|
fi
|
|
fi
|
|
|
|
strip $@ "$binary"
|
|
}
|
|
|
|
|
|
tidy_strip() {
|
|
if check_option "strip" "y"; then
|
|
msg2 "$(gettext "Stripping unneeded symbols from binaries and libraries...")"
|
|
# make sure library stripping variables are defined to prevent excess stripping
|
|
[[ -z ${STRIP_SHARED+x} ]] && STRIP_SHARED="-S"
|
|
[[ -z ${STRIP_STATIC+x} ]] && STRIP_STATIC="-S"
|
|
|
|
if check_option "debug" "y"; then
|
|
|
|
dbgdir="$pkgdirbase/$pkgbase-@DEBUGSUFFIX@/usr/lib/debug"
|
|
dbgsrc="$pkgdirbase/$pkgbase-@DEBUGSUFFIX@${DBGSRCDIR:-/usr/src/debug}"
|
|
mkdir -p "$dbgdir" "$dbgsrc"
|
|
fi
|
|
|
|
local binary strip_flags
|
|
find . -type f -perm -u+w -print0 2>/dev/null | while read -rd '' binary ; do
|
|
case "$(file -bi "$binary")" in
|
|
*application/x-sharedlib*) # Libraries (.so)
|
|
strip_flags="$STRIP_SHARED";;
|
|
*application/x-archive*) # Libraries (.a)
|
|
strip_flags="$STRIP_STATIC";;
|
|
*application/x-object*)
|
|
case "$binary" in
|
|
*.ko) # Kernel module
|
|
strip_flags="$STRIP_SHARED";;
|
|
*)
|
|
continue;;
|
|
esac;;
|
|
*application/x-executable*) # Binaries
|
|
strip_flags="$STRIP_BINARIES";;
|
|
*)
|
|
continue ;;
|
|
esac
|
|
strip_file "$binary" ${strip_flags}
|
|
done
|
|
fi
|
|
}
|