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| Path : /usr/lib/rpm/ |
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| Current File : //usr/lib/rpm/find-debuginfo.sh |
#!/bin/bash
#find-debuginfo.sh - automagically generate debug info and file list
#for inclusion in an rpm spec file.
#
# Usage: find-debuginfo.sh [--strict-build-id] [-g]
# [-o debugfiles.list]
# [[-l filelist]... [-p 'pattern'] -o debuginfo.list]
# [builddir]
#
# The -g flag says to use strip -g instead of full strip on DSOs.
# The --strict-build-id flag says to exit with failure status if
# any ELF binary processed fails to contain a build-id note.
#
# A single -o switch before any -l or -p switches simply renames
# the primary output file from debugfiles.list to something else.
# A -o switch that follows a -p switch or some -l switches produces
# an additional output file with the debuginfo for the files in
# the -l filelist file, or whose names match the -p pattern.
# The -p argument is an egrep-style regexp matching the a file name,
# and must not use anchors (^ or $).
#
# All file names in switches are relative to builddir (. if not given).
#
# With -g arg, pass it to strip on libraries.
strip_g=false
# Barf on missing build IDs.
strict=false
BUILDDIR=.
out=debugfiles.list
nout=0
while [ $# -gt 0 ]; do
case "$1" in
--strict-build-id)
strict=true
;;
-g)
strip_g=true
;;
-o)
if [ -z "${lists[$nout]}" -a -z "${ptns[$nout]}" ]; then
out=$2
else
outs[$nout]=$2
((nout++))
fi
shift
;;
-l)
lists[$nout]="${lists[$nout]} $2"
shift
;;
-p)
ptns[$nout]=$2
shift
;;
*)
BUILDDIR=$1
shift
break
;;
esac
shift
done
i=0
while ((i < nout)); do
outs[$i]="$BUILDDIR/${outs[$i]}"
l=''
for f in ${lists[$i]}; do
l="$l $BUILDDIR/$f"
done
lists[$i]=$l
((++i))
done
LISTFILE="$BUILDDIR/$out"
SOURCEFILE="$BUILDDIR/debugsources.list"
LINKSFILE="$BUILDDIR/debuglinks.list"
> "$SOURCEFILE"
> "$LISTFILE"
> "$LINKSFILE"
debugdir="${RPM_BUILD_ROOT}/usr/lib/debug"
strip_to_debug()
{
local g=
$strip_g && case "$(file -bi "$2")" in
application/x-sharedlib*) g=-g ;;
esac
eu-strip --remove-comment $g -f "$1" "$2" || exit
chmod 444 "$1" || exit
}
# Make a relative symlink to $1 called $3$2
shopt -s extglob
link_relative()
{
local t="$1" f="$2" pfx="$3"
local fn="${f#/}" tn="${t#/}"
local fd td d
while fd="${fn%%/*}"; td="${tn%%/*}"; [ "$fd" = "$td" ]; do
fn="${fn#*/}"
tn="${tn#*/}"
done
d="${fn%/*}"
if [ "$d" != "$fn" ]; then
d="${d//+([!\/])/..}"
tn="${d}/${tn}"
fi
mkdir -p "$(dirname "$pfx$f")" && ln -snf "$tn" "$pfx$f"
}
# Make a symlink in /usr/lib/debug/$2 to $1
debug_link()
{
local l="/usr/lib/debug$2"
local t="$1"
echo >> "$LINKSFILE" "$l $t"
# this should correspond to what brp-symlink is doing
case $t in
/usr*)
link_relative "$t" "$l" "$RPM_BUILD_ROOT"
;;
*)
mkdir -p "$(dirname "$RPM_BUILD_ROOT$l")" && \
ln -snf "$t" "$RPM_BUILD_ROOT$l"
;;
esac
}
# Compare two binaries but ignore the .note.gnu.build-id section
elfcmp()
{
local tmp1=$(mktemp -t ${1##*/}.XXXXXX)
local tmp2=$(mktemp -t ${2##*/}.XXXXXX)
objcopy -R .note.gnu.build-id -R .gnu_debuglink $1 $tmp1
objcopy -R .note.gnu.build-id -R .gnu_debuglink $2 $tmp2
cmp -s $tmp1 $tmp2
local res=$?
rm -f $tmp1 $tmp2
return $res
}
# Make a build-id symlink for id $1 with suffix $3 to file $2.
make_id_link()
{
local id="$1" file="$2"
local idfile=".build-id/${id:0:2}/${id:2}"
[ $# -eq 3 ] && idfile="${idfile}$3"
local root_idfile="$RPM_BUILD_ROOT/usr/lib/debug/$idfile"
if [ ! -L "$root_idfile" ]; then
debug_link "$file" "/$idfile"
return
fi
[ $# -eq 3 ] && return 0
local other=$(readlink -m "$root_idfile")
other=${other#$RPM_BUILD_ROOT}
if cmp -s "$RPM_BUILD_ROOT$other" "$RPM_BUILD_ROOT$file" ||
elfcmp "$RPM_BUILD_ROOT$other" "$RPM_BUILD_ROOT$file" ; then
# Two copies. Maybe one has to be setuid or something.
echo >&2 "*** WARNING: identical binaries are copied, not linked:"
echo >&2 " $file"
echo >&2 " and $other"
else
# This is pathological, break the build.
echo >&2 "*** ERROR: same build ID in nonidentical files!"
echo >&2 " $file"
echo >&2 " and $other"
exit 2
fi
}
get_debugfn()
{
dn=$(dirname "${1#$RPM_BUILD_ROOT}")
# Do not strip existing .debug suffixes
bn=$(basename "$1").debug
debugdn=${debugdir}${dn}
debugfn=${debugdn}/${bn}
}
set -o pipefail
strict_error=ERROR
$strict || strict_error=WARNING
# Strip ELF binaries (and no static libraries)
find $RPM_BUILD_ROOT ! -path "${debugdir}/*.debug" -type f \( -perm +111 -or -name "*.so*" -or -name "*.ko" \) ! -name "*.a" -print0 | sort -z |
xargs --no-run-if-empty -0 stat -c '%h %D_%i %n' |
while read nlinks inum f; do
case $(objdump -h $f 2>/dev/null | egrep -o '(debug[\.a-z_]*|gnu.version)') in
*debuglink*) continue ;;
*debug*) ;;
*gnu.version*)
echo "WARNING: "`echo $f | sed -e "s,^$RPM_BUILD_ROOT/*,/,"`" is already stripped!"
continue
;;
*) continue ;;
esac
# double check that we really have an ELF file,
# to handle monodevelop-debugger-gdb and monodevelop-debugger-mdb
ftype=`/usr/bin/file $f | cut -d: -f2-`
case $ftype in
*ELF*) ;;
*)
echo "$f is not an ELF file, skipping"
continue
;;
esac
get_debugfn "$f"
[ -f "${debugfn}" ] && continue
# If this file has multiple links, keep track and make
# the corresponding .debug files all links to one file too.
if [ $nlinks -gt 1 ]; then
eval linked=\$linked_$inum
if [ -n "$linked" ]; then
link=$debugfn
get_debugfn "$linked"
echo "hard linked $link to $debugfn"
ln -nf "$debugfn" "$link"
continue
else
eval linked_$inum=\$f
echo "file $f has $[$nlinks - 1] other hard links"
fi
fi
echo "extracting debug info from $f"
mode=$(stat -c %a "$f")
chmod +w "$f"
id=$($(DEBUGEDIT=$(which debugedit 2>/dev/null); \
echo ${DEBUGEDIT:-/usr/lib/rpm/debugedit}) -b "$RPM_BUILD_DIR" \
-d /usr/src/debug -i -l "$SOURCEFILE" "$f") || exit
if [ -z "$id" ]; then
echo >&2 "*** ${strict_error}: No build ID note found in $f"
$strict && exit 2
fi
# A binary already copied into /usr/lib/debug doesn't get stripped,
# just has its file names collected and adjusted.
case "$dn" in
/usr/lib/debug/*)
[ -z "$id" ] || make_id_link "$id" "$dn/$(basename $f)"
continue ;;
esac
mkdir -p "${debugdn}"
objcopy --only-keep-debug $f $debugfn || :
(
shopt -s extglob
strip_option="--strip-all"
case "$f" in
*.ko)
strip_option="--strip-debug" ;;
*$STRIP_KEEP_SYMTAB*)
if test -n "$STRIP_KEEP_SYMTAB"; then
strip_option="--strip-debug"
fi
;;
esac
if test "$NO_DEBUGINFO_STRIP_DEBUG" = true ; then
strip_option=
fi
objcopy --add-gnu-debuglink=$debugfn -R .comment -R .GCC.command.line $strip_option $f
chmod $mode $f
) || :
if [ -n "$id" ]; then
make_id_link "$id" "$dn/$(basename $f)"
make_id_link "$id" "/usr/lib/debug$dn/$bn" .debug
fi
done || exit
# We used to make a .debug symlink for each symlink whose target
# has a .debug file to that file. This is not necessary because
# the debuglink section contains only the destination of those links.
# Creating those links anyway results in debuginfo packages for
# devel packages just because of the .so symlinks in them.
if [ -s "$SOURCEFILE" ]; then
mkdir -p "${RPM_BUILD_ROOT}/usr/src/debug"
LC_ALL=C sort -z -u "$SOURCEFILE" | egrep -v -z '(<internal>|<built-in>)$' |
(cd "$RPM_BUILD_DIR"; cpio -pd0mL "${RPM_BUILD_ROOT}/usr/src/debug")
# stupid cpio creates new directories in mode 0700, fixup
find "${RPM_BUILD_ROOT}/usr/src/debug" -type d -print0 |
xargs --no-run-if-empty -0 chmod a+rx
find "${RPM_BUILD_ROOT}/usr/src/debug" -type f -print0 |
xargs --no-run-if-empty -0 chmod a+r
fi
if [ -d "${RPM_BUILD_ROOT}/usr/lib" -o -d "${RPM_BUILD_ROOT}/usr/src" ]; then
((nout > 0)) ||
test ! -d "${RPM_BUILD_ROOT}/usr/lib" ||
(cd "${RPM_BUILD_ROOT}/usr/lib"; test ! -d debug || find debug -type d) |
sed 's,^,%dir /usr/lib/,' >> "$LISTFILE"
(cd "${RPM_BUILD_ROOT}/usr"
test ! -d lib/debug || find lib/debug ! -type d
) | sed 's,^,/usr/,' >> "$LISTFILE"
fi
: > "$SOURCEFILE"
if [ -d "${RPM_BUILD_ROOT}/usr/src" ]; then
(cd "${RPM_BUILD_ROOT}/usr"
test ! -d src/debug || find src/debug -mindepth 1 -maxdepth 1
) | sed 's,^,/usr/,' >> "$SOURCEFILE"
fi
# Append to $1 only the lines from stdin not already in the file.
append_uniq()
{
fgrep -f "$1" -x -v >> "$1"
}
# Helper to generate list of corresponding .debug files from a file list.
filelist_debugfiles()
{
local extra="$1"
shift
sed 's/^%[a-z0-9_][a-z0-9_]*([^)]*) *//
s/^%[a-z0-9_][a-z0-9_]* *//
/^$/d
'"$extra" "$@"
}
# Write an output debuginfo file list based on given input file lists.
filtered_list()
{
local out="$1"
shift
test $# -gt 0 || return
fgrep -f <(filelist_debugfiles 's,^.*$,/usr/lib/debug&.debug,' "$@") \
-x $LISTFILE >> $out
sed -n -f <(filelist_debugfiles 's/[\\.*+#]/\\&/g
h
s,^.*$,s# &$##p,p
g
s,^.*$,s# /usr/lib/debug&.debug$##p,p
' "$@") "$LINKSFILE" | append_uniq "$out"
}
# Write an output debuginfo file list based on an egrep-style regexp.
pattern_list()
{
local out="$1" ptn="$2"
test -n "$ptn" || return
egrep -x -e "$ptn" "$LISTFILE" >> "$out"
sed -n -r "\#^$ptn #s/ .*\$//p" "$LINKSFILE" | append_uniq "$out"
}
#
# When given multiple -o switches, split up the output as directed.
#
i=0
while ((i < nout)); do
> ${outs[$i]}
filtered_list ${outs[$i]} ${lists[$i]}
pattern_list ${outs[$i]} "${ptns[$i]}"
fgrep -vx -f ${outs[$i]} "$LISTFILE" > "${LISTFILE}.new"
mv "${LISTFILE}.new" "$LISTFILE"
((++i))
done
if ((nout > 0)); then
# Now add the right %dir lines to each output list.
(cd "${RPM_BUILD_ROOT}"; find usr/lib/debug -type d) |
sed 's#^.*$#\\@^/&/@{h;s@^.*$@%dir /&@p;g;}#' |
LC_ALL=C sort -ur > "${LISTFILE}.dirs.sed"
i=0
while ((i < nout)); do
sed -n -f "${LISTFILE}.dirs.sed" "${outs[$i]}" | sort -u > "${outs[$i]}.new"
cat "${outs[$i]}" >> "${outs[$i]}.new"
mv -f "${outs[$i]}.new" "${outs[$i]}"
((++i))
done
sed -n -f "${LISTFILE}.dirs.sed" "${LISTFILE}" | sort -u > "${LISTFILE}.new"
cat "$LISTFILE" >> "${LISTFILE}.new"
mv "${LISTFILE}.new" "$LISTFILE"
fi
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