diff options
Diffstat (limited to 'find-debuginfo.sh')
| -rwxr-xr-x | find-debuginfo.sh | 373 |
1 files changed, 330 insertions, 43 deletions
diff --git a/find-debuginfo.sh b/find-debuginfo.sh index 14c9f71..fec5d62 100755 --- a/find-debuginfo.sh +++ b/find-debuginfo.sh @@ -1,13 +1,26 @@ #!/bin/bash #find-debuginfo.sh - automagically generate debug info and file list #for inclusion in an rpm spec file. - -if [ -z "$1" ] ; then BUILDDIR="." -else BUILDDIR=$1 -fi - -LISTFILE=$BUILDDIR/debugfiles.list -SOURCEFILE=$BUILDDIR/debugsources.list +# +# 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 grep -E -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). +# debugedit=/usr/lib/rpm/debugedit if [ ! -x $debugedit ]; then @@ -17,49 +30,323 @@ if [ ! -x $debugedit ]; then fi fi +# 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" -echo -n > $SOURCEFILE +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 $t" + link_relative "$t" "$l" "$RPM_BUILD_ROOT" +} + +# 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#$RPM_BUILD_ROOT} + if cmp -s "$root_idfile" "$RPM_BUILD_ROOT$file" || + eu-elfcmp -q "$root_idfile" "$RPM_BUILD_ROOT$file" 2> /dev/null; 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}") + bn=$(basename "$1" .debug).debug + + debugdn=${debugdir}${dn} + debugfn=${debugdn}/${bn} +} + +set -o pipefail + +strict_error=ERROR +$strict || strict_error=WARNING [[ -n "$EXCLUDE_FROM_STRIP" ]] && \ EXCLUDE_REGEXP=`perl -e 'print "(", join("|", @ARGV), ")"' $EXCLUDE_FROM_STRIP` -# Strip ELF binaries and shared libs -for f in `find $RPM_BUILD_ROOT -path "${debugdir}" -prune -o -type f \( -perm -0100 -or -perm -0010 -or -perm -0001 \) -exec file {} \; | \ - sed -n -e 's/^\(.*\):[ ]*.*ELF.* \(executable\|shared object\).*, not stripped/\1/p'` +echo $EXCLUDE_REGEXP +# Strip ELF binaries +find "$RPM_BUILD_ROOT" ! -path "${debugdir}/*.debug" -type f \ + \( -perm -0100 -or -perm -0010 -or -perm -0001 \) \ + -print | +file -N -f - | sed -n -e 's/^\(.*\):[ ]*.*ELF.*, not stripped/\1/p' | +xargs --no-run-if-empty stat -c '%h %D_%i %n' | +while read nlinks inum f; do + [[ -n "$EXCLUDE_REGEXP" ]] && grep -E -q "$EXCLUDE_REGEXP" <<< "$f" && \ + continue + + get_debugfn "$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 $f" + id=$($debugedit -b "$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}" + if test -w "$f"; then + strip_to_debug "${debugfn}" "$f" + else + chmod u+w "$f" + strip_to_debug "${debugfn}" "$f" + chmod u-w "$f" + fi + + if [ -n "$id" ]; then + make_id_link "$id" "$dn/$(basename $f)" + make_id_link "$id" "/usr/lib/debug$dn/$bn" .debug + fi +done || exit + +# For each symlink whose target has a .debug file, +# make a .debug symlink to that file. +find $RPM_BUILD_ROOT ! -path "${debugdir}/*" -type l -print | +while read f do - [[ -n "$EXCLUDE_REGEXP" ]] && egrep -q "$EXCLUDE_REGEXP" <<< "$f" && \ - continue - - dn=$(dirname $f | sed -n -e "s#^$RPM_BUILD_ROOT##p") - bn=$(basename $f .debug).debug - - debugdn="${debugdir}${dn}" - debugfn="${debugdn}/${bn}" - [ -f "${debugfn}" ] && continue - - mkdir -p "${debugdn}" - echo extracting debug info from $f - $debugedit -b "$RPM_BUILD_DIR" -d /usr/src/debug -l "$SOURCEFILE" "$f" - if test -w "$f"; then - eu-strip -f "${debugfn}" "$f" || : - else - chmod u+w "$f" - eu-strip -f "${debugfn}" "$f" || : - chmod u-w "$f" - fi + t=$(readlink -m "$f").debug + f=${f#$RPM_BUILD_ROOT} + t=${t#$RPM_BUILD_ROOT} + if [ -f "$debugdir$t" ]; then + echo "symlinked /usr/lib/debug$t to /usr/lib/debug${f}.debug" + debug_link "/usr/lib/debug$t" "${f}.debug" + fi done -touch $LISTFILE -[[ -d ${debugdir} ]] && \ -find ${debugdir} -type f | sed -n -e "s#^$RPM_BUILD_ROOT##p" > $LISTFILE - -if [ -s $SOURCEFILE ]; then - mkdir -p ${RPM_BUILD_ROOT}/usr/src/debug - cat $SOURCEFILE | (cd $RPM_BUILD_DIR; LANG=C sort -z -u | cpio -pd0m ${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 -0 chmod a+rx - find ${RPM_BUILD_ROOT}/usr/src/debug -type f -print0 | xargs -0 -r chmod a+r - - find ${RPM_BUILD_ROOT}/usr/src/debug -mindepth 1 -maxdepth 1 | sed -n -e "s#^$RPM_BUILD_ROOT##p" >> $LISTFILE +if [ -s "$SOURCEFILE" ]; then + mkdir -p "${RPM_BUILD_ROOT}/usr/src/debug" + LC_ALL=C sort -z -u "$SOURCEFILE" | grep -E -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 +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"; find debug -type d) | + sed 's,^,%dir /usr/lib/,' >> "$LISTFILE" + + (cd "${RPM_BUILD_ROOT}/usr" + test ! -d lib/debug || find lib/debug ! -type d + test ! -d src/debug || find src/debug -mindepth 1 -maxdepth 1 + ) | sed 's,^,/usr/,' >> "$LISTFILE" +fi + +# Append to $1 only the lines from stdin not already in the file. +append_uniq() +{ + grep -F -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 $# -gt 0 || return + grep -F -f <(filelist_debugfiles 's,^.*$,/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 grep -E -style regexp. +pattern_list() +{ + local out="$1" ptn="$2" + test -n "$ptn" || return + grep -E -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]}" + grep -Fvx -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 |