335 lines
8.2 KiB
Bash
335 lines
8.2 KiB
Bash
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#!/bin/bash
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#find-debuginfo.sh - automagically generate debug info and file list
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#for inclusion in an rpm spec file.
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#
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# Usage: find-debuginfo.sh [-g] [--strict-build-id]
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# [-o debugfiles.list]
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# [[-l filelist]... [-p 'pattern'] -o debuginfo.list]
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# [builddir]
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#
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# The -g flag says to use strip -g instead of full strip on DSOs.
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# The --strict-build-id flag says to exit with failure status if
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# any ELF binary processed fails to contain a build-id note.
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#
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# A single -o switch before any -l or -p switches simply renames
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# the primary output file from debugfiles.list to something else.
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# A -o switch that follows a -p switch or some -l switches produces
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# an additional output file with the debuginfo for the files in
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# the -l filelist file, or whose names match the -p pattern.
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# The -p argument is an egrep-style regexp matching the a file name,
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# and must not use anchors (^ or $).
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#
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# All file names in switches are relative to builddir (. if not given).
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#
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# With -g arg, pass it to strip on libraries.
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strip_g=false
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# Barf on missing build IDs.
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# XXX temporarily on by default
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strict=true
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BUILDDIR=.
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out=debugfiles.list
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nout=0
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while [ $# -gt 0 ]; do
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case "$1" in
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--strict-build-id)
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strict=true
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;;
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-g)
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strip_g=true
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;;
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-o)
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if [ -z "${lists[$nout]}" -a -z "${ptns[$nout]}" ]; then
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out=$2
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else
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outs[$nout]=$2
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((nout++))
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fi
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shift
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;;
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-l)
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lists[$nout]="${lists[$nout]} $2"
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shift
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;;
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-p)
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ptns[$nout]=$2
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shift
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;;
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*)
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BUILDDIR=$1
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shift
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break
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;;
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esac
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shift
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done
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i=0
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while ((i < nout)); do
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outs[$i]="$BUILDDIR/${outs[$i]}"
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l=''
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for f in ${lists[$i]}; do
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l="$l $BUILDDIR/$f"
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done
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lists[$i]=$l
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((++i))
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done
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LISTFILE=$BUILDDIR/$out
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SOURCEFILE=$BUILDDIR/debugsources.list
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LINKSFILE=$BUILDDIR/debuglinks.list
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> $SOURCEFILE
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> $LISTFILE
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> $LINKSFILE
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debugdir="${RPM_BUILD_ROOT}/usr/lib/debug"
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strip_to_debug()
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{
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local g=
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$strip_g && case "$(file -bi "$2")" in
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application/x-sharedlib,*) g=-g ;;
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esac
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eu-strip --remove-comment -f "$1" "$2" || exit
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}
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# Make a relative symlink to $1 called $3$2
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shopt -s extglob
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link_relative()
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{
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local t="$1" f="$2" pfx="$3"
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local fn="${f#/}" tn="${t#/}"
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local fd td d
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while fd="${fn%%/*}"; td="${tn%%/*}"; [ "$fd" = "$td" ]; do
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fn="${fn#*/}"
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tn="${tn#*/}"
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done
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d="${fn%/*}"
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if [ "$d" != "$fn" ]; then
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d="${d//+([!\/])/..}"
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tn="${d}/${tn}"
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fi
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mkdir -p "$(dirname "$pfx$f")" && ln -snf "$tn" "$pfx$f"
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}
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# Make a symlink in /usr/lib/debug/$2 to $1
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debug_link()
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{
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local l="/usr/lib/debug$2"
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local t="$1"
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echo >> $LINKSFILE "$l $t"
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link_relative "$t" "$l" "$RPM_BUILD_ROOT"
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}
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# Make a build-id symlink for id $1 with suffix $3 to file $2.
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make_id_link()
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{
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local id="$1" file="$2"
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local idfile=".build-id/${id:0:2}/${id:2}"
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[ $# -eq 3 ] && idfile="${idfile}$3"
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local root_idfile="$RPM_BUILD_ROOT/usr/lib/debug/$idfile"
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if [ ! -L "$root_idfile" ]; then
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debug_link "$file" "/$idfile"
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return
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fi
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[ $# -eq 3 ] && return 0
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local other=$(readlink -m "$root_idfile")
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other=${other#$RPM_BUILD_ROOT}
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if cmp -s "$root_idfile" "$RPM_BUILD_ROOT$file" ||
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eu-elfcmp -q "$root_idfile" "$RPM_BUILD_ROOT$file" 2> /dev/null; then
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# Two copies. Maybe one has to be setuid or something.
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echo >&2 "*** WARNING: identical binaries are copied, not linked:"
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echo >&2 " $file"
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echo >&2 " and $other"
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else
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# This is pathological, break the build.
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echo >&2 "*** ERROR: same build ID in nonidentical files!"
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echo >&2 " $file"
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echo >&2 " and $other"
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exit 2
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fi
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}
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get_debugfn()
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{
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dn=$(dirname "${1#$RPM_BUILD_ROOT}")
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bn=$(basename "$1" .debug).debug
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debugdn=${debugdir}${dn}
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debugfn=${debugdn}/${bn}
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}
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set -o pipefail
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strict_error=ERROR
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$strict || strict_error=WARNING
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# Strip ELF binaries
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find $RPM_BUILD_ROOT ! -path "${debugdir}/*.debug" -type f \
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\( -perm -0100 -or -perm -0010 -or -perm -0001 \) \
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-print |
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file -N -f - | sed -n -e 's/^\(.*\):[ ]*.*ELF.*, not stripped/\1/p' |
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xargs stat -c '%h %D_%i %n' |
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while read nlinks inum f; do
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get_debugfn "$f"
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[ -f "${debugfn}" ] && continue
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# If this file has multiple links, keep track and make
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# the corresponding .debug files all links to one file too.
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if [ $nlinks -gt 1 ]; then
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eval linked=\$linked_$inum
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if [ -n "$linked" ]; then
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link=$debugfn
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get_debugfn "$linked"
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echo "hard linked $link to $debugfn"
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ln -nf "$debugfn" "$link"
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continue
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else
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eval linked_$inum=\$f
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echo "file $f has $[$nlinks - 1] other hard links"
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fi
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fi
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echo "extracting debug info from $f"
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id=$(/usr/lib/rpm/debugedit -b "$RPM_BUILD_DIR" -d /usr/src/debug \
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-i -l "$SOURCEFILE" "$f") || exit
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if [ -z "$id" ]; then
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echo >&2 "*** ${strict_error}: No build ID note found in $f"
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$strict && exit 2
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fi
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# A binary already copied into /usr/lib/debug doesn't get stripped,
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# just has its file names collected and adjusted.
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case "$dn" in
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/usr/lib/debug/*)
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[ -z "$id" ] || make_id_link "$id" "$dn/$(basename $f)"
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continue ;;
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esac
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mkdir -p "${debugdn}"
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if test -w "$f"; then
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strip_to_debug "${debugfn}" "$f"
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else
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chmod u+w "$f"
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strip_to_debug "${debugfn}" "$f"
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chmod u-w "$f"
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fi
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if [ -n "$id" ]; then
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make_id_link "$id" "$dn/$(basename $f)"
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make_id_link "$id" "/usr/lib/debug$dn/$bn" .debug
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fi
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done || exit
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# For each symlink whose target has a .debug file,
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# make a .debug symlink to that file.
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find $RPM_BUILD_ROOT ! -path "${debugdir}/*" -type l -print |
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while read f
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do
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t=$(readlink -m "$f").debug
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f=${f#$RPM_BUILD_ROOT}
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t=${t#$RPM_BUILD_ROOT}
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if [ -f "$debugdir$t" ]; then
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echo "symlinked /usr/lib/debug$t to /usr/lib/debug${f}.debug"
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debug_link "/usr/lib/debug$t" "${f}.debug"
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fi
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done
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mkdir -p ${RPM_BUILD_ROOT}/usr/src/debug
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LC_ALL=C sort -z -u $SOURCEFILE | egrep -v -z '(<internal>|<built-in>)$' |
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(cd $RPM_BUILD_DIR; cpio -pd0mL ${RPM_BUILD_ROOT}/usr/src/debug)
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# stupid cpio creates new directories in mode 0700, fixup
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find ${RPM_BUILD_ROOT}/usr/src/debug -type d -print0 | xargs -0 chmod a+rx
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gendirs=src
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((nout > 0)) || gendirs='lib src'
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for d in $gendirs; do
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(cd ${RPM_BUILD_ROOT}/usr/$d; find debug -type d) |
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sed "s,^,%dir /usr/$d/," >> $LISTFILE
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done
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(cd ${RPM_BUILD_ROOT}/usr
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find lib/debug ! -type d
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find src/debug -mindepth 1 -maxdepth 1
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) | sed 's,^,/usr/,' >> $LISTFILE
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# Append to $1 only the lines from stdin not already in the file.
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append_uniq()
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{
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fgrep -f "$1" -x -v >> "$1"
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}
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# Helper to generate list of corresponding .debug files from a file list.
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filelist_debugfiles()
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{
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local extra="$1"
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shift
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sed 's/^%[a-z0-9_][a-z0-9_]*([^)]*) *//
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s/^%[a-z0-9_][a-z0-9_]* *//
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/^$/d
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'"$extra" "$@"
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}
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# Write an output debuginfo file list based on given input file lists.
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filtered_list()
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{
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local out="$1"
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shift
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test $# -gt 0 || return
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fgrep -f <(filelist_debugfiles 's,^.*$,/usr/lib/debug&.debug,' "$@") \
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-x $LISTFILE >> $out
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sed -n -f <(filelist_debugfiles 's/[\\.*+#]/\\&/g
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h
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s,^.*$,s# &$##p,p
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g
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s,^.*$,s# /usr/lib/debug&.debug$##p,p
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' "$@") $LINKSFILE | append_uniq "$out"
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}
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# Write an output debuginfo file list based on an egrep-style regexp.
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pattern_list()
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{
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local out="$1" ptn="$2"
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test -n "$ptn" || return
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egrep -x -e "$ptn" $LISTFILE >> $out
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sed -n -r "\#^$ptn #s/ .*\$//p" $LINKSFILE | append_uniq "$out"
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}
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#
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# When given multiple -o switches, split up the output as directed.
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#
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i=0
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while ((i < nout)); do
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> ${outs[$i]}
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filtered_list ${outs[$i]} ${lists[$i]}
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pattern_list ${outs[$i]} "${ptns[$i]}"
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fgrep -vx -f ${outs[$i]} $LISTFILE > ${LISTFILE}.new
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mv ${LISTFILE}.new $LISTFILE
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((++i))
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done
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if ((nout > 0)); then
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# Now add the right %dir lines to each output list.
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(cd ${RPM_BUILD_ROOT}; find usr/{lib,src}/debug -type d) |
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sed 's#^.*$#\\@^/&/@{h;s@^.*$@%dir /&@p;g;}#' |
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LC_ALL=C sort -ur > ${LISTFILE}.dirs.sed
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i=0
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while ((i < nout)); do
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sed -n -f ${LISTFILE}.dirs.sed ${outs[$i]} | sort -u > ${outs[$i]}.new
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cat ${outs[$i]} >> ${outs[$i]}.new
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mv -f ${outs[$i]}.new ${outs[$i]}
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((++i))
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done
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sed -n -f ${LISTFILE}.dirs.sed ${LISTFILE} | sort -u > ${LISTFILE}.new
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cat $LISTFILE >> ${LISTFILE}.new
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mv ${LISTFILE}.new $LISTFILE
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fi
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