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412 lines
11 KiB
412 lines
11 KiB
#!/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 [--strict-build-id] [-g] [-r] |
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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 or EXEs. |
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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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# The -r flag says to use eu-strip --reloc-debug-sections. |
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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 grep -E -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 or executables. |
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strip_g=false |
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# with -r arg, pass --reloc-debug-sections to eu-strip. |
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strip_r=false |
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# Barf on missing build IDs. |
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strict=false |
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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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-r) |
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strip_r=true |
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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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local r= |
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$strip_r && r=--reloc-debug-sections |
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$strip_g && case "$(file -bi "$2")" in |
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application/x-sharedlib*) g=-g ;; |
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application/x-executable*) g=-g ;; |
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esac |
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eu-strip --remove-comment $r $g -f "$1" "$2" || exit |
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chmod 444 "$1" || 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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# Provide .2, .3, ... symlinks to all filename instances of this build-id. |
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make_id_dup_link() |
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{ |
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local id="$1" file="$2" idfile |
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local n=1 |
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while true; do |
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idfile=".build-id/${id:0:2}/${id:2}.$n" |
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[ $# -eq 3 ] && idfile="${idfile}$3" |
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if [ ! -L "$RPM_BUILD_ROOT/usr/lib/debug/$idfile" ]; then |
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break |
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fi |
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n=$[$n+1] |
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done |
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debug_link "$file" "/$idfile" |
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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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make_id_dup_link "$@" |
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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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[ "$dn" == "." ] && dn="" |
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bn=$(basename "$1" .so).debug |
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bn=$(basename "$bn" .debug).debug |
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debugdn=${debugdir}${dn} |
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debugfn=${debugdn}/${bn} |
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[ -n "$2" ] && shadowfn=$(basename "$2") |
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} |
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set -o pipefail |
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strict_error=ERROR |
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$strict || strict_error=WARNING |
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handle_single_file() |
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{ |
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nlinks=$1 && shift |
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inum=$1 && shift |
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f=$1 && shift |
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shadow=$1 && shift |
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zf="$f" |
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[ -n "${shadowfn}" ] && zf="${shadowfn}" |
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get_debugfn "$f" "$shadow" |
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[ -f "${debugfn}" ] && return |
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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 "$linked" ]; then |
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eval id=\$linkedid_$inum |
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make_id_dup_link "$id" "$dn/$(basename ${zf})" |
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make_id_dup_link "$id" "/usr/lib/debug$dn/$bn" .debug |
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link=$debugfn |
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get_debugfn "$linked" |
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echo "hard linked $link to $debugfn" |
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mkdir -p "$(dirname "$link")" && ln -nf "$debugfn" "$link" |
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return |
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else |
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eval linked_$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 $f" |
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echo /usr/lib/rpm/debugedit -b "$RPM_BUILD_DIR" -d /usr/src/debug \ |
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-i -l "$SOURCEFILE" "$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 [ $nlinks -gt 1 ]; then |
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eval linkedid_$inum=\$id |
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fi |
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if [ -z "$id" ]; then |
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echo >&2 "*** ${strict_error}: No build ID note found in $zf" |
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$strict && exit 2 |
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fi |
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[ -x /usr/bin/gdb-add-index ] && /usr/bin/gdb-add-index "$zf" > /dev/null 2>&1 |
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# A binary already copied into /usr/lib/debug doesn't get stripped, |
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# just has its file names collected and adjusted. |
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case "$dn" in |
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/usr/lib/debug/*) |
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[ -z "$id" ] || make_id_link "$id" "$dn/$(basename $zf)" |
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return ;; |
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esac |
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mkdir -p "${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 ${zf})" |
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make_id_link "$id" "/usr/lib/debug$dn/$bn" .debug |
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fi |
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} |
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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 --no-run-if-empty stat -c '%h %D_%i %n' | |
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while read nlinks inum f; do |
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handle_single_file $nlinks $inum $f |
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done || exit |
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find "$RPM_BUILD_ROOT" ! -path "${debugdir}/*.debug" -type f \ |
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-iname '*.efi' -print | |
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file -N -f - | sed -n -e 's/^\(.*\):[ ]*.*PE32.*EFI .*/\1/p' | |
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xargs --no-run-if-empty stat -c '%h %D_%i %n' | |
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while read nlinks inum f; do |
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[ -f "$f" ] || continue |
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[ -f "${f%%.efi}.so" ] || continue |
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handle_single_file $nlinks $inum ${f%%.efi}.so $f |
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done || exit |
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# On Aarch64 file tells us "MS-DOS" instead of PE32+. Why not. |
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find "$RPM_BUILD_ROOT" ! -path "${debugdir}/*.debug" -type f \ |
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-iname '*.efi' -print | |
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file -N -f - | sed -n -e 's/^\(.*\):[ ]MS-DOS.*/\1/p' | |
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xargs --no-run-if-empty stat -c '%h %D_%i %n' | |
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while read nlinks inum f; do |
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[ -f "$f" ] || continue |
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[ -f "${f%%.efi}.so" ] || continue |
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handle_single_file $nlinks $inum ${f%%.efi}.so $f |
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done || exit |
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# For each symlink whose target has a .debug file, |
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# make a .debug symlink to that file. |
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find "$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" "${f}.debug" |
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fi |
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done |
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if [ -s "$SOURCEFILE" ]; then |
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mkdir -p "${RPM_BUILD_ROOT}/usr/src/debug" |
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LC_ALL=C sort -z -u "$SOURCEFILE" | grep -E -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 | |
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xargs --no-run-if-empty -0 chmod a+rx |
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fi |
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if [ -d "${RPM_BUILD_ROOT}/usr/lib" -o -d "${RPM_BUILD_ROOT}/usr/src" ]; then |
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((nout > 0)) || |
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test ! -d "${RPM_BUILD_ROOT}/usr/lib" || |
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(cd "${RPM_BUILD_ROOT}/usr/lib"; find debug -type d) | |
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sed 's,^,%dir /usr/lib/,' >> "$LISTFILE" |
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(cd "${RPM_BUILD_ROOT}/usr" |
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test ! -d lib/debug || find lib/debug ! -type d |
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test ! -d src/debug || find src/debug -mindepth 1 -maxdepth 1 |
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) | sed 's,^,/usr/,' >> "$LISTFILE" |
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fi |
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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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grep -F -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 $# -gt 0 || return |
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grep -F -f <(filelist_debugfiles 's,^.*$,/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 grep -E -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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grep -E -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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grep -Fvx -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 "${RPM_BUILD_ROOT}"; find usr/lib/debug -type d) | |
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sed 's#^.*$#\\@^/&/@{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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