2 #find-debuginfo.sh - automagically generate debug info and file list
3 #for inclusion in an rpm spec file.
5 # Usage: find-debuginfo.sh [--strict-build-id] [--strip-disable] [--strip-option] [-g] [-r]
7 # [[-l filelist]... [-p 'pattern'] -o debuginfo.list]
10 # The -g flag says to use strip -g instead of full strip on DSOs.
11 # The --strict-build-id flag says to exit with failure status if
12 # any ELF binary processed fails to contain a build-id note.
13 # The -r flag says to use eu-strip --reloc-debug-sections.
15 # A single -o switch before any -l or -p switches simply renames
16 # the primary output file from debugfiles.list to something else.
17 # A -o switch that follows a -p switch or some -l switches produces
18 # an additional output file with the debuginfo for the files in
19 # the -l filelist file, or whose names match the -p pattern.
20 # The -p argument is an grep -E -style regexp matching the a file name,
21 # and must not use anchors (^ or $).
23 # All file names in switches are relative to builddir (. if not given).
26 # With -g arg, pass it to strip on libraries.
29 # with -r arg, pass --reloc-debug-sections to eu-strip.
32 # Barf on missing build IDs.
35 # With --strip-disable arg, no strip
38 # With --strip-option arg, this will be used as arg. of eu-strip
41 # With --strip-option arg for ko file, this will be used as arg. of eu-strip
47 while [ $# -gt 0 ]; do
56 strip_option=$(echo $1 | sed 's/--strip-option=//')
59 strip_ko_option=$(echo $1 | sed 's/--strip-ko-option=//')
65 if [ -z "${lists[$nout]}" -a -z "${ptns[$nout]}" ]; then
74 lists[$nout]="${lists[$nout]} $2"
94 while ((i < nout)); do
95 outs[$i]="$BUILDDIR/${outs[$i]}"
97 for f in ${lists[$i]}; do
104 LISTFILE="$BUILDDIR/$out"
105 SOURCEFILE="$BUILDDIR/debugsources.list"
106 LINKSFILE="$BUILDDIR/debuglinks.list"
112 debugdir="${RPM_BUILD_ROOT}/usr/lib/debug"
113 tooldir=$(rpm --eval %{_rpmconfigdir})
120 if test "$strip_disable" = true ; then
124 $strip_r && r=--reloc-debug-sections
125 $strip_g && case "$(file -bi "$2")" in
126 application/x-sharedlib*) g=-g ;;
131 # don't attempt to create a minimal backtrace binary for
132 # kernel modules as this just causes the stripping process
133 # to be skipped entirely
134 eu-strip --remove-comment $r $strip_ko_option -f "$1" "$2" || exit
137 # Support an alternative way to choose between strip (binutils) and
138 # eu-strip (elfutils) to handle a large shared object (e.g. chromium)
139 if [ "$STRIP_DEFAULT_PACKAGE" != "binutils" ]; then
140 eu-strip --remove-comment $g $strip_option -f "$1" "$2" || exit
143 strip --remove-section=.comment $g $strip_option -o "$2" "$1" || exit
146 chmod 444 "$1" || exit
149 # Make a relative symlink to $1 called $3$2
153 local t="$1" f="$2" pfx="$3"
154 local fn="${f#/}" tn="${t#/}"
157 while fd="${fn%%/*}"; td="${tn%%/*}"; [ "$fd" = "$td" ]; do
163 if [ "$d" != "$fn" ]; then
164 d="${d//+([!\/])/..}"
168 mkdir -p "$(dirname "$pfx$f")" && ln -snf "$tn" "$pfx$f"
171 # Make a symlink in /usr/lib/debug/$2 to $1
174 local l="/usr/lib/debug$2"
176 echo >> "$LINKSFILE" "$l $t"
178 # this should correspond to what brp-symlink is doing
181 link_relative "$t" "$l" "$RPM_BUILD_ROOT"
185 link_relative "$t" "$l" "$RPM_BUILD_ROOT"
187 mkdir -p "$(dirname "$RPM_BUILD_ROOT$l")" && \
188 ln -snf "$t" "$RPM_BUILD_ROOT$l"
194 # Provide .2, .3, ... symlinks to all filename instances of this build-id.
197 # See https://bugzilla.redhat.com/show_bug.cgi?id=641377 for the reasoning,
198 # but it has seveal drawbacks as we would need to split the .1 suffixes into
199 # different subpackages and it's about impossible to predict the number
202 local id="$1" file="$2" idfile
206 idfile=".build-id/${id:0:2}/${id:2}.$n"
207 [ $# -eq 3 ] && idfile="${idfile}$3"
208 if [ ! -L "$RPM_BUILD_ROOT/usr/lib/debug/$idfile" ]; then
213 debug_link "$file" "/$idfile"
216 # Compare two binaries but ignore the .note.gnu.build-id section
219 local tmp1=$(mktemp -t ${1##*/}.XXXXXX)
220 local tmp2=$(mktemp -t ${2##*/}.XXXXXX)
222 objcopy -R .note.gnu.build-id -R .gnu_debuglink $1 $tmp1
223 objcopy -R .note.gnu.build-id -R .gnu_debuglink $2 $tmp2
230 # Make a build-id symlink for id $1 with suffix $3 to file $2.
233 local id="$1" file="$2"
234 local idfile=".build-id/${id:0:2}/${id:2}"
235 [ $# -eq 3 ] && idfile="${idfile}$3"
236 local root_idfile="$RPM_BUILD_ROOT/usr/lib/debug/$idfile"
238 if [ ! -L "$root_idfile" ]; then
239 debug_link "$file" "/$idfile"
243 make_id_dup_link "$@"
245 [ $# -eq 3 ] && return 0
247 local other=$(readlink -m "$root_idfile")
248 other=${other#$RPM_BUILD_ROOT}
249 if cmp -s "$RPM_BUILD_ROOT$other" "$RPM_BUILD_ROOT$file" ||
250 elfcmp "$RPM_BUILD_ROOT$other" "$RPM_BUILD_ROOT$file" ; then
251 # Two copies. Maybe one has to be setuid or something.
252 echo >&2 "*** WARNING: identical binaries are copied, not linked:"
254 echo >&2 " and $other"
256 # This is pathological, break the build.
257 echo >&2 "*** ERROR: same build ID in nonidentical files!"
259 echo >&2 " and $other"
266 dn=$(dirname "${1#$RPM_BUILD_ROOT}")
267 # Do not strip existing .debug suffixes
268 bn=$(basename "$1").debug
270 debugdn=${debugdir}${dn}
271 debugfn=${debugdn}/${bn}
277 $strict || strict_error=WARNING
279 # Strip ELF binaries (and no static libraries)
280 find $RPM_BUILD_ROOT ! -path "${debugdir}/*.debug" -type f \( -perm /111 -or -name "*.so*" -or -name "*.ko" \) ! -name "*.a" -print0 | sort -z |
281 xargs --no-run-if-empty -0 stat -c '%h %D_%i %n' |
282 while read nlinks inum f; do
283 case $(objdump -h $f 2>/dev/null | egrep -o '(debug[\.a-z_]*|gnu.version)') in
284 *debuglink*) continue ;;
287 echo "WARNING: "`echo $f | sed -e "s,^$RPM_BUILD_ROOT/*,/,"`" is already stripped!"
293 [ -f "${debugfn}" ] && continue
295 # If this file has multiple links, keep track and make
296 # the corresponding .debug files all links to one file too.
297 if [ $nlinks -gt 1 ]; then
298 eval linked=\$linked_$inum
299 if [ -n "$linked" ]; then
300 eval id=\$linkedid_$inum
301 make_id_dup_link "$id" "$dn/$(basename $f)"
302 make_id_dup_link "$id" "/usr/lib/debug$dn/$bn" .debug
304 get_debugfn "$linked"
305 echo "hard linked $link to $debugfn"
306 mkdir -p "$(dirname "$link")" && ln -nf "$debugfn" "$link"
309 eval linked_$inum=\$f
310 echo "file $f has $[$nlinks - 1] other hard links"
314 echo "extracting debug info from $f"
315 id=$($(DEBUGEDIT=$(which debugedit 2>/dev/null); \
316 echo ${DEBUGEDIT:-${tooldir}/debugedit}) -b "$RPM_BUILD_DIR" \
317 -d /usr/src/debug -i -l "$SOURCEFILE" "$f") || exit
318 if [ $nlinks -gt 1 ]; then
319 eval linkedid_$inum=\$id
321 if [ -z "$id" ]; then
322 echo >&2 "*** ${strict_error}: No build ID note found in $f"
326 [ -x /usr/bin/gdb-add-index ] && /usr/bin/gdb-add-index "$f" > /dev/null 2>&1
328 # A binary already copied into /usr/lib/debug doesn't get stripped,
329 # just has its file names collected and adjusted.
332 [ -z "$id" ] || make_id_link "$id" "$dn/$(basename $f)"
336 mkdir -p "${debugdn}"
337 if [ -e "${BUILDDIR}/Kconfig" ] ; then
338 mode=$(stat -c %a "$f")
340 objcopy --only-keep-debug $f $debugfn || :
343 strip_option="--strip-all"
346 strip_option="--strip-debug" ;;
347 *$STRIP_KEEP_SYMTAB*)
348 if test -n "$STRIP_KEEP_SYMTAB"; then
349 strip_option="--strip-debug"
353 if test "$NO_DEBUGINFO_STRIP_DEBUG" = true ; then
356 if test "$strip_disable" = true ; then
359 objcopy --add-gnu-debuglink=$debugfn -R .comment -R .GCC.command.line $strip_option $f
363 if test -w "$f"; then
364 strip_to_debug "${debugfn}" "$f"
367 strip_to_debug "${debugfn}" "$f"
372 if [ -n "$id" ]; then
373 make_id_link "$id" "$dn/$(basename $f)"
374 make_id_link "$id" "/usr/lib/debug$dn/$bn" .debug
378 # We used to make a .debug symlink for each symlink whose target
379 # has a .debug file to that file. This is not necessary because
380 # the debuglink section contains only the destination of those links.
381 # Creating those links anyway results in debuginfo packages for
382 # devel packages just because of the .so symlinks in them.
384 if [ -s "$SOURCEFILE" ]; then
385 mkdir -p "${RPM_BUILD_ROOT}/usr/src/debug"
386 LC_ALL=C sort -z -u "$SOURCEFILE" | grep -E -v -z '(<internal>|<built-in>)$' |
387 (cd "$RPM_BUILD_DIR"; cpio -pd0mL "${RPM_BUILD_ROOT}/usr/src/debug")
388 # stupid cpio creates new directories in mode 0700, fixup
389 find "${RPM_BUILD_ROOT}/usr/src/debug" -type d -print0 |
390 xargs --no-run-if-empty -0 chmod a+rx
391 find "${RPM_BUILD_ROOT}/usr/src/debug" -type f -print0 |
392 xargs --no-run-if-empty -0 chmod a+r
395 if [ -d "${RPM_BUILD_ROOT}/usr/lib" -o -d "${RPM_BUILD_ROOT}/usr/src" ]; then
397 test ! -d "${RPM_BUILD_ROOT}/usr/lib" ||
398 (cd "${RPM_BUILD_ROOT}/usr/lib"; test ! -d debug || find debug -type d) |
399 sed 's,^,%dir /usr/lib/,' >> "$LISTFILE"
401 (cd "${RPM_BUILD_ROOT}/usr"
402 test ! -d lib/debug || find lib/debug ! -type d
403 ) | sed 's,^,/usr/,' >> "$LISTFILE"
407 if [ -d "${RPM_BUILD_ROOT}/usr/src" ]; then
408 (cd "${RPM_BUILD_ROOT}/usr"
409 test ! -d src/debug || find src/debug -mindepth 1 -maxdepth 1
410 ) | sed 's,^,/usr/,' >> "$SOURCEFILE"
413 # Append to $1 only the lines from stdin not already in the file.
416 grep -F -f "$1" -x -v >> "$1"
419 # Helper to generate list of corresponding .debug files from a file list.
420 filelist_debugfiles()
424 sed 's/^%[a-z0-9_][a-z0-9_]*([^)]*) *//
425 s/^%[a-z0-9_][a-z0-9_]* *//
430 # Write an output debuginfo file list based on given input file lists.
435 test $# -gt 0 || return
436 grep -F -f <(filelist_debugfiles 's,^.*$,/usr/lib/debug&.debug,' "$@") \
438 sed -n -f <(filelist_debugfiles 's/[\\.*+#]/\\&/g
442 s,^.*$,s# /usr/lib/debug&.debug$##p,p
443 ' "$@") "$LINKSFILE" | append_uniq "$out"
446 # Write an output debuginfo file list based on an grep -E -style regexp.
449 local out="$1" ptn="$2"
450 test -n "$ptn" || return
451 grep -E -x -e "$ptn" "$LISTFILE" >> "$out"
452 sed -n -r "\#^$ptn #s/ .*\$//p" "$LINKSFILE" | append_uniq "$out"
456 # When given multiple -o switches, split up the output as directed.
459 while ((i < nout)); do
461 filtered_list ${outs[$i]} ${lists[$i]}
462 pattern_list ${outs[$i]} "${ptns[$i]}"
463 grep -Fvx -f ${outs[$i]} "$LISTFILE" > "${LISTFILE}.new"
464 mv "${LISTFILE}.new" "$LISTFILE"
467 if ((nout > 0)); then
468 # Now add the right %dir lines to each output list.
469 (cd "${RPM_BUILD_ROOT}"; find usr/lib/debug -type d) |
470 sed 's#^.*$#\\@^/&/@{h;s@^.*$@%dir /&@p;g;}#' |
471 LC_ALL=C sort -ur > "${LISTFILE}.dirs.sed"
473 while ((i < nout)); do
474 sed -n -f "${LISTFILE}.dirs.sed" "${outs[$i]}" | sort -u > "${outs[$i]}.new"
475 cat "${outs[$i]}" >> "${outs[$i]}.new"
476 mv -f "${outs[$i]}.new" "${outs[$i]}"
479 sed -n -f "${LISTFILE}.dirs.sed" "${LISTFILE}" | sort -u > "${LISTFILE}.new"
480 cat "$LISTFILE" >> "${LISTFILE}.new"
481 mv "${LISTFILE}.new" "$LISTFILE"