Attachment 316 Details for Bug 1552 – find-debuginfo.sh

find-debuginfo.sh

find-debuginfo.sh (text/x-sh), 14.42 KB, created by 云霭 on 2022-06-29 17:09:35 UTC

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Creator: 云霭

Created: 2022-06-29 17:09:35 UTC

Size: 14.42 KB

patch

obsolete

>#!/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] [-r] [-m]
>#			   [--g-libs]
>#	 		   [-o debugfiles.list]
>#			   [--run-dwz] [--dwz-low-mem-die-limit N]
>#			   [--dwz-max-die-limit N]
>#			   [[-l filelist]... [-p 'pattern'] -o debuginfo.list]
>#			   [builddir]
>#
># The -g flag says to use strip -g instead of full strip on DSOs or EXEs.
># The --g-libs flag says to use strip -g instead of full strip ONLY on DSOs.
># Options -g and --g-libs are mutually exclusive.
># The --strict-build-id flag says to exit with failure status if
># any ELF binary processed fails to contain a build-id note.
># The -r flag says to use eu-strip --reloc-debug-sections.
>#
># 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 $).
>#
># The --run-dwz flag instructs find-debuginfo.sh to run the dwz utility
># if available, and --dwz-low-mem-die-limit and --dwz-max-die-limit
># provide detailed limits.  See dwz(1) -l and -L option for details.
>#
># All file names in switches are relative to builddir (. if not given).
>#
>
># With -g arg, pass it to strip on libraries or executables.
>strip_g=false
>
># With --g-libs arg, pass it to strip on libraries.
>strip_glibs=false
>
># with -r arg, pass --reloc-debug-sections to eu-strip.
>strip_r=false
>
># with -m arg, add minimal debuginfo to binary.
>include_minidebug=false
>
># Barf on missing build IDs.
>strict=false
>
># DWZ parameters.
>run_dwz=false
>dwz_low_mem_die_limit=
>dwz_max_die_limit=
>
>BUILDDIR=.
>out=debugfiles.list
>nout=0
>while [ $# -gt 0 ]; do
>  case "$1" in
>  --strict-build-id)
>    strict=true
>    ;;
>  --run-dwz)
>    run_dwz=true
>    ;;
>  --dwz-low-mem-die-limit)
>    dwz_low_mem_die_limit=$2
>    shift
>    ;;
>  --dwz-max-die-limit)
>    dwz_max_die_limit=$2
>    shift
>    ;;
>  --g-libs)
>    strip_glibs=true
>    ;;
>  -g)
>    strip_g=true
>    ;;
>  -m)
>    include_minidebug=true
>    ;;
>  -o)
>    if [ -z "${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
>    ;;
>  -r)
>    strip_r=true
>    ;;
>  *)
>    BUILDDIR=$1
>    shift
>    break
>    ;;
>  esac
>  shift
>done
>
>if [ "$strip_g" = "true" ] && [ "$strip_glibs" = "true" ]; then
>  echo >&2 "*** ERROR: -g  and --g-libs cannot be used together"
>  exit 2
>fi
>
>i=0
>while ((i < nout)); do
>  outs[$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"
>ELFBINSFILE="$BUILDDIR/elfbins.list"
>
>> "$SOURCEFILE"
>> "$LISTFILE"
>> "$LINKSFILE"
>> "$ELFBINSFILE"
>
>debugdir="${RPM_BUILD_ROOT}/usr/lib/debug"
>
>strip_to_debug()
>{
>  local g=
>  local r=
>  $strip_r && r=--reloc-debug-sections
>  $strip_g && case "$(file -bi "$2")" in
>  application/x-sharedlib*) g=-g ;;
>  application/x-executable*) g=-g ;;
>  esac
>  $strip_glibs && case "$(file -bi "$2")" in
>    application/x-sharedlib*) g=-g ;;
>  esac
>  eu-strip --remove-comment $r $g -f "$1" "$2" || exit
>  chmod 444 "$1" || exit
>}
>
>add_minidebug()
>{
>  local debuginfo="$1"
>  local binary="$2"
>
>  local dynsyms=`mktemp`
>  local funcsyms=`mktemp`
>  local keep_symbols=`mktemp`
>  local mini_debuginfo=`mktemp`
>
>  # Extract the dynamic symbols from the main binary, there is no need to also have these
>  # in the normal symbol table
>  nm -D "$binary" --format=posix --defined-only | awk '{ print $1 }' | sort > "$dynsyms"
>  # Extract all the text (i.e. function) symbols from the debuginfo 
>  # Use format sysv to make sure we can match against the actual ELF FUNC
>  # symbol type. The binutils nm posix format symbol type chars are
>  # ambigous for architectures that might use function descriptors.
>  nm "$debuginfo" --format=sysv --defined-only | awk -F \| '{ if ($4 ~ "FUNC") print $1 }' | sort > "$funcsyms"
>  # Keep all the function symbols not already in the dynamic symbol table
>  comm -13 "$dynsyms" "$funcsyms" > "$keep_symbols"
>  # Copy the full debuginfo, keeping only a minumal set of symbols and removing some unnecessary sections
>  objcopy -S --remove-section .gdb_index --remove-section .comment --keep-symbols="$keep_symbols" "$debuginfo" "$mini_debuginfo" &> /dev/null
>  #Inject the compressed data into the .gnu_debugdata section of the original binary
>  xz "$mini_debuginfo"
>  mini_debuginfo="${mini_debuginfo}.xz"
>  objcopy --add-section .gnu_debugdata="$mini_debuginfo" "$binary"
>  rm -f "$dynsyms" "$funcsyms" "$keep_symbols" "$mini_debuginfo"
>}
>
># 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"
>}
>
># Provide .2, .3, ... symlinks to all filename instances of this build-id.
>make_id_dup_link()
>{
>  local id="$1" file="$2" idfile
>
>  local n=1
>  while true; do
>    idfile=".build-id/${id:0:2}/${id:2}.$n"
>    [ $# -eq 3 ] && idfile="${idfile}$3"
>    if [ ! -L "$RPM_BUILD_ROOT/usr/lib/debug/$idfile" ]; then
>      break
>    fi
>    n=$[$n+1]
>  done
>  debug_link "$file" "/$idfile"
>}
>
># 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
>
>  make_id_dup_link "$@"
>
>  [ $# -eq 3 ] && return 0
>
>  local other=$(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
>
># 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
>  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 "$linked" ]; then
>      eval id=\$linkedid_$inum
>      make_id_dup_link "$id" "$dn/$(basename $f)"
>      make_id_dup_link "$id" "/usr/lib/debug$dn/$bn" .debug
>      link=$debugfn
>      get_debugfn "$linked"
>      echo "hard linked $link to $debugfn"
>      mkdir -p "$(dirname "$link")" && ln -nf "$debugfn" "$link"
>      continue
>    else
>      eval linked_$inum=\$f
>      echo "file $f has $[$nlinks - 1] other hard links"
>    fi
>  fi
>
>  echo "extracting debug info from $f"
>  id=$(/usr/lib/rpm/debugedit -b "$RPM_BUILD_DIR" -d /usr/src/debug \
>			      -i -l "$SOURCEFILE" "$f") || exit
>  if [ $nlinks -gt 1 ]; then
>    eval linkedid_$inum=\$id
>  fi
>  if [ -z "$id" ]; then
>    echo >&2 "*** ${strict_error}: No build ID note found in $f"
>    $strict && exit 2
>  fi
>
>  [ -x /usr/bin/gdb-add-index ] && /usr/bin/gdb-add-index "$f" > /dev/null 2>&1
>
>  # 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 "$f"
>  fi
>
>  # strip -g implies we have full symtab, don't add mini symtab in that case.
>  # It only makes sense to add a minisymtab for executables and shared
>  # libraries. Other executable ELF files (like kernel modules) don't need it.
>  if [ "$include_minidebug" = "true" -a "$strip_g" = "false" ]; then
>    skip_mini=true
>    if [ "$strip_glibs" = "false" ]; then
>      case "$(file -bi "$f")" in
>        application/x-sharedlib*) skip_mini=false ;;
>      esac
>    fi
>    case "$(file -bi "$f")" in
>      application/x-sharedlib*) skip_mini=false ;;
>      application/x-executable*) skip_mini=false ;;
>      application/x-pie-executable*) skip_mini=false ;;
>    esac
>    $skip_mini || add_minidebug "${debugfn}" "$f"
>  fi
>
>  echo "./${f#$RPM_BUILD_ROOT}" >> "$ELFBINSFILE"
>  
>  if [ -n "$id" ]; then
>    make_id_link "$id" "$dn/$(basename $f)"
>    make_id_link "$id" "/usr/lib/debug$dn/$bn" .debug
>  fi
>done || exit
>
># Invoke the DWARF Compressor utility.
>if $run_dwz && type dwz >/dev/null 2>&1 \
>   && [ -d "${RPM_BUILD_ROOT}/usr/lib/debug" ]; then
>  dwz_files="`cd "${RPM_BUILD_ROOT}/usr/lib/debug"; find -type f -name \*.debug`"
>  if [ -n "${dwz_files}" ]; then
>    dwz_multifile_name="${RPM_PACKAGE_NAME}-${RPM_PACKAGE_VERSION}-${RPM_PACKAGE_RELEASE}.${RPM_ARCH}"
>    dwz_multifile_suffix=
>    dwz_multifile_idx=0
>    while [ -f "${RPM_BUILD_ROOT}/usr/lib/debug/.dwz/${dwz_multifile_name}${dwz_multifile_suffix}" ]; do
>      let ++dwz_multifile_idx
>      dwz_multifile_suffix=".${dwz_multifile_idx}"
>    done
>    dwz_multfile_name="${dwz_multifile_name}${dwz_multifile_suffix}"
>    dwz_opts="-h -q -r -m .dwz/${dwz_multifile_name}"
>    mkdir -p "${RPM_BUILD_ROOT}/usr/lib/debug/.dwz"
>    [ -n "${dwz_low_mem_die_limit}" ] \
>      && dwz_opts="${dwz_opts} -l ${dwz_low_mem_die_limit}"
>    [ -n "${dwz_max_die_limit}" ] \
>      && dwz_opts="${dwz_opts} -L ${dwz_max_die_limit}"
>    ( cd "${RPM_BUILD_ROOT}/usr/lib/debug" && dwz $dwz_opts $dwz_files )
>    # Remove .dwz directory if empty
>    rmdir "${RPM_BUILD_ROOT}/usr/lib/debug/.dwz" 2>/dev/null
>    if [ -f "${RPM_BUILD_ROOT}/usr/lib/debug/.dwz/${dwz_multifile_name}" ]; then
>      id="`readelf -Wn "${RPM_BUILD_ROOT}/usr/lib/debug/.dwz/${dwz_multifile_name}" \
>	     2>/dev/null | sed -n 's/^    Build ID: $[0-9a-f]\+$/\1/p'`"
>      [ -n "$id" ] \
>	&& make_id_link "$id" "/usr/lib/debug/.dwz/${dwz_multifile_name}" .debug
>    fi
>  fi
>fi
>
># dwz invalidates .gnu_debuglink CRC32 in the main files.
>cat "$ELFBINSFILE" |
>(cd "$RPM_BUILD_ROOT"; xargs -d '\n' /usr/lib/rpm/sepdebugcrcfix usr/lib/debug)
>
># For each symlink whose target has a .debug file,
># make a .debug symlink to that file.
>find "$RPM_BUILD_ROOT" ! -path "${debugdir}/*" -type l -print |
>while read f
>do
>  t=$(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" "${f}.debug"
>  fi
>done
>
>if [ -s "$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 "${RPM_BUILD_ROOT}/usr/src/debug")
>  # stupid cpio creates new directories in mode 0700,
>  # and non-standard modes may be inherented from original directories, fixup
>  find "${RPM_BUILD_ROOT}/usr/src/debug" -type d -print0 |
>  xargs --no-run-if-empty -0 chmod 0755
>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

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Attachments on bug 1552: 316