146 lines
4.1 KiB
Bash
Executable File
146 lines
4.1 KiB
Bash
Executable File
#!/bin/bash
|
|
# Wrapper script for find-debuginfo.sh
|
|
#
|
|
# Usage:
|
|
# wrap-find-debuginfo.sh SYSROOT-PATH SCRIPT-PATH SCRIPT-ARGS...
|
|
#
|
|
# The wrapper saves the original version of ld.so found in SYSROOT-PATH,
|
|
# invokes SCRIPT-PATH with SCRIPT-ARGS, and then restores the
|
|
# LDSO-PATH file, followed by note merging and DWZ compression.
|
|
# As a result, ld.so has (mostly) unchanged debuginfo even
|
|
# after debuginfo extraction.
|
|
#
|
|
# For libc.so.6 and other shared objects, a set of strategic symbols
|
|
# is preserved in .symtab that are frequently used in valgrind
|
|
# suppressions and elsewhere.
|
|
|
|
set -evx
|
|
|
|
tar_tmp="$(mktemp)"
|
|
declare -A libc_dlink_tmp_list
|
|
ldso_annobin_sym_tmp_list=""
|
|
|
|
# Prefer a separately installed debugedit over the RPM-integrated one.
|
|
if command -v debugedit >/dev/null ; then
|
|
debugedit=debugedit
|
|
else
|
|
debugedit=/usr/lib/rpm/debugedit
|
|
fi
|
|
|
|
cleanup () {
|
|
rm -f "$tar_tmp" ${libc_dlink_tmp_list[@]} $ldso_annobin_sym_tmp_list
|
|
}
|
|
trap cleanup 0
|
|
|
|
sysroot_path="$1"
|
|
shift
|
|
script_path="$1"
|
|
shift
|
|
|
|
# See run_ldso setting in glibc.spec.
|
|
ldso_list=`cd "$sysroot_path"; find . -name 'ld-*.so' -type f`
|
|
libc_list=`cd "$sysroot_path"; find . -name 'libc-*.so' -type f`
|
|
libdl_list=`cd "$sysroot_path"; find . -name 'libdl-*.so' -type f`
|
|
libpthread_list=`cd "$sysroot_path"; find . -name 'libpthread-*.so' -type f`
|
|
librt_list=`cd "$sysroot_path"; find . -name 'librt-*.so' -type f`
|
|
|
|
full_list="$ldso_list $libc_list $libdl_list $libpthread_list $librt_list"
|
|
|
|
# Preserve the original files.
|
|
(cd "$sysroot_path"; ls -l $full_list)
|
|
(cd "$sysroot_path"; tar cvf "$tar_tmp" $full_list)
|
|
|
|
# Run the debuginfo extraction.
|
|
"$script_path" "$@"
|
|
|
|
# libc.so.6: Extract the .gnu_debuglink section
|
|
for f in $libc_list
|
|
do
|
|
dlink_tmp="$(mktemp)"
|
|
libc_dlink_tmp_list["$f"]="$dlink_tmp"
|
|
objcopy -j.gnu_debuglink --set-section-flags .gnu_debuglink=alloc \
|
|
-O binary "$sysroot_path/$f" "$dlink_tmp"
|
|
done
|
|
|
|
# Restore the original files.
|
|
(cd "$sysroot_path"; tar xf "$tar_tmp")
|
|
(cd "$sysroot_path"; ls -l $full_list)
|
|
|
|
# Reduce the size of notes. Primarily for annobin.
|
|
for p in $full_list
|
|
do
|
|
objcopy --merge-notes "$sysroot_path/$p"
|
|
done
|
|
|
|
# libc.so.6: Restore the .gnu_debuglink section
|
|
for f in ${!libc_dlink_tmp_list[@]}
|
|
do
|
|
dlink_tmp="${libc_dlink_tmp_list[$f]}"
|
|
objcopy --add-section .gnu_debuglink="$dlink_tmp" "$sysroot_path/$f"
|
|
done
|
|
|
|
# ld.so does not have separated debuginfo and so the debuginfo file
|
|
# generated by find-debuginfo is redundant. Therefore, remove it.
|
|
for ldso_debug in `find "$sysroot_path" -name 'ld-*.so*.debug' -type f`
|
|
do
|
|
rm -f "$ldso_debug"
|
|
done
|
|
|
|
# libc.so.6 and other shared objects: Reduce to valuable symbols.
|
|
# Eliminate file symbols, annobin symbols, and symbols used by the
|
|
# glibc build to implement hidden aliases (__EI_*). We would also
|
|
# like to remove __GI_* symbols, but even listing them explicitly (as
|
|
# in -K __GI_strlen) still causes strip to remove them, so there is no
|
|
# filtering of __GI_* here. (Debuginfo is gone after this, so no need
|
|
# to optimize it.)
|
|
for p in $libc_list $libdl_list $libpthread_list $librt_list ; do
|
|
strip -w \
|
|
-K '*' \
|
|
-K '!*.c' \
|
|
-K '!*.os' \
|
|
-K '!.annobin_*' \
|
|
-K '!__EI_*' \
|
|
-K '!__PRETTY_FUNCTION__*' \
|
|
"$sysroot_path/$p"
|
|
done
|
|
|
|
# ld.so: Rewrite the source file paths to match the extracted
|
|
# locations. First compute the arguments for invoking debugedit.
|
|
# See find-debuginfo.sh.
|
|
debug_dest_name="/usr/src/debug"
|
|
last_arg=
|
|
while true ; do
|
|
arg="$1"
|
|
shift || break
|
|
case "$arg" in
|
|
(--unique-debug-src-base)
|
|
debug_dest_name="/usr/src/debug/$1"
|
|
shift
|
|
;;
|
|
(-*)
|
|
;;
|
|
(*)
|
|
last_arg="$arg"
|
|
;;
|
|
esac
|
|
done
|
|
debug_base_name=${last_arg:-$RPM_BUILD_ROOT}
|
|
for p in $ldso_list
|
|
do
|
|
$debugedit -b "$debug_base_name" -d "$debug_dest_name" -n "$sysroot_path/$p"
|
|
|
|
# Remove the .annobin* symbols (and only them).
|
|
ldso_annobin_sym_tmp="$(mktemp)"
|
|
ldso_annobin_sym_tmp_list+=" $ldso_annobin_sym_tmp"
|
|
if nm --format=posix "$sysroot_path/$p" | cut -d' ' -f1 \
|
|
| grep '^\.annobin' > "$ldso_annobin_sym_tmp"; then
|
|
objcopy --strip-symbols="$ldso_annobin_sym_tmp" "$sysroot_path/$p"
|
|
fi
|
|
done
|
|
|
|
# Apply single-file DWARF optimization.
|
|
for ldso in $ldso_list
|
|
do
|
|
dwz "$sysroot_path/$p"
|
|
done
|