113 lines
3.0 KiB
Bash
113 lines
3.0 KiB
Bash
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#!/bin/bash
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# Wrapper script for find-debuginfo.sh
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#
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# Usage:
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# wrap-find-debuginfo.sh SYSROOT-PATH SCRIPT-PATH SCRIPT-ARGS...
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#
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# The wrapper saves the original version of ld.so found in SYSROOT-PATH,
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# invokes SCRIPT-PATH with SCRIPT-ARGS, and then restores the
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# LDSO-PATH file, followed by note merging and DWZ compression.
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# As a result, ld.so has (mostly) unchanged debuginfo even
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# after debuginfo extraction.
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#
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# For libc.so.6 and other shared objects, a set of strategic symbols
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# is preserved in .symtab that are frequently used in valgrind
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# suppressions and elsewhere.
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set -evx
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tar_tmp="$(mktemp)"
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# Prefer a separately installed debugedit over the RPM-integrated one.
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if command -v debugedit >/dev/null ; then
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debugedit=debugedit
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else
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debugedit=/usr/lib/rpm/debugedit
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fi
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cleanup () {
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rm -f "$tar_tmp"
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}
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trap cleanup 0
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sysroot_path="$1"
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shift
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script_path="$1"
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shift
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# See run_ldso setting in glibc.spec.
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ldso_list=`cd "$sysroot_path"; find . -name 'ld-*.so' -type f`
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libc_list=`cd "$sysroot_path"; find . -name 'libc-*.so' -type f`
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libdl_list=`cd "$sysroot_path"; find . -name 'libdl-*.so' -type f`
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libpthread_list=`cd "$sysroot_path"; find . -name 'libpthread-*.so' -type f`
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librt_list=`cd "$sysroot_path"; find . -name 'librt-*.so' -type f`
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full_list="$ldso_list $libc_list $libdl_list $libpthread_list $librt_list"
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# Preserve the original files.
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(cd "$sysroot_path"; ls -l $full_list)
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(cd "$sysroot_path"; tar cvf "$tar_tmp" $full_list)
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# Run the debuginfo extraction.
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"$script_path" "$@"
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# Restore the original files.
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(cd "$sysroot_path"; tar xf "$tar_tmp")
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(cd "$sysroot_path"; ls -l $full_list)
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# Reduce the size of notes. Primarily for annobin.
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for p in $full_list
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do
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objcopy --merge-notes "$sysroot_path/$p"
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done
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# libc.so.6 and other shared objects: Reduce to valuable symbols.
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# Eliminate file symbols, annobin symbols, and symbols used by the
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# glibc build to implement hidden aliases (__EI_*). We would also
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# like to remove __GI_* symbols, but even listing them explicitly (as
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# in -K __GI_strlen) still causes strip to remove them, so there is no
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# filtering of __GI_* here. (Debuginfo is gone after this, so no need
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# to optimize it.)
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for p in $libc_list $libdl_list $libpthread_list $librt_list ; do
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strip -w \
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-K '*' \
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-K '!*.c' \
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-K '!*.os' \
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-K '!.annobin_*' \
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-K '!__EI_*' \
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-K '!__PRETTY_FUNCTION__*' \
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"$sysroot_path/$p"
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done
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# ld.so: Rewrite the source file paths to match the extracted
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# locations. First compute the arguments for invoking debugedit.
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# See find-debuginfo.sh.
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debug_dest_name="/usr/src/debug"
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last_arg=
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while true ; do
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arg="$1"
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shift || break
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case "$arg" in
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(--unique-debug-src-base)
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debug_dest_name="/usr/src/debug/$1"
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shift
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;;
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(-*)
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;;
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(*)
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last_arg="$arg"
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;;
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esac
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done
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debug_base_name=${last_arg:-$RPM_BUILD_ROOT}
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for p in $ldso_list
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do
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$debugedit -b "$debug_base_name" -d "$debug_dest_name" -n "$sysroot_path/$p"
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done
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# Apply single-file DWARF optimization.
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for ldso in $ldso_list
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do
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dwz "$sysroot_path/$p"
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done
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