Redo the crafted libc.so.6 symbol table for valgrind (#1965374)
This commit is contained in:
Florian Weimer
parent
654f636b32
commit
14d5c92a57
10
glibc.spec
10
glibc.spec
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@ -97,7 +97,7 @@
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Summary: The GNU libc libraries
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Name: glibc
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Version: %{glibcversion}
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Release: 20%{?dist}
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Release: 21%{?dist}
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# In general, GPLv2+ is used by programs, LGPLv2+ is used for
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# libraries.
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@ -150,6 +150,11 @@ rpm.define("__debug_install_post bash " .. wrapper
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.. " " .. sysroot .. " " .. original)
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}
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# The wrapper script relies on the fact that debugedit does not change
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# build IDs.
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%define _no_recompute_build_ids 1
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%undefine _unique_build_ids
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##############################################################################
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# Patches:
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# - See each individual patch file for origin and upstream status.
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@ -2184,6 +2189,9 @@ fi
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%files -f compat-libpthread-nonshared.filelist -n compat-libpthread-nonshared
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%changelog
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* Thu Jun 17 2021 Florian Weimer <fweimer@redhat.com> - 2.33.9000-21
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- Redo the crafted libc.so.6 symbol table for valgrind (#1965374)
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* Thu Jun 17 2021 Florian Weimer <fweimer@redhat.com> - 2.33.9000-20
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- Remove .symtab from libc.so.6 again (#1965374)
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@ -9,10 +9,14 @@
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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, a set of strategic symbols is preserved in .symtab
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# that are frequently used in valgrind suppressions.
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set -ex
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ldso_tmp="$(mktemp)"
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libc_tmp="$(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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@ -22,7 +26,7 @@ else
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fi
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cleanup () {
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rm -f "$ldso_tmp"
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rm -f "$ldso_tmp" "$libc_tmp"
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}
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trap cleanup 0
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@ -43,21 +47,94 @@ for ldso_candidate in `find "$sysroot_path" -regextype posix-extended \
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fi
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done
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# Preserve the original file.
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# libc.so.6 always uses this name, so it is simpler to locate.
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libc_path=
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for libc_candidate in `find "$sysroot_path" -name libc.so.6`; do
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if test -z "$libc_path" ; then
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libc_path="$libc_candidate"
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else
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echo "error: multiple libc.so.6 candidates: $libc_path, $libc_candidate"
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exit 1
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fi
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done
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# Preserve the original files.
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cp "$ldso_path" "$ldso_tmp"
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cp "$libc_path" "$libc_tmp"
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# Run the debuginfo extraction.
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"$script_path" "$@"
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# Restore the original file.
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# Restore the original files.
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cp "$ldso_tmp" "$ldso_path"
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cp "$libc_tmp" "$libc_path"
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# Reduce the size of notes. Primarily for annobin.
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objcopy --merge-notes "$ldso_path"
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objcopy --merge-notes "$libc_path"
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# Rewrite the source file paths to match the extracted locations.
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# First compute the arguments for invoking debugedit. See
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# find-debuginfo.sh.
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# libc.so.6: Reduce to strategic symbols needed by valgrind.
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# pthread_create is needed to trigger loading of libthread_db in GDB.
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# (Debuginfo is gone after this, so no need to optimize it.)
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strip \
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-K __GI___rawmemchr \
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-K __GI___strcasecmp_l \
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-K __GI___strncasecmp_l \
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-K __GI_memchr \
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-K __GI_memcmp \
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-K __GI_memcpy \
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-K __GI_memmove \
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-K __GI_mempcpy \
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-K __GI_stpcpy \
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-K __GI_strcasecmp \
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-K __GI_strcasecmp_l \
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-K __GI_strcat \
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-K __GI_strchr \
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-K __GI_strcmp \
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-K __GI_strcpy \
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-K __GI_strcspn \
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-K __GI_strlen \
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-K __GI_strncasecmp \
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-K __GI_strncasecmp_l \
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-K __GI_strncmp \
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-K __GI_strncpy \
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-K __GI_strnlen \
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-K __GI_strrchr \
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-K __GI_wcsnlen \
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-K __GI_wmemchr \
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-K __memcmp_sse2 \
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-K __memcmp_sse4_1 \
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-K __memcpy_avx_unaligned_erms \
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-K __memcpy_chk \
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-K __memcpy_sse2 \
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-K __memmove_chk \
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-K __stpcpy_chk \
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-K __stpcpy_sse2 \
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-K __stpcpy_sse2_unaligned \
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-K __strchr_sse2 \
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-K __strchr_sse2_no_bsf \
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-K __strcmp_sse2 \
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-K __strcmp_sse42 \
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-K __strcpy_chk \
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-K __strlen_sse2 \
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-K __strlen_sse2_no_bsf \
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-K __strlen_sse42 \
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-K __strncmp_sse2 \
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-K __strncmp_sse42 \
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-K __strncpy_sse2 \
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-K __strncpy_sse2_unaligned \
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-K __strrchr_sse2 \
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-K __strrchr_sse2_no_bsf \
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-K __strrchr_sse42 \
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-K __strstr_sse2 \
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-K __strstr_sse42 \
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-K pthread_create \
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"$libc_path"
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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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