Created attachment 876503 [details] build.log 25/46 dbus-broker / Name Registry OK 0.04s 26/46 libcdvar-1 / Basic API Behavior FAIL 0.25s killed by signal 6 SIGABRT >>> ASAN_OPTIONS=halt_on_error=1:abort_on_error=1:print_summary=1 MALLOC_PERTURB_=216 /var/tmp/portage/sys-apps/dbus-broker-33/work/dbus-broker-33-build/subprojects/libcdvar-1/src/test-basic ✀ stderr: test-basic: ../dbus-broker-33/subprojects/libcdvar-1/src/test-basic.c:81: test_basic_serialization: Assertion `false && "!strcmp(str1, \"foo\")"' failed. [...] ---- $ emerge --info Portage 3.0.56 (python 3.12.0-final-0, default/linux/amd64/17.1/hardened, gcc-14, glibc-2.38-r7, 6.6.3 x86_64) ================================================================= System uname: Linux-6.6.3-x86_64-AMD_Ryzen_9_3950X_16-Core_Processor-with-glibc2.38 KiB Mem: 65758032 total, 11552224 free KiB Swap: 16662520 total, 16662520 free Timestamp of repository gentoo: Sun, 03 Dec 2023 02:32:01 +0000 Head commit of repository gentoo: fdfd3a14f32bf12623212bfb5fd848c6c5cd71d6 Timestamp of repository kde: Sat, 02 Dec 2023 21:46:53 +0000 Head commit of repository kde: d34eb57b73244ce1070405a3f28deede7a16539c Timestamp of repository qt: Mon, 27 Nov 2023 11:01:53 +0000 Head commit of repository qt: 7071b523f771b82452e8aa7a5cf4603f2a47ef77 Timestamp of repository sam_c: Tue, 21 Nov 2023 21:03:38 +0000 Head commit of repository sam_c: 825751d17304603dd900cc0dfe2c9e405b562c31 Timestamp of repository steam-overlay: Mon, 27 Nov 2023 11:16:58 +0000 Head commit of repository steam-overlay: f0f7b42613f9bf45b2772ae50d0c0faeeb7a6ccb sh dash 0.5.12 ld GNU ld (Gentoo 2.41 p2) 2.41.0 ccache version 4.8.3 [disabled] app-misc/pax-utils: 1.3.7::gentoo app-shells/bash: 5.2_p21-r1::gentoo dev-java/java-config: 2.3.3-r1::gentoo dev-lang/perl: 5.38.2::gentoo dev-lang/python: 3.10.13::gentoo, 3.11.6::gentoo, 3.12.0_p1::gentoo dev-lang/rust: 1.73.0::gentoo dev-util/ccache: 4.8.3::gentoo dev-util/cmake: 3.27.9::gentoo dev-util/meson: 1.3.0-r1::gentoo sys-apps/baselayout: 2.14-r1::gentoo sys-apps/sandbox: 2.38::gentoo sys-apps/systemd: 255_rc4::gentoo sys-devel/autoconf: 2.13-r8::gentoo, 2.69-r9::gentoo, 2.71-r7::gentoo, 9999::gentoo sys-devel/automake: 1.16.5-r1::gentoo sys-devel/binutils: 2.38-r2::gentoo, 2.39-r5::gentoo, 2.40-r9::gentoo, 2.41-r2::gentoo sys-devel/binutils-config: 5.5::gentoo sys-devel/clang: 17.0.6::gentoo sys-devel/gcc: 10.5.0::gentoo, 11.4.1_p20231130::gentoo, 12.3.1_p20231201::gentoo, 13.2.1_p20231125::gentoo, 14.0.0.9999::gentoo sys-devel/gcc-config: 2.11::gentoo sys-devel/libtool: 2.4.7-r1::gentoo sys-devel/lld: 17.0.6::gentoo sys-devel/llvm: 17.0.6::gentoo sys-devel/make: 4.4.1-r1::gentoo sys-kernel/linux-headers: 6.6::gentoo (virtual/os-headers) sys-libs/glibc: 2.38-r7::gentoo Repositories: gentoo location: /var/db/repos/gentoo sync-type: git sync-uri: https://github.com/gentoo-mirror/gentoo.git priority: -1000 eclass-overrides: sam_c volatile: False sync-git-clone-extra-opts: -b stable -c gc.reflogExpire=0 -c gc.reflogExpireUnreachable=0 -c gc.rerereresolved=0 -c gc.rerereunresolved=0 -c gc.pruneExpire=now sync-git-verify-commit-signature: yes crossdev location: /var/db/repos/crossdev masters: gentoo eclass-overrides: sam_c volatile: True kde location: /var/db/repos/kde sync-type: git sync-uri: https://github.com/gentoo-mirror/kde.git masters: gentoo eclass-overrides: sam_c volatile: False local location: /var/db/repos/local masters: gentoo eclass-overrides: sam_c volatile: False qt location: /var/db/repos/qt sync-type: git sync-uri: https://github.com/gentoo-mirror/qt.git masters: gentoo eclass-overrides: sam_c volatile: False sam_c location: /var/db/repos/sam_c sync-type: git sync-uri: https://github.com/gentoo-mirror/sam_c.git masters: gentoo eclass-overrides: sam_c volatile: False steam-overlay location: /var/db/repos/steam-overlay sync-type: git sync-uri: https://github.com/gentoo-mirror/steam-overlay.git masters: gentoo eclass-overrides: sam_c volatile: False Installed sets: @sam-emacs, @sam-fonts, @sam-fortune ACCEPT_KEYWORDS="amd64 ~amd64" ACCEPT_LICENSE="@FREE" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O3 -march=native -fno-semantic-interposition -pipe -Wa,-O2 -Wa,-mtune=znver2 -fcf-protection=none -fdiagnostics-color=always -fdiagnostics-urls=never -frecord-gcc-switches " CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/config /usr/share/gnupg/qualified.txt" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf 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https://mirror.bytemark.co.uk/gentoo/ https://mirrors.soeasyto.com/distfiles.gentoo.org/" LANG="en_GB.UTF-8" LDFLAGS="-Wl,-O1 -Wl,--as-needed -Wl,--defsym=__gentoo_check_ldflags__=0 -Wl,-z,pack-relative-relocs" LEX="reflex" LINGUAS="en en_GB" MAKEOPTS="-j32 --output-sync=line" PKGDIR="/var/cache/binpkgs" PORTAGE_BUNZIP2_COMMAND="lbunzip2" PORTAGE_COMPRESS="xz" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages --exclude=/.git" PORTAGE_TMPDIR="/var/tmp" RUSTFLAGS="-C target-cpu=native -C link-arg=-Wl,-z,pack-relative-relocs" SHELL="/bin/bash" USE="X a52 aac acl acpi activities aes alsa amd64 avx avx2 bash-completion bluetooth branding bzip2 cairo caps cdda cdr cet clang cli crypt dbus declarative dist-kernel dri dts dvd dvdr editorconfig emacs encode exif f16c filecaps firewalld flac fma3 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Created attachment 876504 [details] testlog.txt
This happens w/ gcc-13 + -O2 as well, it just needs -fno-semantic-interposition. It stops happening with -fno-strict-aliasing. I applied this for now: commit ac0bc46eaa27105ea7ca3d854ecaeaa3b99e9880 Author: Sam James <sam@gentoo.org> Date: Sun Dec 3 00:20:00 2023 +0000 sys-apps/dbus-broker: filter -fno-semantic-interposition Causes test failures. (Not going to revbump as this isn't anything new and anyone who hits it would notice immediately.) Signed-off-by: Sam James <sam@gentoo.org> Just filed the bug here so I remember to come back to it and dig in more.
The issue is in the libcdvar subproject (https://github.com/c-util/c-dvar). I can reproduce it w/ this from a libcdvar clone: CFLAGS="-Og -ggdb3 -fno-semantic-interposition" meson setup build --wipe ; meson test -C build
sorry, you need -O2, not -Og.
test-basic: ../src/test-basic.c:81: test_basic_serialization: Assertion `false && "!strcmp(str1, \"foo\")"' failed. Program received signal SIGABRT, Aborted. 0x00007ffff7e4d21c in ?? () from /usr/lib64/libc.so.6 (gdb) frame 5 #5 0x000055555555621e in test_basic_serialization (big_endian=big_endian@entry=true) at ../src/test-basic.c:81 81 c_assert(!strcmp(str1, "foo")); (gdb) p str1 $1 = 0x55555555a0b9 "" (gdb)
The bug has been referenced in the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=9541f03613b3824f83a26dd1f0654f1e031a6050 commit 9541f03613b3824f83a26dd1f0654f1e031a6050 Author: Sam James <sam@gentoo.org> AuthorDate: 2023-12-03 04:43:58 +0000 Commit: Sam James <sam@gentoo.org> CommitDate: 2023-12-03 04:45:00 +0000 sys-apps/dbus-broker: filter-lto & -fno-strict-aliasing Initially hit a test failure w/ -fno-semantic-interposition and hadn't yet had a chance to dig in more, but it looks like it's really an aliasing issue exposed by it (dbus-broker doesn't rely on LD_PRELOAD at all). So, follow up to ac0bc46eaa27105ea7ca3d854ecaeaa3b99e9880, filter-lto and pass -fno-strict-aliasing with a new revision as this may well break in other cases even w/o -fno-semantic-interposition. Bug: https://bugs.gentoo.org/919100 Signed-off-by: Sam James <sam@gentoo.org> .../dbus-broker/{dbus-broker-33.ebuild => dbus-broker-33-r1.ebuild} | 5 +++-- sys-apps/dbus-broker/dbus-broker-9999.ebuild | 5 +++-- 2 files changed, 6 insertions(+), 4 deletions(-)
I figured I'd try -Werror=strict-aliasing -Wstrict-aliasing=2 on a punt first before spending more time on it. I'm glad I did, because it wasn't in the serialisation code like I expected, but a submodule of it. Long story short: https://github.com/c-util/c-utf8/commit/4b7cb9f940e45d3c68bf427cdeeaf5da47b03b41. I'll pull that in now.
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=345f98126f9d9d6abbd7fa89868f2c4edfed6001 commit 345f98126f9d9d6abbd7fa89868f2c4edfed6001 Author: Sam James <sam@gentoo.org> AuthorDate: 2023-12-03 09:00:42 +0000 Commit: Sam James <sam@gentoo.org> CommitDate: 2023-12-03 09:02:04 +0000 sys-apps/dbus-broker: backport strict aliasing fix Closes: https://bugs.gentoo.org/919100 Signed-off-by: Sam James <sam@gentoo.org> sys-apps/dbus-broker/dbus-broker-33-r2.ebuild | 65 +++++++ sys-apps/dbus-broker/dbus-broker-9999.ebuild | 10 +- .../files/dbus-broker-33-strict-aliasing.patch | 207 +++++++++++++++++++++ 3 files changed, 277 insertions(+), 5 deletions(-)
