lgcosta
7b5421ce49
build / build (clang, ) (push) Failing after 7s
build / build (clang, --enable-warnings) (push) Failing after 5s
build / build (gcc, ) (push) Failing after 5s
build / build (gcc, --enable-io-failure-emulation) (push) Failing after 5s
build / build (gcc, --enable-warnings) (push) Failing after 6s
build / out-of-tree (push) Failing after 6s
build / sanitizers (push) Failing after 5s
Clang (22.1.8 on the host, 14.0.6 in the Debian VM) now builds the tree
warning-free with --enable-warnings, in-tree and out-of-tree, with -j, and
the full VM battery passes with CC=clang: 12/12. ASan/UBSan builds run the
real tool paths (mkfs, check, tune, resize, rollback save/restore/reject)
with halt_on_error and report zero errors. Documented in tests/vm/RESULTS.md;
the CI gained clang+warnings, out-of-tree and sanitizer jobs.
Fixes found by this work:
- reiserfscore/Makefile.am: reiserfs_err.c and reiserfs_err.h shared one
recipe. With -j, make runs the recipe once per stale target, so two
compile_et invocations race: one deletes reiserfs_err.c ("no input
files") while another job compiles it. Attached the recipe to
reiserfs_err.c only; reiserfs_err.h merely depends on it. Reproduced
with clang+ASan, stable across 5 clang / 3 asan / 3 gcc parallel builds.
- reiserfscore/Makefile.am: the rule read the source-local
reiserfs_err.et, so VPATH builds could not find it. Use $(srcdir)/.
make distcheck now passes.
- reiserfscore/reiserfslib.c: reiserfs_close() did fsync(fs->fs_dev) after
reiserfs_free() released fs -- a 4-byte heap-use-after-free, flagged
exactly at reiserfslib.c:406/407 by ASan (found by clang+ASan; gcc never
caught it because the freed heap usually still holds the old value).
Moved fsync before the free; reiserfs_flush() has already written
journal and dirty buffers at that point and free_buffers() never
writes, so the ordering preserves durability semantics.
- fsck/semantic_check.c, fsck/semantic_rebuild.c: three %K arguments passed
&tmp_deh->deh2_dir_id where a struct reiserfs_key * is expected. It
printed the right values only because deh2_dir_id sits at offset 4 and
the key is read from the pointer as if dir_id sat at offset 0. Build a
proper local key with set_key_dirid()/set_key_objectid() (the same
idiom debugreiserfs/scan.c already uses). Verified -Waddress-of-packed-
member (clang-only) is gone and output is unchanged.
- reiserfscore/hashes.c: four unreachable *(int *)0 = 0 stores (guarded by
len >= 16/12/8/4 tests that cannot hold after the while (len >= 16)
loop, len <= 15). Removed; clang's -Wnull-dereference goes quiet.
Behavior verified: keyed_hash/yura_hash/r5_hash outputs for 16 inputs
from 0 to 17 bytes are byte-identical before and after.
run_in_vm.sh: propagate CC into the guest, force a remount of /mnt/data
(the host rewrites the backing file under the guest), exclude generated
reiserfs_err.[ch] from the source tar. run_tests.sh: report which compiler
the battery actually used.