Early in the function we set "namelen = strlen(name)" if "name" is
non-NULL. Later, we use "namelen" only if "name" is non-NULL. However,
it's hard to immediately see this, and it seems to confuse gcc 9.2.1
(with "-flto" interestingly, though all of the involved logic is in
inline functions; it also triggers when building with ASan).
Let's simplify the code and remove the variable entirely. There's only
one use of namelen anyway, so we can just call strlen() then. It's true
this is in a loop, so we might execute strlen() more often. But:
- this is test code that only ever loops twice in our test suite (we
do loop 1000 times in a t/perf test, but without using this option).
- a decent compiler ought to be able to hoist that out of the loop
anyway (though I wouldn't count on gcc 9.2.1 doing so!)
Reported-by: Stephan Beyer <s-beyer@gmx.net>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This one is tricky.
When `core.fsmonitor` is set, a `refresh_index()` will not perform a
full scan of files that might be modified, but will query the fsmonitor
and refresh only the ones that have been actually touched.
Due to implementation details, the fsmonitor is queried in
`refresh_cache_ent()`, but of course it only has to be queried once, so
we set a flag when we did that. But when the index was discarded, we did
not re-set that flag.
So far, this is only covered by our test suite when running with
GIT_TEST_FSMONITOR=$PWD/t7519/fsmonitor-all, and only due to the way the
built-in stash interacts with the recursive merge machinery.
Let's introduce a straight-forward regression test for this.
We simply extend the "read & discard index" loop in `test-tool
read-cache` to optionally refresh the index, report on a given file's
status, and then modify that file. Due to the bug described above, only
the first refresh will actually query the fsmonitor; subsequent loop
iterations will not.
This problem was reported by Ævar Arnfjörð Bjarmason.
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
b1ef400e (setup_git_env: avoid blind fall-back to ".git") made programs
that tried to access a repository without initializing properly die with
a diagnostic message. One offender is test-read-cache, which is used in
p0002. Fix it by calling setup_git_directory() before accessing the
index.
Signed-off-by: Rene Scharfe <l.s.r@web.de>
Reviewed-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This keeps top dir a bit less crowded. And because these programs are
for testing purposes, it makes sense that they stay somewhere in t/
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
