Dev support update.
* sg/ci-brew-gcc-workaround:
ci/lib.sh: update a comment about installed P4 and Git-LFS versions
ci: disable Homebrew's auto cleanup
ci: don't update Homebrew
Code clean-up for new compilers.
The 'kwset' one may get a wholesale replacement, either with new
version of kwset from upstream or removal of its users, but in the
meantime, it is probably OK to merge it down.
* js/gcc-8-and-9:
config: avoid calling `labs()` on too-large data type
winansi: simplify loading the GetCurrentConsoleFontEx() function
kwset: allow building with GCC 8
poll (mingw): allow compiling with GCC 8 and DEVELOPER=1
The 'fsck.skipList' and 'fsck.<msg-id>' config variables might be
easier to discover when they are documented in 'git fsck's man page.
Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
92b7de93fb (Implement the patience diff algorithm, 2009-01-07) added them
but were already part of xinclude.h
Signed-off-by: Carlo Marcelo Arenas Belón <carenas@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
8c912eea94 ("teach --histogram to diff", 2011-07-12) included them, but
were already part of xinclude.h
Signed-off-by: Carlo Marcelo Arenas Belón <carenas@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
After b46054b374 ("xdiff: use git-compat-util", 2019-04-11), two system
headers added with 6942efcfa9 ("xdiff: load full words in the inner loop
of xdl_hash_record", 2012-04-06) to xutils.c are no longer needed and
could conflict as shown below from an OpenIndiana build:
In file included from xdiff/xinclude.h:26:0,
from xdiff/xutils.c:25:
./git-compat-util.h:4:0: warning: "_FILE_OFFSET_BITS" redefined
#define _FILE_OFFSET_BITS 64
In file included from /usr/include/limits.h:37:0,
from xdiff/xutils.c:23:
/usr/include/sys/feature_tests.h:231:0: note: this is the location of the previous definition
#define _FILE_OFFSET_BITS 32
Make sure git-compat-util.h is the first header (through xinclude.h)
Signed-off-by: Carlo Marcelo Arenas Belón <carenas@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
As discussed in the last commit partially fix a bug introduced in
b65abcafc7 ("grep: use PCRE v2 for optimized fixed-string search",
2019-07-01). Because PCRE v2, unlike kwset, validates its UTF-8 input
we'd die on e.g.:
fatal: pcre2_match failed with error code -22: UTF-8 error:
isolated byte with 0x80 bit set
When grepping a non-ASCII fixed string. This is a more general problem
that's hard to fix, but we can at least fix the most common case of
grepping for a fixed string without "-i". I can't think of a reason
for why we'd turn on PCRE2_UTF when matching byte-for-byte like that.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Since my b65abcafc7 ("grep: use PCRE v2 for optimized fixed-string
search", 2019-07-01) we've been dying on invalid UTF-8 data when
grepping for fixed strings if the following are all true:
* The subject string is non-ASCII (e.g. "ævar")
* We're under a is_utf8_locale(), e.g. "en_US.UTF-8", not "C"
* We compiled with PCRE v2
* That PCRE v2 did not have JIT support
The last of those is why this wasn't caught earlier, per pcre2jit(3):
"unless PCRE2_NO_UTF_CHECK is set, a UTF subject string is tested
for validity. In the interests of speed, these checks do not
happen on the JIT fast path, and if invalid data is passed, the
result is undefined."
I.e. the subject being matched against our pattern was invalid, but we
were lucky and getting away with it on the JIT path, but the non-JIT
one is stricter.
This patch does nothing to fix that, instead we sneak in support for
fixed patterns starting with "(*NO_JIT)", this disables the PCRE v2
jit with implicit fixed-string matching for testing, see
pcre2syntax(3) the syntax.
This is technically a change in behavior, but it's so obscure that I
figured it was OK. We'd previously consider this an invalid regular
expression as regcomp() would die on it, now we feed it to the PCRE v2
fixed-string path. I thought this was better than introducing yet
another GIT_TEST_* environment variable.
We're also relying on a behavior of PCRE v2 that technically could
change, but I think the test coverage is worth dipping our toe into
some somewhat undefined behavior.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This change paves the way for later using this value the regex compile
functions themselves.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
At the start of this function we do:
p->fixed = opt->fixed;
It's less confusing to use that variable consistently that switch back
& forth between the two.
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Simplify the PCRE v1 code for the same reasons as for the PCRE v2 code
in the last commit. Unlike with v2 we actually used the custom stack
in v1, but let's use PCRE's built-in 32 KB one instead, since
experience with v2 shows that's enough. Most distros are already using
v2 as a default, and the underlying sljit code is the same.
Unfortunately we can't just pass a NULL to pcre_jit_exec() as with
pcre2_jit_match(). Unlike the v2 function it doesn't support
that. Instead we need to use the fatter pcre_exec() if we'd like the
same behavior.
This will make things slightly slower than on the fast-path function,
but it's OK since we care less about v1 performance these days since
we have and recommend v2. Running a similar performance test as what I
ran in fbaceaac47 ("grep: add support for the PCRE v1 JIT API",
2017-05-25) via:
GIT_PERF_REPEAT_COUNT=30 GIT_PERF_LARGE_REPO=~/g/linux GIT_PERF_MAKE_OPTS='-j8 USE_LIBPCRE1=Y CFLAGS=-O3 LIBPCREDIR=/home/avar/g/pcre/inst' ./run HEAD~ HEAD p7820-grep-engines.sh
Gives us this, just the /perl/ results:
Test HEAD~ HEAD
---------------------------------------------------------------------------------------
7820.3: perl grep 'how.to' 0.19(0.67+0.52) 0.19(0.65+0.52) +0.0%
7820.7: perl grep '^how to' 0.19(0.78+0.44) 0.19(0.72+0.49) +0.0%
7820.11: perl grep '[how] to' 0.39(2.13+0.43) 0.40(2.10+0.46) +2.6%
7820.15: perl grep '(e.t[^ ]*|v.ry) rare' 0.44(2.55+0.37) 0.45(2.47+0.41) +2.3%
7820.19: perl grep 'm(ú|u)lt.b(æ|y)te' 0.23(1.06+0.42) 0.22(1.03+0.43) -4.3%
It will also implicitly re-enable UTF-8 validation for PCRE v1. As
noted in [1] we now have cases as a result where PCRE v1 is more eager
to error out. Subsequent patches will fix that for v2, and I think
it's fair to tell v1 users "just upgrade" and not worry about that
edge case for v1.
1. https://public-inbox.org/git/CAPUEsphZJ_Uv9o1-yDpjNLA_q-f7gWXz9g1gCY2pYAYN8ri40g@mail.gmail.com/
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
As reported in [1] the code I added in 94da9193a6 ("grep: add support
for PCRE v2", 2017-06-01) to use a custom JIT stack has never
worked. It was incorrectly copy/pasted from code I added in
fbaceaac47 ("grep: add support for the PCRE v1 JIT API", 2017-05-25),
which did work.
Thus our intention of starting with 1 byte of stack at a maximum of 1
MB didn't happen, we'd always use the 32 KB stack provided by PCRE
v2's jit_machine_stack_exec()[2]. The reason I allocated a custom
stack at all was this advice in pcrejit(3) (same in pcre2jit(3)):
"By default, it uses 32KiB on the machine stack. However, some
large or complicated patterns need more than this"
Since we've haven't had any reports of users running into
PCRE2_ERROR_JIT_STACKLIMIT in the wild I think we can safely assume
that we can just use the library defaults instead and drop this
code. This won't change with the wider use of PCRE v2 in
ed0479ce3d ("Merge branch 'ab/no-kwset' into next", 2019-07-15), a
fixed string search is not a "large or complicated pattern".
For good measure I ran the performance test noted in 94da9193a6,
although the command is simpler now due to my 0f50c8e32c ("Makefile:
remove the NO_R_TO_GCC_LINKER flag", 2019-05-17):
GIT_PERF_REPEAT_COUNT=30 GIT_PERF_LARGE_REPO=~/g/linux GIT_PERF_MAKE_OPTS='-j8 USE_LIBPCRE2=Y CFLAGS=-O3 LIBPCREDIR=/home/avar/g/pcre2/inst' ./run HEAD~ HEAD p7820-grep-engines.sh
Just the /perl/ results are:
Test HEAD~ HEAD
---------------------------------------------------------------------------------------
7820.3: perl grep 'how.to' 0.17(0.27+0.65) 0.17(0.24+0.68) +0.0%
7820.7: perl grep '^how to' 0.16(0.23+0.66) 0.16(0.23+0.67) +0.0%
7820.11: perl grep '[how] to' 0.18(0.35+0.62) 0.18(0.33+0.65) +0.0%
7820.15: perl grep '(e.t[^ ]*|v.ry) rare' 0.17(0.45+0.54) 0.17(0.49+0.50) +0.0%
7820.19: perl grep 'm(ú|u)lt.b(æ|y)te' 0.16(0.33+0.58) 0.16(0.29+0.62) +0.0%
So, as expected there's no change, and running with valgrind reveals
that we have fewer allocations now.
As noted in [3] there are known regexes that will fail with the lower
stack limit, the way GNU grep fixed it is interesting, although I
believe the implementation is overly verbose, they could make PCRE v2
handle that gradual re-allocation, that's what min/max memory is
for.
So we might end up bringing this back, I'm more inclined to just kick
such cases upstairs to PCRE maintainers as a bug, perhaps they'll add
some overall "just allocate more then" flag to make this easier. In
any case there's no functional change here, we didn't have a custom
stack, so let's apply this first, we can always revert it later.
1. https://public-inbox.org/git/20190721194052.15440-1-carenas@gmail.com/
2. I didn't really intend to start with 1 byte, looking at the PCRE v2
code again what happened is that I cargo-culted some of PCRE v2's
own test code which was meant to test re-allocations. It's more
sane to start with say 32 KB with a max of 1 MB, as pcre2grep.c
does.
3. https://public-inbox.org/git/CAPUEspjj+fG8QDmf=bZXktfpLgkgiu34HTjKLhm-cmEE04FE-A@mail.gmail.com/
Reported-by: Carlo Marcelo Arenas Belón <carenas@gmail.com>
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Remove code that would trigger if pcre_config() or pcre2_config() was
so broken that "do we have JIT?" wouldn't return a boolean.
I added this code back in fbaceaac47 ("grep: add support for the PCRE
v1 JIT API", 2017-05-25) and then as noted in f002532784 ("grep: print
the pcre2_jit_on value", 2019-07-22) incorrectly copy/pasted some of
it in 94da9193a6 ("grep: add support for PCRE v2", 2017-06-01).
Let's just remove this code. Being this paranoid about the
pcre2?_config() function itself being broken is crossing the line into
unreasonable paranoia.
Reported-by: Beat Bolli <dev+git@drbeat.li>
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
The list of for-each like macros used by clang-format has been
updated.
* mo/clang-format-for-each-update:
clang-format: use git grep to generate the ForEachMacros list
The URL decoding code has been updated to avoid going past the end
of the string while parsing %-<hex>-<hex> sequence.
* md/url-parse-harden:
url: do not allow %00 to represent NUL in URLs
url: do not read past end of buffer
The description about slashes in gitignore patterns (used to
indicate things like "anchored to this level only" and "only
matches directories") has been revamped.
* an/ignore-doc-update:
gitignore.txt: make slash-rules more readable
The filter_data used in the list-objects-filter (which manages a
lazily sparse clone repository) did not use the dynamic array API
correctly---'nr' is supposed to point at one past the last element
of the array in use. This has been corrected.
* md/list-objects-filter-memfix:
list-objects-filter: correct usage of ALLOC_GROW
"git fetch" into a lazy clone forgot to fetch base objects that are
necessary to complete delta in a thin packfile, which has been
corrected.
* jt/partial-clone-missing-ref-delta-base:
t5616: cover case of client having delta base
t5616: use correct flag to check object is missing
index-pack: prefetch missing REF_DELTA bases
t5616: refactor packfile replacement
When creating a partial clone, the object filtering criteria is
recorded for the origin of the clone, but this incorrectly used a
hardcoded name "origin" to name that remote; it has been corrected
to honor the "--origin <name>" option.
* xl/record-partial-clone-origin:
clone: respect user supplied origin name when setting up partial clone
"git request-pull" learned to warn when the ref we ask them to pull
from in the local repository and in the published repository are
different.
* pb/request-pull-verify-remote-ref:
request-pull: warn if the remote object is not the same as the local one
request-pull: quote regex metacharacters in local ref
The command line to invoke a "git cat-file" command from inside
"git p4" was not properly quoted to protect a caret and running a
broken command on Windows, which has been corrected.
* mm/p4-unshelve-windows-fix:
p4 unshelve: fix "Not a valid object name HEAD0" on Windows
The data collected by fsmonitor was not properly written back to
the on-disk index file, breaking t7519 tests occasionally, which
has been corrected.
* js/fsmonitor-unflake:
mark_fsmonitor_valid(): mark the index as changed if needed
fill_stat_cache_info(): prepare for an fsmonitor fix
"git merge --squash" is designed to update the working tree and the
index without creating the commit, and this cannot be countermanded
by adding the "--commit" option; the command now refuses to work
when both options are given.
* vv/merge-squash-with-explicit-commit:
merge: refuse --commit with --squash
"git bundle verify" needs to see if prerequisite objects exist in
the receiving repository, but the command did not check if we are
in a repository upfront, which has been corrected.
* js/bundle-verify-require-object-store:
bundle verify: error out if called without an object database
"git am -i --resolved" segfaulted after trying to see a commit as
if it were a tree, which has been corrected.
* jk/am-i-resolved-fix:
am: fix --interactive HEAD tree resolution
am: drop tty requirement for --interactive
am: read interactive input from stdin
am: simplify prompt response handling
The server side support for "git fetch" used to show incorrect
value for the HEAD symbolic ref when the namespace feature is in
use, which has been corrected.
* jk/HEAD-symref-in-xfer-namespaces:
upload-pack: strip namespace from symref data
"git update-server-info" used to leave stale packfiles in its
output, which has been corrected.
* ew/server-info-remove-crufts:
server-info: do not list unlinked packs
