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Signed-off-by: Junio C Hamano <gitster@pobox.com>
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"git range-diff" learned a way to limit the memory consumed by
O(N*N) cost matrix.
* pc/range-diff-memory-limit:
range-diff: add configurable memory limit for cost matrix
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The clear_alloc_state() API function was not fully clearing the
structure for reuse, but since nobody reuses it, replace it with a
variant that frees the structure as well, making the callers simpler.
* ne/alloc-free-and-null:
alloc: fix dangling pointer in alloc_state cleanup
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Adjust to the way newer versions of cURL selectivel enables tracing
options, so that our tests can continue to work.
* jk/curl-global-trace-components:
curl: add support for curl_global_trace() components
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Doc update.
* ag/doc-sendmail-gmail-example-update:
docs: update sendmail docs to use more secure SMTP server for Gmail
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CodingGuidelines now spells out how bitfields are to be written.
* kn/clang-format-bitfields:
Documentation: note styling for bit fields
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"git rev-parse --short" and friends failed to disambiguate two
objects with object names that share common prefix longer than 32
characters, which has been fixed.
* jc/longer-disambiguation-fix:
abbrev: allow extending beyond 32 chars to disambiguate
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A corner case bug in "git log -L..." has been corrected.
* sg/line-log-boundary-fixes:
line-log: show all line ranges touched by the same diff range
line-log: fix assertion error
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Doc mark-up fix.
* jc/doc-includeif-hasconfig-remote-url-fix:
config: document includeIf conditions consistently
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"git send-email" learned to drive "git imap-send" to store already
sent e-mails in an IMAP folder.
* ag/send-email-imap-sent:
send-email: enable copying emails to an IMAP folder without actually sending them
send-email: add ability to send a copy of sent emails to an IMAP folder
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"core.commentChar=auto" that attempts to dynamically pick a
suitable comment character is non-workable, as it is too much
trouble to support for little benefit, and is marked as deprecated.
* pw/3.0-commentchar-auto-deprecation:
commit: print advice when core.commentString=auto
config: warn on core.commentString=auto
breaking-changes: deprecate support for core.commentString=auto
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Doc mark-up fix.
* kh/doc-fast-import-markup-fix:
doc: fast-import: replace literal block with paragraph
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Merges contributions made from three different addresses:
- win@wincent.com (old address, initial contributions in 2007–2009)
- greg@hurrell.net (personal address matching full name, so this one is
the "forever" address; contributions made starting in 2018)
- greg.hurrell@datadoghq.com (current work address, used for recent
contributions)
Signed-off-by: Greg Hurrell <greg.hurrell@datadoghq.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Docfix.
* mm/worktree-doc-typofix:
docs: fix typo in worktree.adoc 'extension'
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Code clean-up.
* rs/object-name-extend-abbrev-len-update:
object-name: declare pointer type of extend_abbrev_len()'s 2nd parameter
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A broken or malicious "git fetch" can say that it has the same
object for many many times, and the upload-pack serving it can
exhaust memory storing them redundantly, which has been corrected.
* ps/upload-pack-oom-protection:
upload-pack: don't ACK non-commits repeatedly in protocol v2
t5530: modernize tests
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Fixes multiple crashes around midx write-out codepaths.
* ds/midx-write-fixes:
midx-write: simplify error cases
midx-write: reenable signed comparison errors
midx-write: use uint32_t for preferred_pack_idx
midx-write: use cleanup when incremental midx fails
midx-write: put failing response value back
midx-write: only load initialized packs
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"repo info" learns a short-hand option "-z" that is the same as
"--format=nul", and learns to report the objects format used in the
repository.
* lo/repo-info-step-2:
repo: add the field objects.format
repo: add the flag -z as an alias for --format=nul
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The bulk-checkin code used to depend on a file-scope static
singleton variable, which has been updated to pass an instance
throughout the callchain.
* jt/de-global-bulk-checkin:
bulk-checkin: use repository variable from transaction
bulk-checkin: require transaction for index_blob_bulk_checkin()
bulk-checkin: remove global transaction state
bulk-checkin: introduce object database transaction structure
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Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Instead of scanning for the remaining items to see if there are
still commits to be explored in the queue, use khash to remember
which items are still on the queue (an unacceptable alternative is
to reserve one object flag bits).
* rs/describe-with-lazy-queue-and-oidset:
describe: use oidset in finish_depth_computation()
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Test updates.
* tc/t0450-harden:
t0450: add allowlist for builtins with missing .adoc
t0450: fix test for out-of-tree builds
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Doc markup fixes.
* kh/doc-markup-fixes:
doc: remove extra backtick for inline-verbatim
doc: add missing backtick for inline-verbatim
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Docfix.
* km/alias-doc-markup-fix:
doc: fix formatting of function-wrap shell alias
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Windows "real-time monitoring" interferes with the execution of
tests and affects negatively in both correctness and performance,
which has been disabled in Gitlab CI.
* ps/gitlab-ci-disable-windows-monitoring:
gitlab-ci: disable realtime monitoring to unbreak Windows jobs
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"git refs exists" that works like "git show-ref --exists" has been
added.
* ms/refs-exists:
t: add test for git refs exists subcommand
t1422: refactor tests to be shareable
t1403: split 'show-ref --exists' tests into a separate file
builtin/refs: add 'exists' subcommand
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Further code clean-up for multi-pack-index code paths.
* ps/object-store-midx-dedup-info:
midx: compute paths via their source
midx: stop duplicating info redundant with its owning source
midx: write multi-pack indices via their source
midx: load multi-pack indices via their source
midx: drop redundant `struct repository` parameter
odb: simplify calling `link_alt_odb_entry()`
odb: return newly created in-memory sources
odb: consistently use "dir" to refer to alternate's directory
odb: allow `odb_find_source()` to fail
odb: store locality in object database sources
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Documentation for "git add" has been updated.
* je/doc-add:
doc: rephrase the purpose of the staging area
doc: git-add: simplify discussion of ignored files
doc: git-add: clarify intro & add an example
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68061e34702 (fast-import: disallow "feature export-marks" by default,
2019-08-29) added the documentation for this option. The second
paragraph is a literal block but it looks like it should just be
a regular paragraph.
Signed-off-by: Kristoffer Haugsbakk <code@khaugsbakk.name>
Acked-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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* 'master' of https://github.com/j6t/git-gui:
git-gui: sync Makefiles with git.git
git-gui: fix error handling of Revert Changes command
git-gui--askyesno (mingw): use Git for Windows' icon, if available
git-gui--askyesno: allow overriding the window title
git gui: set GIT_ASKPASS=git-gui--askpass if not set yet
git-gui: provide question helper for retry fallback on Windows
git-gui: simplify using nice(1)
git-gui: simplify PATH de-duplication
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* 'master' of https://github.com/j6t/gitk:
gitk: add README with usage, build, and contribution details
gitk: fix trackpad scrolling for Tcl/Tk 8.7+
gitk: use <Button-3> for ctx menus on macOS with Tcl 8.7+
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Signed-off-by: Junio C Hamano <gitster@pobox.com>
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A new command "git last-modified" has been added to show the closest
ancestor commit that touched each path.
* tc/last-modified:
last-modified: use Bloom filters when available
t/perf: add last-modified perf script
last-modified: new subcommand to show when files were last modified
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"git ls-files <pathspec>..." should not necessarily have to expand
the index fully if a sparsified directory is excluded by the
pathspec; the code is taught to expand the index on demand to avoid
this.
* ds/ls-files-lazy-unsparse:
ls-files: conditionally leave index sparse
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"git repack --path-walk" lost objects in some corner cases, which
has been corrected.
* ds/path-walk-repack-fix:
path-walk: create initializer for path lists
path-walk: fix setup of pending objects
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Inspired by Ezekiel's recent effort to showcase Rust interface, the
hash function implementation used to hash lines have been updated
to the one used for ELF symbol lookup by Glibc.
* am/xdiff-hash-tweak:
xdiff: optimize xdl_hash_record_verbatim
xdiff: refactor xdl_hash_record()
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Makefile tried to run multiple "cargo build" which would not work
very well; serialize their execution to work it around.
* da/cargo-serialize:
Makefile: build libgit-rs and libgit-sys serially
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In git.git, commit 5309c1e9fb39 (Makefile: set default goals in
makefiles, 2025-02-15) touched two Makefiles in the git-git/ directory.
Import these changes, so that the trees can converge again with the
next merge of this repository into git.git.
Reported-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Johannes Sixt <j6t@kdbg.org>
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* ml/misc-simplifications:
git-gui: simplify using nice(1)
git-gui: simplify PATH de-duplication
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* js/ask-yesno:
git-gui--askyesno (mingw): use Git for Windows' icon, if available
git-gui--askyesno: allow overriding the window title
git gui: set GIT_ASKPASS=git-gui--askpass if not set yet
git-gui: provide question helper for retry fallback on Windows
Signed-off-by: Johannes Sixt <j6t@kdbg.org>
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When a client performs a fetch or clone they can optionally send "have"
lines to tell the server which objects they already have available
locally. These object IDs are stored by the server in an object array so
that it can remember any objects it doesn't have to include in the pack
sent to the client.
While there isn't any reason to do so, clients are free to send the same
"have" line repeatedly. git-upload-pack(1) already knows to handle this
well: every commit it has seen via a "have" line gets marked with the
`THEY_HAVE` flag, and if such a commit is seen repeatedly we know to not
process it another time. This also has the effect that we only store the
object ID once, only, in the `have_obj` array.
There is an edge case though: if the client sends an object ID that does
not refer to a commit we neither store nor check the `THEY_HAVE` flag.
This means that we repeatedly store the same object ID in our `have_obj`
array, with two consequences:
- In protocol v2 we deduplicate ACKs for commits, but not for any
other objects as we send ACKs for every object ID in the `have_obj`
array.
- The `have_obj` array can grow in size indefinitely with both
protocols.
The potentially-more-serious issue is the second one, as we basically
have a way for an adversary to allocate arbitrarily large buffers now.
Ultimately, this doesn't seem to be all that serious though: on my
machine, the growth of that array is at around 4MB/s, and after roughly
five minutes I was only at 1GB RSS. So this is concerning, but only
mildly so.
Fix this bug by storing the `THEY_HAVE` flag independent of the object
type so that we don't store duplicate object IDs in `have_obj` anymore.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Refactor tests to follow modern best practices:
- Merge together tests that set up and verify a single use case.
- Drop empty newlines at the beginning and end of test bodies.
- Don't change directories in the main test body.
- Remove an unused `D` variable.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The write_midx_internal() method uses gotos to jump to a cleanup section to
clear memory before returning 'result'. Since these jumps are more common
for error conditions, initialize 'result' to -1 and then only set it to 0
before returning with success. There are a couple places where we return
with success via a jump.
This has the added benefit that the method now returns -1 on error instead
of an inconsistent 1 or -1.
Signed-off-by: Derrick Stolee <stolee@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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Remove the remaining signed comparison warnings in midx-write.c so that
they can be enforced as errors in the future. After the previous change,
the remaining errors are due to iterator variables named 'i'.
The strategy here involves defining the variable within the for loop
syntax to make sure we use the appropriate bitness for the loop
sentinel. This matters in at least one method where the variable was
compared to uint32_t in some loops and size_t in others.
While adjusting these loops, there were some where the loop boundary was
checking against a uint32_t value _plus one_. These were replaced with
non-strict comparisons, but also the value is checked to not be
UINT32_MAX. Since the value is the number of incremental multi-pack-
indexes, this is not a meaningful restriction. The new die() is about
defensive programming more than it being realistically possible.
Signed-off-by: Derrick Stolee <stolee@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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midx-write.c has the DISABLE_SIGN_COMPARE_WARNINGS macro defined for a
few reasons, but the biggest one is the use of a signed
preferred_pack_idx member inside the write_midx_context struct. The code
currently uses -1 to indicate an unset preferred pack but pack int ids
are normally handled as uint32_t. There are also a few loops that search
for the preferred pack by name and those iterators will need updates to
uint32_t in the next change.
For now, replace the use of -1 with a 'NO_PREFERRED_PACK' macro and an
equality check. The macro stores the max value of a uint32_t, so we
cannot store a preferred pack that appears last in a list of 2^32 total
packs, but that's expected to be unreasonable already. Furthermore, with
this change we end up extending the range from 2^31 possible packs to
2^32-1.
There are some careful things to worry about with initializing the
preferred pack in the struct and using that value when searching for a
preferred pack that was already incorrect but accidentally working when
the index was initialized to zero.
Signed-off-by: Derrick Stolee <stolee@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The incremental mode of writing a multi-pack-index has a few extra
conditions that could lead to failure, but these are currently
short-ciruiting with 'return -1' instead of setting the method's
'result' variable and going to the cleanup tag.
Replace these returns with gotos to avoid memory issues when exiting
early due to error conditions.
Unfortunately, these error conditions are difficult to reproduce with
test cases, which is perhaps one reason why the memory loss was not
caught by existing test cases in memory tracking modes.
Signed-off-by: Derrick Stolee <stolee@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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This instance of setting the result to 1 before going to cleanup was
accidentally removed in fcb2205b77 (midx: implement support for writing
incremental MIDX chains, 2024-08-06). Build upon a test that already deletes
a packfile to verify that this error propagates to full command failure.
Signed-off-by: Derrick Stolee <stolee@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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The fill_packs_from_midx() method was refactored in fcb2205b77 (midx:
implement support for writing incremental MIDX chains, 2024-08-06) to
allow for preferred packfiles and incremental multi-pack-indexes.
However, this led to some conditions that can cause improperly
initialized memory in the context's list of packfiles.
The conditions caring about the preferred pack name or the incremental
flag are currently necessary to load a packfile. But the context is
still being populated with pack_info structs based on the packfile array
for the existing multi-pack-index even if prepare_midx_pack() isn't
called.
Add a new test that breaks under --stress when compiled with
SANITIZE=address. The chosen number of 100 packfiles was selected to get
the --stress output to fail about 50% of the time, while 50 packfiles
could not get a failure in most --stress runs.
The test case is marked as EXPENSIVE not only because of the number of
packfiles it creates, but because some CI environments were reporting
errors during the test that I could not reproduce, specifically around
being unable to open the packfiles or their pack-indexes.
When it fails under SANITIZE=address, it provides the following error:
AddressSanitizer:DEADLYSIGNAL
=================================================================
==3263517==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000027
==3263517==The signal is caused by a READ memory access.
==3263517==Hint: address points to the zero page.
#0 0x562d5d82d1fb in close_pack_windows packfile.c:299
#1 0x562d5d82d3ab in close_pack packfile.c:354
#2 0x562d5d7bfdb4 in write_midx_internal midx-write.c:1490
#3 0x562d5d7c7aec in midx_repack midx-write.c:1795
#4 0x562d5d46fff6 in cmd_multi_pack_index builtin/multi-pack-index.c:305
...
This failure stack trace is disconnected from the real fix because the bad
pointers are accessed later when closing the packfiles from the context.
There are a few different aspects to this fix that are worth noting:
1. We return to the previous behavior of fill_packs_from_midx to not
rely on the incremental flag or existence of a preferred pack.
2. The behavior to scan all layers of an incremental midx is kept, so
this is not a full revert of the change.
3. We skip allocating more room in the pack_info array if the pack
fails prepare_midx_pack().
4. The method has always returned 0 for success and 1 for failure, but
the condition checking for error added a check for a negative result
for failure, so that is now updated.
5. The call to open_pack_index() is removed, but this is needed later
in the case of a preferred pack. That call is moved to immediately
before its result is needed (checking for the object count).
Signed-off-by: Derrick Stolee <stolee@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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All callers of clear_alloc_state() immediately free what they
cleared, so currently it does not hurt anybody that the
alloc_state is left in an unreusable state, but it is an
error-prone API. Replace it with a new function that clears but
in addition frees the structure, as well as NULLing the pointer
that points at it and adjust existing callers.
As it is a moral equivalent of FREE_AND_NULL(), except that what it
frees has internal structure that needs to be cleaned, allow the
helper to be called twice in a row, by making a call with a pointer
to a pointer variable that already is NULLed.
While at it, rename allocate_alloc_state() and name the new
function alloc_state_free_and_null(), to follow more closely the
function naming convention specified in the CodingGuidelines
(namely, functions about S are named with S_ prefix and then
verb).
Signed-off-by: ノウラ | Flare <nouraellm@gmail.com>
Helped-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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