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-rw-r--r--docs/devel/qapi-code-gen.rst25
-rw-r--r--docs/devel/tracing.rst2
-rw-r--r--hw/i386/xen/xen-hvm.c6
-rw-r--r--hw/i386/xen/xen-mapcache.c8
-rw-r--r--meson.build3
-rw-r--r--qapi/audio.json1
-rw-r--r--qapi/compat.json1
-rw-r--r--qapi/meson.build7
-rw-r--r--qapi/replay.json1
-rw-r--r--qapi/trace.json1
-rw-r--r--qga/meson.build10
-rw-r--r--scripts/qapi/commands.py100
-rw-r--r--scripts/qapi/gen.py31
-rw-r--r--scripts/qapi/main.py14
-rw-r--r--tests/meson.build10
-rw-r--r--tools/virtiofsd/passthrough_ll.c27
-rw-r--r--trace/meson.build11
17 files changed, 228 insertions, 30 deletions
diff --git a/docs/devel/qapi-code-gen.rst b/docs/devel/qapi-code-gen.rst
index a3b5473089..246709ede8 100644
--- a/docs/devel/qapi-code-gen.rst
+++ b/docs/devel/qapi-code-gen.rst
@@ -1630,6 +1630,9 @@ The following files are generated:
``$(prefix)qapi-commands.h``
Function prototypes for the QMP commands specified in the schema
+ ``$(prefix)qapi-commands.trace-events``
+ Trace event declarations, see :ref:`tracing`.
+
``$(prefix)qapi-init-commands.h``
Command initialization prototype
@@ -1650,6 +1653,13 @@ Example::
void qmp_marshal_my_command(QDict *args, QObject **ret, Error **errp);
#endif /* EXAMPLE_QAPI_COMMANDS_H */
+
+ $ cat qapi-generated/example-qapi-commands.trace-events
+ # AUTOMATICALLY GENERATED, DO NOT MODIFY
+
+ qmp_enter_my_command(const char *json) "%s"
+ qmp_exit_my_command(const char *result, bool succeeded) "%s %d"
+
$ cat qapi-generated/example-qapi-commands.c
[Uninteresting stuff omitted...]
@@ -1689,14 +1699,27 @@ Example::
goto out;
}
+ if (trace_event_get_state_backends(TRACE_QMP_ENTER_MY_COMMAND)) {
+ g_autoptr(GString) req_json = qobject_to_json(QOBJECT(args));
+
+ trace_qmp_enter_my_command(req_json->str);
+ }
+
retval = qmp_my_command(arg.arg1, &err);
- error_propagate(errp, err);
if (err) {
+ trace_qmp_exit_my_command(error_get_pretty(err), false);
+ error_propagate(errp, err);
goto out;
}
qmp_marshal_output_UserDefOne(retval, ret, errp);
+ if (trace_event_get_state_backends(TRACE_QMP_EXIT_MY_COMMAND)) {
+ g_autoptr(GString) ret_json = qobject_to_json(*ret);
+
+ trace_qmp_exit_my_command(ret_json->str, true);
+ }
+
out:
visit_free(v);
v = qapi_dealloc_visitor_new();
diff --git a/docs/devel/tracing.rst b/docs/devel/tracing.rst
index ba83954899..4290ac42ee 100644
--- a/docs/devel/tracing.rst
+++ b/docs/devel/tracing.rst
@@ -1,3 +1,5 @@
+.. _tracing:
+
=======
Tracing
=======
diff --git a/hw/i386/xen/xen-hvm.c b/hw/i386/xen/xen-hvm.c
index 482be95415..cf8e500514 100644
--- a/hw/i386/xen/xen-hvm.c
+++ b/hw/i386/xen/xen-hvm.c
@@ -1087,10 +1087,11 @@ static void handle_ioreq(XenIOState *state, ioreq_t *req)
}
}
-static int handle_buffered_iopage(XenIOState *state)
+static bool handle_buffered_iopage(XenIOState *state)
{
buffered_iopage_t *buf_page = state->buffered_io_page;
buf_ioreq_t *buf_req = NULL;
+ bool handled_ioreq = false;
ioreq_t req;
int qw;
@@ -1144,9 +1145,10 @@ static int handle_buffered_iopage(XenIOState *state)
assert(!req.data_is_ptr);
qatomic_add(&buf_page->read_pointer, qw + 1);
+ handled_ioreq = true;
}
- return req.count;
+ return handled_ioreq;
}
static void handle_buffered_io(void *opaque)
diff --git a/hw/i386/xen/xen-mapcache.c b/hw/i386/xen/xen-mapcache.c
index bd47c3d672..f2ef977963 100644
--- a/hw/i386/xen/xen-mapcache.c
+++ b/hw/i386/xen/xen-mapcache.c
@@ -52,7 +52,7 @@ typedef struct MapCacheEntry {
hwaddr paddr_index;
uint8_t *vaddr_base;
unsigned long *valid_mapping;
- uint8_t lock;
+ uint32_t lock;
#define XEN_MAPCACHE_ENTRY_DUMMY (1 << 0)
uint8_t flags;
hwaddr size;
@@ -355,6 +355,12 @@ tryagain:
if (lock) {
MapCacheRev *reventry = g_malloc0(sizeof(MapCacheRev));
entry->lock++;
+ if (entry->lock == 0) {
+ fprintf(stderr,
+ "mapcache entry lock overflow: "TARGET_FMT_plx" -> %p\n",
+ entry->paddr_index, entry->vaddr_base);
+ abort();
+ }
reventry->dma = dma;
reventry->vaddr_req = mapcache->last_entry->vaddr_base + address_offset;
reventry->paddr_index = mapcache->last_entry->paddr_index;
diff --git a/meson.build b/meson.build
index f025623bab..5dbc9a7a36 100644
--- a/meson.build
+++ b/meson.build
@@ -42,6 +42,7 @@ qemu_icondir = get_option('datadir') / 'icons'
config_host_data = configuration_data()
genh = []
+qapi_trace_events = []
target_dirs = config_host['TARGET_DIRS'].split()
have_linux_user = false
@@ -2558,6 +2559,8 @@ if 'CONFIG_VHOST_USER' in config_host
vhost_user = libvhost_user.get_variable('vhost_user_dep')
endif
+# NOTE: the trace/ subdirectory needs the qapi_trace_events variable
+# that is filled in by qapi/.
subdir('qapi')
subdir('qobject')
subdir('stubs')
diff --git a/qapi/audio.json b/qapi/audio.json
index 693e327c6b..0785e70a50 100644
--- a/qapi/audio.json
+++ b/qapi/audio.json
@@ -1,4 +1,5 @@
# -*- mode: python -*-
+# vim: filetype=python
#
# Copyright (C) 2015-2019 Zoltán Kővágó <DirtY.iCE.hu@gmail.com>
#
diff --git a/qapi/compat.json b/qapi/compat.json
index dd7261ae2a..c53b69fe3f 100644
--- a/qapi/compat.json
+++ b/qapi/compat.json
@@ -1,4 +1,5 @@
# -*- Mode: Python -*-
+# vim: filetype=python
##
# = Compatibility policy
diff --git a/qapi/meson.build b/qapi/meson.build
index c0c49c15e4..656ef0e039 100644
--- a/qapi/meson.build
+++ b/qapi/meson.build
@@ -114,6 +114,7 @@ foreach module : qapi_all_modules
'qapi-events-@0@.h'.format(module),
'qapi-commands-@0@.c'.format(module),
'qapi-commands-@0@.h'.format(module),
+ 'qapi-commands-@0@.trace-events'.format(module),
]
endif
if module.endswith('-target')
@@ -137,6 +138,9 @@ foreach output : qapi_util_outputs
if output.endswith('.h')
genh += qapi_files[i]
endif
+ if output.endswith('.trace-events')
+ qapi_trace_events += qapi_files[i]
+ endif
util_ss.add(qapi_files[i])
i = i + 1
endforeach
@@ -145,6 +149,9 @@ foreach output : qapi_specific_outputs + qapi_nonmodule_outputs
if output.endswith('.h')
genh += qapi_files[i]
endif
+ if output.endswith('.trace-events')
+ qapi_trace_events += qapi_files[i]
+ endif
specific_ss.add(when: 'CONFIG_SOFTMMU', if_true: qapi_files[i])
i = i + 1
endforeach
diff --git a/qapi/replay.json b/qapi/replay.json
index bfd83d7591..b4d1ba253b 100644
--- a/qapi/replay.json
+++ b/qapi/replay.json
@@ -1,4 +1,5 @@
# -*- Mode: Python -*-
+# vim: filetype=python
#
##
diff --git a/qapi/trace.json b/qapi/trace.json
index eedfded512..119509f565 100644
--- a/qapi/trace.json
+++ b/qapi/trace.json
@@ -1,4 +1,5 @@
# -*- mode: python -*-
+# vim: filetype=python
#
# Copyright (C) 2011-2016 Lluís Vilanova <vilanova@ac.upc.edu>
#
diff --git a/qga/meson.build b/qga/meson.build
index 613ecb9802..1ee9dca60b 100644
--- a/qga/meson.build
+++ b/qga/meson.build
@@ -15,10 +15,18 @@ qga_qapi_outputs = [
'qga-qapi-visit.h',
]
+# Problem: to generate trace events, we'd have to add the .trace-events
+# file to qapi_trace_events like we do in qapi/meson.build. Since
+# qapi_trace_events is used by trace/meson.build, we'd have to move
+# subdir('qga') above subdir('trace') in the top-level meson.build.
+# Can't, because it would break the dependency of qga on qemuutil (which
+# depends on trace_ss). Not worth solving now; simply suppress trace
+# event generation instead.
qga_qapi_files = custom_target('QGA QAPI files',
output: qga_qapi_outputs,
input: 'qapi-schema.json',
- command: [ qapi_gen, '-o', 'qga', '-p', 'qga-', '@INPUT0@' ],
+ command: [ qapi_gen, '-o', 'qga', '-p', 'qga-', '@INPUT0@',
+ '--suppress-tracing' ],
depend_files: qapi_gen_depends)
qga_ss = ss.source_set()
diff --git a/scripts/qapi/commands.py b/scripts/qapi/commands.py
index 21001bbd6b..869d799ed2 100644
--- a/scripts/qapi/commands.py
+++ b/scripts/qapi/commands.py
@@ -53,7 +53,8 @@ def gen_command_decl(name: str,
def gen_call(name: str,
arg_type: Optional[QAPISchemaObjectType],
boxed: bool,
- ret_type: Optional[QAPISchemaType]) -> str:
+ ret_type: Optional[QAPISchemaType],
+ gen_tracing: bool) -> str:
ret = ''
argstr = ''
@@ -71,21 +72,67 @@ def gen_call(name: str,
if ret_type:
lhs = 'retval = '
- ret = mcgen('''
+ name = c_name(name)
+ upper = name.upper()
- %(lhs)sqmp_%(c_name)s(%(args)s&err);
- error_propagate(errp, err);
-''',
- c_name=c_name(name), args=argstr, lhs=lhs)
- if ret_type:
+ if gen_tracing:
ret += mcgen('''
+
+ if (trace_event_get_state_backends(TRACE_QMP_ENTER_%(upper)s)) {
+ g_autoptr(GString) req_json = qobject_to_json(QOBJECT(args));
+
+ trace_qmp_enter_%(name)s(req_json->str);
+ }
+ ''',
+ upper=upper, name=name)
+
+ ret += mcgen('''
+
+ %(lhs)sqmp_%(name)s(%(args)s&err);
+''',
+ name=name, args=argstr, lhs=lhs)
+
+ ret += mcgen('''
if (err) {
+''')
+
+ if gen_tracing:
+ ret += mcgen('''
+ trace_qmp_exit_%(name)s(error_get_pretty(err), false);
+''',
+ name=name)
+
+ ret += mcgen('''
+ error_propagate(errp, err);
goto out;
}
+''')
+
+ if ret_type:
+ ret += mcgen('''
qmp_marshal_output_%(c_name)s(retval, ret, errp);
''',
c_name=ret_type.c_name())
+
+ if gen_tracing:
+ if ret_type:
+ ret += mcgen('''
+
+ if (trace_event_get_state_backends(TRACE_QMP_EXIT_%(upper)s)) {
+ g_autoptr(GString) ret_json = qobject_to_json(*ret);
+
+ trace_qmp_exit_%(name)s(ret_json->str, true);
+ }
+ ''',
+ upper=upper, name=name)
+ else:
+ ret += mcgen('''
+
+ trace_qmp_exit_%(name)s("{}", true);
+ ''',
+ name=name)
+
return ret
@@ -122,10 +169,19 @@ def gen_marshal_decl(name: str) -> str:
proto=build_marshal_proto(name))
+def gen_trace(name: str) -> str:
+ return mcgen('''
+qmp_enter_%(name)s(const char *json) "%%s"
+qmp_exit_%(name)s(const char *result, bool succeeded) "%%s %%d"
+''',
+ name=c_name(name))
+
+
def gen_marshal(name: str,
arg_type: Optional[QAPISchemaObjectType],
boxed: bool,
- ret_type: Optional[QAPISchemaType]) -> str:
+ ret_type: Optional[QAPISchemaType],
+ gen_tracing: bool) -> str:
have_args = boxed or (arg_type and not arg_type.is_empty())
if have_args:
assert arg_type is not None
@@ -180,7 +236,7 @@ def gen_marshal(name: str,
}
''')
- ret += gen_call(name, arg_type, boxed, ret_type)
+ ret += gen_call(name, arg_type, boxed, ret_type, gen_tracing)
ret += mcgen('''
@@ -238,11 +294,13 @@ def gen_register_command(name: str,
class QAPISchemaGenCommandVisitor(QAPISchemaModularCVisitor):
- def __init__(self, prefix: str):
+ def __init__(self, prefix: str, gen_tracing: bool):
super().__init__(
prefix, 'qapi-commands',
- ' * Schema-defined QAPI/QMP commands', None, __doc__)
+ ' * Schema-defined QAPI/QMP commands', None, __doc__,
+ gen_tracing=gen_tracing)
self._visited_ret_types: Dict[QAPIGenC, Set[QAPISchemaType]] = {}
+ self._gen_tracing = gen_tracing
def _begin_user_module(self, name: str) -> None:
self._visited_ret_types[self._genc] = set()
@@ -261,6 +319,16 @@ class QAPISchemaGenCommandVisitor(QAPISchemaModularCVisitor):
''',
commands=commands, visit=visit))
+
+ if self._gen_tracing and commands != 'qapi-commands':
+ self._genc.add(mcgen('''
+#include "qapi/qmp/qjson.h"
+#include "trace/trace-%(nm)s_trace_events.h"
+''',
+ nm=c_name(commands, protect=False)))
+ # We use c_name(commands, protect=False) to turn '-' into '_', to
+ # match .underscorify() in trace/meson.build
+
self._genh.add(mcgen('''
#include "%(types)s.h"
@@ -322,7 +390,10 @@ void %(c_prefix)sqmp_init_marshal(QmpCommandList *cmds)
with ifcontext(ifcond, self._genh, self._genc):
self._genh.add(gen_command_decl(name, arg_type, boxed, ret_type))
self._genh.add(gen_marshal_decl(name))
- self._genc.add(gen_marshal(name, arg_type, boxed, ret_type))
+ self._genc.add(gen_marshal(name, arg_type, boxed, ret_type,
+ self._gen_tracing))
+ if self._gen_tracing:
+ self._gen_trace_events.add(gen_trace(name))
with self._temp_module('./init'):
with ifcontext(ifcond, self._genh, self._genc):
self._genc.add(gen_register_command(
@@ -332,7 +403,8 @@ void %(c_prefix)sqmp_init_marshal(QmpCommandList *cmds)
def gen_commands(schema: QAPISchema,
output_dir: str,
- prefix: str) -> None:
- vis = QAPISchemaGenCommandVisitor(prefix)
+ prefix: str,
+ gen_tracing: bool) -> None:
+ vis = QAPISchemaGenCommandVisitor(prefix, gen_tracing)
schema.visit(vis)
vis.write(output_dir)
diff --git a/scripts/qapi/gen.py b/scripts/qapi/gen.py
index 995a97d2b8..113b49134d 100644
--- a/scripts/qapi/gen.py
+++ b/scripts/qapi/gen.py
@@ -192,6 +192,11 @@ class QAPIGenH(QAPIGenC):
return guardend(self.fname)
+class QAPIGenTrace(QAPIGen):
+ def _top(self) -> str:
+ return super()._top() + '# AUTOMATICALLY GENERATED, DO NOT MODIFY\n\n'
+
+
@contextmanager
def ifcontext(ifcond: QAPISchemaIfCond, *args: QAPIGenCCode) -> Iterator[None]:
"""
@@ -244,15 +249,18 @@ class QAPISchemaModularCVisitor(QAPISchemaVisitor):
what: str,
user_blurb: str,
builtin_blurb: Optional[str],
- pydoc: str):
+ pydoc: str,
+ gen_tracing: bool = False):
self._prefix = prefix
self._what = what
self._user_blurb = user_blurb
self._builtin_blurb = builtin_blurb
self._pydoc = pydoc
self._current_module: Optional[str] = None
- self._module: Dict[str, Tuple[QAPIGenC, QAPIGenH]] = {}
+ self._module: Dict[str, Tuple[QAPIGenC, QAPIGenH,
+ Optional[QAPIGenTrace]]] = {}
self._main_module: Optional[str] = None
+ self._gen_tracing = gen_tracing
@property
def _genc(self) -> QAPIGenC:
@@ -264,6 +272,14 @@ class QAPISchemaModularCVisitor(QAPISchemaVisitor):
assert self._current_module is not None
return self._module[self._current_module][1]
+ @property
+ def _gen_trace_events(self) -> QAPIGenTrace:
+ assert self._gen_tracing
+ assert self._current_module is not None
+ gent = self._module[self._current_module][2]
+ assert gent is not None
+ return gent
+
@staticmethod
def _module_dirname(name: str) -> str:
if QAPISchemaModule.is_user_module(name):
@@ -293,7 +309,12 @@ class QAPISchemaModularCVisitor(QAPISchemaVisitor):
basename = self._module_filename(self._what, name)
genc = QAPIGenC(basename + '.c', blurb, self._pydoc)
genh = QAPIGenH(basename + '.h', blurb, self._pydoc)
- self._module[name] = (genc, genh)
+
+ gent: Optional[QAPIGenTrace] = None
+ if self._gen_tracing:
+ gent = QAPIGenTrace(basename + '.trace-events')
+
+ self._module[name] = (genc, genh, gent)
self._current_module = name
@contextmanager
@@ -304,11 +325,13 @@ class QAPISchemaModularCVisitor(QAPISchemaVisitor):
self._current_module = old_module
def write(self, output_dir: str, opt_builtins: bool = False) -> None:
- for name, (genc, genh) in self._module.items():
+ for name, (genc, genh, gent) in self._module.items():
if QAPISchemaModule.is_builtin_module(name) and not opt_builtins:
continue
genc.write(output_dir)
genh.write(output_dir)
+ if gent is not None:
+ gent.write(output_dir)
def _begin_builtin_module(self) -> None:
pass
diff --git a/scripts/qapi/main.py b/scripts/qapi/main.py
index f2ea6e0ce4..fc216a53d3 100644
--- a/scripts/qapi/main.py
+++ b/scripts/qapi/main.py
@@ -32,7 +32,8 @@ def generate(schema_file: str,
output_dir: str,
prefix: str,
unmask: bool = False,
- builtins: bool = False) -> None:
+ builtins: bool = False,
+ gen_tracing: bool = False) -> None:
"""
Generate C code for the given schema into the target directory.
@@ -49,7 +50,7 @@ def generate(schema_file: str,
schema = QAPISchema(schema_file)
gen_types(schema, output_dir, prefix, builtins)
gen_visit(schema, output_dir, prefix, builtins)
- gen_commands(schema, output_dir, prefix)
+ gen_commands(schema, output_dir, prefix, gen_tracing)
gen_events(schema, output_dir, prefix)
gen_introspect(schema, output_dir, prefix, unmask)
@@ -74,6 +75,12 @@ def main() -> int:
parser.add_argument('-u', '--unmask-non-abi-names', action='store_true',
dest='unmask',
help="expose non-ABI names in introspection")
+
+ # Option --suppress-tracing exists so we can avoid solving build system
+ # problems. TODO Drop it when we no longer need it.
+ parser.add_argument('--suppress-tracing', action='store_true',
+ help="suppress adding trace events to qmp marshals")
+
parser.add_argument('schema', action='store')
args = parser.parse_args()
@@ -88,7 +95,8 @@ def main() -> int:
output_dir=args.output_dir,
prefix=args.prefix,
unmask=args.unmask,
- builtins=args.builtins)
+ builtins=args.builtins,
+ gen_tracing=not args.suppress_tracing)
except QAPIError as err:
print(f"{sys.argv[0]}: {str(err)}", file=sys.stderr)
return 1
diff --git a/tests/meson.build b/tests/meson.build
index d5e168d714..079c8f3727 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -32,13 +32,21 @@ test_qapi_outputs = [
'test-qapi-visit.h',
]
+# Problem: to generate trace events, we'd have to add the .trace-events
+# file to qapi_trace_events like we do in qapi/meson.build. Since
+# qapi_trace_events is used by trace/meson.build, we'd have to move
+# subdir('tests') above subdir('trace') in the top-level meson.build.
+# Can't, because it would break the dependency of qga on qemuutil (which
+# depends on trace_ss). Not worth solving now; simply suppress trace
+# event generation instead.
test_qapi_files = custom_target('Test QAPI files',
output: test_qapi_outputs,
input: files('qapi-schema/qapi-schema-test.json',
'qapi-schema/include/sub-module.json',
'qapi-schema/sub-sub-module.json'),
command: [ qapi_gen, '-o', meson.current_build_dir(),
- '-b', '-p', 'test-', '@INPUT0@' ],
+ '-b', '-p', 'test-', '@INPUT0@',
+ '--suppress-tracing' ],
depend_files: qapi_gen_depends)
# meson doesn't like generated output in other directories
diff --git a/tools/virtiofsd/passthrough_ll.c b/tools/virtiofsd/passthrough_ll.c
index 64b5b4fbb1..b3d0674f6d 100644
--- a/tools/virtiofsd/passthrough_ll.c
+++ b/tools/virtiofsd/passthrough_ll.c
@@ -54,6 +54,7 @@
#include <sys/wait.h>
#include <sys/xattr.h>
#include <syslog.h>
+#include <grp.h>
#include "qemu/cutils.h"
#include "passthrough_helpers.h"
@@ -1161,6 +1162,30 @@ static void lo_lookup(fuse_req_t req, fuse_ino_t parent, const char *name)
#define OURSYS_setresuid SYS_setresuid
#endif
+static void drop_supplementary_groups(void)
+{
+ int ret;
+
+ ret = getgroups(0, NULL);
+ if (ret == -1) {
+ fuse_log(FUSE_LOG_ERR, "getgroups() failed with error=%d:%s\n",
+ errno, strerror(errno));
+ exit(1);
+ }
+
+ if (!ret) {
+ return;
+ }
+
+ /* Drop all supplementary groups. We should not need it */
+ ret = setgroups(0, NULL);
+ if (ret == -1) {
+ fuse_log(FUSE_LOG_ERR, "setgroups() failed with error=%d:%s\n",
+ errno, strerror(errno));
+ exit(1);
+ }
+}
+
/*
* Change to uid/gid of caller so that file is created with
* ownership of caller.
@@ -3926,6 +3951,8 @@ int main(int argc, char *argv[])
qemu_init_exec_dir(argv[0]);
+ drop_supplementary_groups();
+
pthread_mutex_init(&lo.mutex, NULL);
lo.inodes = g_hash_table_new(lo_key_hash, lo_key_equal);
lo.root.fd = -1;
diff --git a/trace/meson.build b/trace/meson.build
index 573dd699c6..c4794a1f2a 100644
--- a/trace/meson.build
+++ b/trace/meson.build
@@ -2,10 +2,15 @@
specific_ss.add(files('control-target.c'))
trace_events_files = []
-foreach dir : [ '.' ] + trace_events_subdirs
- trace_events_file = meson.project_source_root() / dir / 'trace-events'
+foreach item : [ '.' ] + trace_events_subdirs + qapi_trace_events
+ if item in qapi_trace_events
+ trace_events_file = item
+ group_name = item.full_path().split('/')[-1].underscorify()
+ else
+ trace_events_file = meson.project_source_root() / item / 'trace-events'
+ group_name = item == '.' ? 'root' : item.underscorify()
+ endif
trace_events_files += [ trace_events_file ]
- group_name = dir == '.' ? 'root' : dir.underscorify()
group = '--group=' + group_name
fmt = '@0@-' + group_name + '.@1@'
generated by cgit v1.2.3 (git 2.26.2) at 2025-02-02 09:21:21 +0000