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-rw-r--r--arch/x86/kernel/ftrace.c8
-rw-r--r--arch/x86/mm/testmmiotrace.c29
-rw-r--r--include/linux/smp_lock.h21
-rw-r--r--include/trace/events/bkl.h61
-rw-r--r--kernel/trace/ftrace.c68
-rw-r--r--kernel/trace/trace.h36
-rw-r--r--kernel/trace/trace_events.c23
-rw-r--r--kernel/trace/trace_events_filter.c155
-rw-r--r--lib/kernel_lock.c20
9 files changed, 295 insertions, 126 deletions
diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
index 9dbb527e1652..25e6f5fc4b1e 100644
--- a/arch/x86/kernel/ftrace.c
+++ b/arch/x86/kernel/ftrace.c
@@ -9,6 +9,8 @@
* the dangers of modifying code on the run.
*/
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/spinlock.h>
#include <linux/hardirq.h>
#include <linux/uaccess.h>
@@ -336,15 +338,15 @@ int __init ftrace_dyn_arch_init(void *data)
switch (faulted) {
case 0:
- pr_info("ftrace: converting mcount calls to 0f 1f 44 00 00\n");
+ pr_info("converting mcount calls to 0f 1f 44 00 00\n");
memcpy(ftrace_nop, ftrace_test_p6nop, MCOUNT_INSN_SIZE);
break;
case 1:
- pr_info("ftrace: converting mcount calls to 66 66 66 66 90\n");
+ pr_info("converting mcount calls to 66 66 66 66 90\n");
memcpy(ftrace_nop, ftrace_test_nop5, MCOUNT_INSN_SIZE);
break;
case 2:
- pr_info("ftrace: converting mcount calls to jmp . + 5\n");
+ pr_info("converting mcount calls to jmp . + 5\n");
memcpy(ftrace_nop, ftrace_test_jmp, MCOUNT_INSN_SIZE);
break;
}
diff --git a/arch/x86/mm/testmmiotrace.c b/arch/x86/mm/testmmiotrace.c
index 427fd1b56df5..8565d944f7cf 100644
--- a/arch/x86/mm/testmmiotrace.c
+++ b/arch/x86/mm/testmmiotrace.c
@@ -1,12 +1,13 @@
/*
* Written by Pekka Paalanen, 2008-2009 <pq@iki.fi>
*/
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
#include <linux/module.h>
#include <linux/io.h>
#include <linux/mmiotrace.h>
-#define MODULE_NAME "testmmiotrace"
-
static unsigned long mmio_address;
module_param(mmio_address, ulong, 0);
MODULE_PARM_DESC(mmio_address, " Start address of the mapping of 16 kB "
@@ -30,7 +31,7 @@ static unsigned v32(unsigned i)
static void do_write_test(void __iomem *p)
{
unsigned int i;
- pr_info(MODULE_NAME ": write test.\n");
+ pr_info("write test.\n");
mmiotrace_printk("Write test.\n");
for (i = 0; i < 256; i++)
@@ -47,7 +48,7 @@ static void do_read_test(void __iomem *p)
{
unsigned int i;
unsigned errs[3] = { 0 };
- pr_info(MODULE_NAME ": read test.\n");
+ pr_info("read test.\n");
mmiotrace_printk("Read test.\n");
for (i = 0; i < 256; i++)
@@ -68,7 +69,7 @@ static void do_read_test(void __iomem *p)
static void do_read_far_test(void __iomem *p)
{
- pr_info(MODULE_NAME ": read far test.\n");
+ pr_info("read far test.\n");
mmiotrace_printk("Read far test.\n");
ioread32(p + read_far);
@@ -78,7 +79,7 @@ static void do_test(unsigned long size)
{
void __iomem *p = ioremap_nocache(mmio_address, size);
if (!p) {
- pr_err(MODULE_NAME ": could not ioremap, aborting.\n");
+ pr_err("could not ioremap, aborting.\n");
return;
}
mmiotrace_printk("ioremap returned %p.\n", p);
@@ -94,24 +95,22 @@ static int __init init(void)
unsigned long size = (read_far) ? (8 << 20) : (16 << 10);
if (mmio_address == 0) {
- pr_err(MODULE_NAME ": you have to use the module argument "
- "mmio_address.\n");
- pr_err(MODULE_NAME ": DO NOT LOAD THIS MODULE UNLESS"
- " YOU REALLY KNOW WHAT YOU ARE DOING!\n");
+ pr_err("you have to use the module argument mmio_address.\n");
+ pr_err("DO NOT LOAD THIS MODULE UNLESS YOU REALLY KNOW WHAT YOU ARE DOING!\n");
return -ENXIO;
}
- pr_warning(MODULE_NAME ": WARNING: mapping %lu kB @ 0x%08lx in PCI "
- "address space, and writing 16 kB of rubbish in there.\n",
- size >> 10, mmio_address);
+ pr_warning("WARNING: mapping %lu kB @ 0x%08lx in PCI address space, "
+ "and writing 16 kB of rubbish in there.\n",
+ size >> 10, mmio_address);
do_test(size);
- pr_info(MODULE_NAME ": All done.\n");
+ pr_info("All done.\n");
return 0;
}
static void __exit cleanup(void)
{
- pr_debug(MODULE_NAME ": unloaded.\n");
+ pr_debug("unloaded.\n");
}
module_init(init);
diff --git a/include/linux/smp_lock.h b/include/linux/smp_lock.h
index 813be59bf345..2ea1dd1ba21c 100644
--- a/include/linux/smp_lock.h
+++ b/include/linux/smp_lock.h
@@ -24,8 +24,21 @@ static inline int reacquire_kernel_lock(struct task_struct *task)
return 0;
}
-extern void __lockfunc lock_kernel(void) __acquires(kernel_lock);
-extern void __lockfunc unlock_kernel(void) __releases(kernel_lock);
+extern void __lockfunc
+_lock_kernel(const char *func, const char *file, int line)
+__acquires(kernel_lock);
+
+extern void __lockfunc
+_unlock_kernel(const char *func, const char *file, int line)
+__releases(kernel_lock);
+
+#define lock_kernel() do { \
+ _lock_kernel(__func__, __FILE__, __LINE__); \
+} while (0)
+
+#define unlock_kernel() do { \
+ _unlock_kernel(__func__, __FILE__, __LINE__); \
+} while (0)
/*
* Various legacy drivers don't really need the BKL in a specific
@@ -41,8 +54,8 @@ static inline void cycle_kernel_lock(void)
#else
-#define lock_kernel() do { } while(0)
-#define unlock_kernel() do { } while(0)
+#define lock_kernel()
+#define unlock_kernel()
#define release_kernel_lock(task) do { } while(0)
#define cycle_kernel_lock() do { } while(0)
#define reacquire_kernel_lock(task) 0
diff --git a/include/trace/events/bkl.h b/include/trace/events/bkl.h
new file mode 100644
index 000000000000..8abd620a490e
--- /dev/null
+++ b/include/trace/events/bkl.h
@@ -0,0 +1,61 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM bkl
+
+#if !defined(_TRACE_BKL_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_BKL_H
+
+#include <linux/tracepoint.h>
+
+TRACE_EVENT(lock_kernel,
+
+ TP_PROTO(const char *func, const char *file, int line),
+
+ TP_ARGS(func, file, line),
+
+ TP_STRUCT__entry(
+ __field( int, lock_depth )
+ __field_ext( const char *, func, FILTER_PTR_STRING )
+ __field_ext( const char *, file, FILTER_PTR_STRING )
+ __field( int, line )
+ ),
+
+ TP_fast_assign(
+ /* We want to record the lock_depth after lock is acquired */
+ __entry->lock_depth = current->lock_depth + 1;
+ __entry->func = func;
+ __entry->file = file;
+ __entry->line = line;
+ ),
+
+ TP_printk("depth: %d, %s:%d %s()", __entry->lock_depth,
+ __entry->file, __entry->line, __entry->func)
+);
+
+TRACE_EVENT(unlock_kernel,
+
+ TP_PROTO(const char *func, const char *file, int line),
+
+ TP_ARGS(func, file, line),
+
+ TP_STRUCT__entry(
+ __field(int, lock_depth)
+ __field(const char *, func)
+ __field(const char *, file)
+ __field(int, line)
+ ),
+
+ TP_fast_assign(
+ __entry->lock_depth = current->lock_depth;
+ __entry->func = func;
+ __entry->file = file;
+ __entry->line = line;
+ ),
+
+ TP_printk("depth: %d, %s:%d %s()", __entry->lock_depth,
+ __entry->file, __entry->line, __entry->func)
+);
+
+#endif /* _TRACE_BKL_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index f136fe5da07a..1a7f6abd06bf 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -225,7 +225,11 @@ static void ftrace_update_pid_func(void)
if (ftrace_trace_function == ftrace_stub)
return;
+#ifdef CONFIG_HAVE_FUNCTION_TRACE_MCOUNT_TEST
func = ftrace_trace_function;
+#else
+ func = __ftrace_trace_function;
+#endif
if (ftrace_pid_trace) {
set_ftrace_pid_function(func);
@@ -1652,60 +1656,6 @@ ftrace_regex_lseek(struct file *file, loff_t offset, int origin)
return ret;
}
-enum {
- MATCH_FULL,
- MATCH_FRONT_ONLY,
- MATCH_MIDDLE_ONLY,
- MATCH_END_ONLY,
-};
-
-/*
- * (static function - no need for kernel doc)
- *
- * Pass in a buffer containing a glob and this function will
- * set search to point to the search part of the buffer and
- * return the type of search it is (see enum above).
- * This does modify buff.
- *
- * Returns enum type.
- * search returns the pointer to use for comparison.
- * not returns 1 if buff started with a '!'
- * 0 otherwise.
- */
-static int
-ftrace_setup_glob(char *buff, int len, char **search, int *not)
-{
- int type = MATCH_FULL;
- int i;
-
- if (buff[0] == '!') {
- *not = 1;
- buff++;
- len--;
- } else
- *not = 0;
-
- *search = buff;
-
- for (i = 0; i < len; i++) {
- if (buff[i] == '*') {
- if (!i) {
- *search = buff + 1;
- type = MATCH_END_ONLY;
- } else {
- if (type == MATCH_END_ONLY)
- type = MATCH_MIDDLE_ONLY;
- else
- type = MATCH_FRONT_ONLY;
- buff[i] = 0;
- break;
- }
- }
- }
-
- return type;
-}
-
static int ftrace_match(char *str, char *regex, int len, int type)
{
int matched = 0;
@@ -1754,7 +1704,7 @@ static void ftrace_match_records(char *buff, int len, int enable)
int not;
flag = enable ? FTRACE_FL_FILTER : FTRACE_FL_NOTRACE;
- type = ftrace_setup_glob(buff, len, &search, &not);
+ type = filter_parse_regex(buff, len, &search, &not);
search_len = strlen(search);
@@ -1822,7 +1772,7 @@ static void ftrace_match_module_records(char *buff, char *mod, int enable)
}
if (strlen(buff)) {
- type = ftrace_setup_glob(buff, strlen(buff), &search, &not);
+ type = filter_parse_regex(buff, strlen(buff), &search, &not);
search_len = strlen(search);
}
@@ -1987,7 +1937,7 @@ register_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops,
int count = 0;
char *search;
- type = ftrace_setup_glob(glob, strlen(glob), &search, &not);
+ type = filter_parse_regex(glob, strlen(glob), &search, &not);
len = strlen(search);
/* we do not support '!' for function probes */
@@ -2064,7 +2014,7 @@ __unregister_ftrace_function_probe(char *glob, struct ftrace_probe_ops *ops,
else if (glob) {
int not;
- type = ftrace_setup_glob(glob, strlen(glob), &search, &not);
+ type = filter_parse_regex(glob, strlen(glob), &search, &not);
len = strlen(search);
/* we do not support '!' for function probes */
@@ -2509,7 +2459,7 @@ ftrace_set_func(unsigned long *array, int *idx, char *buffer)
return -ENODEV;
/* decode regex */
- type = ftrace_setup_glob(buffer, strlen(buffer), &search, &not);
+ type = filter_parse_regex(buffer, strlen(buffer), &search, &not);
if (not)
return -EINVAL;
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 405cb850b75d..365fb19d9e11 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -699,22 +699,40 @@ struct event_subsystem {
};
struct filter_pred;
+struct regex;
typedef int (*filter_pred_fn_t) (struct filter_pred *pred, void *event,
int val1, int val2);
+typedef int (*regex_match_func)(char *str, struct regex *r, int len);
+
+enum regex_type {
+ MATCH_FULL,
+ MATCH_FRONT_ONLY,
+ MATCH_MIDDLE_ONLY,
+ MATCH_END_ONLY,
+};
+
+struct regex {
+ char pattern[MAX_FILTER_STR_VAL];
+ int len;
+ int field_len;
+ regex_match_func match;
+};
+
struct filter_pred {
- filter_pred_fn_t fn;
- u64 val;
- char str_val[MAX_FILTER_STR_VAL];
- int str_len;
- char *field_name;
- int offset;
- int not;
- int op;
- int pop_n;
+ filter_pred_fn_t fn;
+ u64 val;
+ struct regex regex;
+ char *field_name;
+ int offset;
+ int not;
+ int op;
+ int pop_n;
};
+extern enum regex_type
+filter_parse_regex(char *buff, int len, char **search, int *not);
extern void print_event_filter(struct ftrace_event_call *call,
struct trace_seq *s);
extern int apply_event_filter(struct ftrace_event_call *call,
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index d128f65778e6..5e9ffc33f6db 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -878,9 +878,9 @@ event_subsystem_dir(const char *name, struct dentry *d_events)
"'%s/filter' entry\n", name);
}
- entry = trace_create_file("enable", 0644, system->entry,
- (void *)system->name,
- &ftrace_system_enable_fops);
+ trace_create_file("enable", 0644, system->entry,
+ (void *)system->name,
+ &ftrace_system_enable_fops);
return system->entry;
}
@@ -892,7 +892,6 @@ event_create_dir(struct ftrace_event_call *call, struct dentry *d_events,
const struct file_operations *filter,
const struct file_operations *format)
{
- struct dentry *entry;
int ret;
/*
@@ -910,12 +909,12 @@ event_create_dir(struct ftrace_event_call *call, struct dentry *d_events,
}
if (call->regfunc)
- entry = trace_create_file("enable", 0644, call->dir, call,
- enable);
+ trace_create_file("enable", 0644, call->dir, call,
+ enable);
if (call->id && call->profile_enable)
- entry = trace_create_file("id", 0444, call->dir, call,
- id);
+ trace_create_file("id", 0444, call->dir, call,
+ id);
if (call->define_fields) {
ret = call->define_fields(call);
@@ -924,16 +923,16 @@ event_create_dir(struct ftrace_event_call *call, struct dentry *d_events,
" events/%s\n", call->name);
return ret;
}
- entry = trace_create_file("filter", 0644, call->dir, call,
- filter);
+ trace_create_file("filter", 0644, call->dir, call,
+ filter);
}
/* A trace may not want to export its format */
if (!call->show_format)
return 0;
- entry = trace_create_file("format", 0444, call->dir, call,
- format);
+ trace_create_file("format", 0444, call->dir, call,
+ format);
return 0;
}
diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index 98a6cc5c64ed..92672016da28 100644
--- a/kernel/trace/trace_events_filter.c
+++ b/kernel/trace/trace_events_filter.c
@@ -18,8 +18,6 @@
* Copyright (C) 2009 Tom Zanussi <tzanussi@gmail.com>
*/
-#include <linux/debugfs.h>
-#include <linux/uaccess.h>
#include <linux/module.h>
#include <linux/ctype.h>
#include <linux/mutex.h>
@@ -197,9 +195,9 @@ static int filter_pred_string(struct filter_pred *pred, void *event,
char *addr = (char *)(event + pred->offset);
int cmp, match;
- cmp = strncmp(addr, pred->str_val, pred->str_len);
+ cmp = pred->regex.match(addr, &pred->regex, pred->regex.field_len);
- match = (!cmp) ^ pred->not;
+ match = cmp ^ pred->not;
return match;
}
@@ -211,9 +209,9 @@ static int filter_pred_pchar(struct filter_pred *pred, void *event,
char **addr = (char **)(event + pred->offset);
int cmp, match;
- cmp = strncmp(*addr, pred->str_val, pred->str_len);
+ cmp = pred->regex.match(*addr, &pred->regex, pred->regex.field_len);
- match = (!cmp) ^ pred->not;
+ match = cmp ^ pred->not;
return match;
}
@@ -237,9 +235,9 @@ static int filter_pred_strloc(struct filter_pred *pred, void *event,
char *addr = (char *)(event + str_loc);
int cmp, match;
- cmp = strncmp(addr, pred->str_val, str_len);
+ cmp = pred->regex.match(addr, &pred->regex, str_len);
- match = (!cmp) ^ pred->not;
+ match = cmp ^ pred->not;
return match;
}
@@ -250,6 +248,124 @@ static int filter_pred_none(struct filter_pred *pred, void *event,
return 0;
}
+/* Basic regex callbacks */
+static int regex_match_full(char *str, struct regex *r, int len)
+{
+ if (strncmp(str, r->pattern, len) == 0)
+ return 1;
+ return 0;
+}
+
+static int regex_match_front(char *str, struct regex *r, int len)
+{
+ if (strncmp(str, r->pattern, len) == 0)
+ return 1;
+ return 0;
+}
+
+static int regex_match_middle(char *str, struct regex *r, int len)
+{
+ if (strstr(str, r->pattern))
+ return 1;
+ return 0;
+}
+
+static int regex_match_end(char *str, struct regex *r, int len)
+{
+ char *ptr = strstr(str, r->pattern);
+
+ if (ptr && (ptr[r->len] == 0))
+ return 1;
+ return 0;
+}
+
+/**
+ * filter_parse_regex - parse a basic regex
+ * @buff: the raw regex
+ * @len: length of the regex
+ * @search: will point to the beginning of the string to compare
+ * @not: tell whether the match will have to be inverted
+ *
+ * This passes in a buffer containing a regex and this function will
+ * set search to point to the search part of the buffer and
+ * return the type of search it is (see enum above).
+ * This does modify buff.
+ *
+ * Returns enum type.
+ * search returns the pointer to use for comparison.
+ * not returns 1 if buff started with a '!'
+ * 0 otherwise.
+ */
+enum regex_type filter_parse_regex(char *buff, int len, char **search, int *not)
+{
+ int type = MATCH_FULL;
+ int i;
+
+ if (buff[0] == '!') {
+ *not = 1;
+ buff++;
+ len--;
+ } else
+ *not = 0;
+
+ *search = buff;
+
+ for (i = 0; i < len; i++) {
+ if (buff[i] == '*') {
+ if (!i) {
+ *search = buff + 1;
+ type = MATCH_END_ONLY;
+ } else {
+ if (type == MATCH_END_ONLY)
+ type = MATCH_MIDDLE_ONLY;
+ else
+ type = MATCH_FRONT_ONLY;
+ buff[i] = 0;
+ break;
+ }
+ }
+ }
+
+ return type;
+}
+
+static int filter_build_regex(struct filter_pred *pred)
+{
+ struct regex *r = &pred->regex;
+ char *search, *dup;
+ enum regex_type type;
+ int not;
+
+ type = filter_parse_regex(r->pattern, r->len, &search, &not);
+ dup = kstrdup(search, GFP_KERNEL);
+ if (!dup)
+ return -ENOMEM;
+
+ strcpy(r->pattern, dup);
+ kfree(dup);
+
+ r->len = strlen(r->pattern);
+
+ switch (type) {
+ case MATCH_FULL:
+ r->match = regex_match_full;
+ break;
+ case MATCH_FRONT_ONLY:
+ r->match = regex_match_front;
+ break;
+ case MATCH_MIDDLE_ONLY:
+ r->match = regex_match_middle;
+ break;
+ case MATCH_END_ONLY:
+ r->match = regex_match_end;
+ break;
+ }
+
+ pred->not ^= not;
+
+ return 0;
+}
+
/* return 1 if event matches, 0 otherwise (discard) */
int filter_match_preds(struct ftrace_event_call *call, void *rec)
{
@@ -396,7 +512,7 @@ static void filter_clear_pred(struct filter_pred *pred)
{
kfree(pred->field_name);
pred->field_name = NULL;
- pred->str_len = 0;
+ pred->regex.len = 0;
}
static int filter_set_pred(struct filter_pred *dest,
@@ -660,21 +776,24 @@ static int filter_add_pred(struct filter_parse_state *ps,
}
if (is_string_field(field)) {
- pred->str_len = field->size;
+ ret = filter_build_regex(pred);
+ if (ret)
+ return ret;
- if (field->filter_type == FILTER_STATIC_STRING)
+ if (field->filter_type == FILTER_STATIC_STRING) {
fn = filter_pred_string;
- else if (field->filter_type == FILTER_DYN_STRING)
- fn = filter_pred_strloc;
+ pred->regex.field_len = field->size;
+ } else if (field->filter_type == FILTER_DYN_STRING)
+ fn = filter_pred_strloc;
else {
fn = filter_pred_pchar;
- pred->str_len = strlen(pred->str_val);
+ pred->regex.field_len = strlen(pred->regex.pattern);
}
} else {
if (field->is_signed)
- ret = strict_strtoll(pred->str_val, 0, &val);
+ ret = strict_strtoll(pred->regex.pattern, 0, &val);
else
- ret = strict_strtoull(pred->str_val, 0, &val);
+ ret = strict_strtoull(pred->regex.pattern, 0, &val);
if (ret) {
parse_error(ps, FILT_ERR_ILLEGAL_INTVAL, 0);
return -EINVAL;
@@ -1045,8 +1164,8 @@ static struct filter_pred *create_pred(int op, char *operand1, char *operand2)
return NULL;
}
- strcpy(pred->str_val, operand2);
- pred->str_len = strlen(operand2);
+ strcpy(pred->regex.pattern, operand2);
+ pred->regex.len = strlen(pred->regex.pattern);
pred->op = op;
diff --git a/lib/kernel_lock.c b/lib/kernel_lock.c
index 39f1029e3525..4ebfa5a164d7 100644
--- a/lib/kernel_lock.c
+++ b/lib/kernel_lock.c
@@ -5,10 +5,13 @@
* relegated to obsolescence, but used by various less
* important (or lazy) subsystems.
*/
-#include <linux/smp_lock.h>
#include <linux/module.h>
#include <linux/kallsyms.h>
#include <linux/semaphore.h>
+#include <linux/smp_lock.h>
+
+#define CREATE_TRACE_POINTS
+#include <trace/events/bkl.h>
/*
* The 'big kernel lock'
@@ -113,21 +116,26 @@ static inline void __unlock_kernel(void)
* This cannot happen asynchronously, so we only need to
* worry about other CPU's.
*/
-void __lockfunc lock_kernel(void)
+void __lockfunc _lock_kernel(const char *func, const char *file, int line)
{
- int depth = current->lock_depth+1;
+ int depth = current->lock_depth + 1;
+
+ trace_lock_kernel(func, file, line);
+
if (likely(!depth))
__lock_kernel();
current->lock_depth = depth;
}
-void __lockfunc unlock_kernel(void)
+void __lockfunc _unlock_kernel(const char *func, const char *file, int line)
{
BUG_ON(current->lock_depth < 0);
if (likely(--current->lock_depth < 0))
__unlock_kernel();
+
+ trace_unlock_kernel(func, file, line);
}
-EXPORT_SYMBOL(lock_kernel);
-EXPORT_SYMBOL(unlock_kernel);
+EXPORT_SYMBOL(_lock_kernel);
+EXPORT_SYMBOL(_unlock_kernel);
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-15 23:48:08 +0300