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dbm_gdb.c
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dbm_gdb.c
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/*
* dbm_gdm.c
*
* Copyright 2010 Alexander Petukhov <devel(at)apetukhov.ru>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
/*
* Implementation of struct _dbg_module for GDB
*/
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#include <wctype.h>
#include <unistd.h>
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <geanyplugin.h>
extern GeanyFunctions *geany_functions;
extern GeanyData *geany_data;
#include "breakpoint.h"
#include "debug_module.h"
/* module features */
#define MODULE_FEATURES MF_ASYNC_BREAKS
/* GDB spawn flags */
#define GDB_SPAWN_FLAGS \
G_SPAWN_SEARCH_PATH | \
G_SPAWN_DO_NOT_REAP_CHILD
/* GDB prompt */
#define GDB_PROMPT "(gdb) \n"
/* enumeration for GDB command execution status */
typedef enum _result_class {
RC_DONE,
RC_EXIT,
RC_ERROR
} result_class;
/* structure to keep async command data (command line, messages) */
typedef struct _queue_item {
GString *message;
GString *command;
GString *error_message;
gboolean format_error_message;
} queue_item;
/* enumeration for stop reason */
enum sr {
SR_BREAKPOINT_HIT,
SR_END_STEPPING_RANGE,
SR_EXITED_NORMALLY,
SR_SIGNAL_RECIEVED,
SR_EXITED_SIGNALLED,
SR_EXITED_WITH_CODE,
} stop_reason;
/* callbacks to use for messaging, error reporting and state change alerting */
static dbg_callbacks* dbg_cbs;
/* GDB command line arguments*/
static const gchar *gdb_args[] = { "gdb", "-i=mi", NULL };
/* GDB pid*/
static GPid gdb_pid = 0;
/* target pid*/
static GPid target_pid = 0;
/* GSource to watch GDB exit */
static GSource *gdb_src;
/* channels for GDB input/output */
static gint gdb_in;
static gint gdb_out;
static GIOChannel *gdb_ch_in;
static GIOChannel *gdb_ch_out;
/* GDB output event source id */
static guint gdb_id_out;
/* buffer for the error message */
char err_message[1000];
/* flag, showing that on debugger stop we have to call a callback */
gboolean requested_interrupt = FALSE;
/* autos list */
static GList *autos = NULL;
/* watches list */
static GList *watches = NULL;
/* loaded files list */
static GList *files = NULL;
/* set to true if library was loaded/unloaded
and it's nessesary to refresh files list */
static gboolean file_refresh_needed = FALSE;
/* current frame number */
static int active_frame = 0;
/* forward declarations */
void stop();
variable* add_watch(gchar* expression);
void update_watches();
void update_autos();
void update_files();
/*
* print message using color, based on message type
*/
void colorize_message(gchar *message)
{
const gchar *color;
if ('=' == *message)
color = "rose";
else if ('^' == *message)
color = "brown";
else if ('*' == *message)
color = "blue";
else if ('~' == *message)
color = "grey";
else
color = "red";
dbg_cbs->send_message(message, color);
}
/*
* shutdown GIOChannel
*/
static void shutdown_channel(GIOChannel ** ch)
{
if (*ch)
{
GError *err = NULL;
gint fd = g_io_channel_unix_get_fd(*ch);
g_io_channel_shutdown(*ch, TRUE, &err);
g_io_channel_unref(*ch);
*ch = NULL;
if (fd >= 0)
{
close(fd);
}
}
}
/*
* called on GDB exit
*/
static void on_gdb_exit(GPid pid, gint status, gpointer data)
{
gdb_pid = target_pid = 0;
g_spawn_close_pid(pid);
shutdown_channel(&gdb_ch_in);
shutdown_channel(&gdb_ch_out);
/* delete autos */
g_list_foreach(autos, (GFunc)g_free, NULL);
g_list_free(autos);
autos = NULL;
/* delete watches */
g_list_foreach(watches, (GFunc)g_free, NULL);
g_list_free(watches);
watches = NULL;
/* delete files */
g_list_foreach(files, (GFunc)g_free, NULL);
g_list_free(files);
files = NULL;
g_source_destroy(gdb_src);
dbg_cbs->set_exited(0);
}
/*
* reads gdb_out until "(gdb)" prompt met
*/
static GList* read_until_prompt()
{
GList *lines = NULL;
gchar *line = NULL;
gsize terminator;
while (G_IO_STATUS_NORMAL == g_io_channel_read_line(gdb_ch_out, &line, NULL, &terminator, NULL))
{
if (!strcmp(GDB_PROMPT, line))
break;
line[terminator] = '\0';
lines = g_list_append (lines, line);
}
return lines;
}
/*
* write a command to a gdb channel and flush with a newlinw character
*/
void gdb_input_write_line(const gchar *line)
{
GIOStatus st;
GError *err = NULL;
gsize count;
char command[1000];
sprintf(command, "%s\n", line);
while (strlen(command))
{
st = g_io_channel_write_chars(gdb_ch_in, command, strlen(command), &count, &err);
strcpy(command, command + count);
if (err || (st == G_IO_STATUS_ERROR) || (st == G_IO_STATUS_EOF))
{
#ifdef DEBUG_OUTPUT
dbg_cbs->send_message(err->message, "red");
#endif
break;
}
}
st = g_io_channel_flush(gdb_ch_in, &err);
if (err || (st == G_IO_STATUS_ERROR) || (st == G_IO_STATUS_EOF))
{
#ifdef DEBUG_OUTPUT
dbg_cbs->send_message(err->message, "red");
#endif
}
}
/*
* free memory occupied by a queue item
*/
static void free_queue_item(queue_item *item)
{
g_string_free(item->message, TRUE);
g_string_free(item->command, TRUE);
g_string_free(item->error_message, TRUE);
g_free(item);
}
/*
* free a list of "queue_item" structures
*/
static void free_commands_queue(GList *queue)
{
/* all commands completed */
queue = g_list_first(queue);
g_list_foreach(queue, (GFunc)free_queue_item, NULL);
g_list_free(queue);
}
/*
* add a new command ("queue_item" structure) to a list
*/
static GList* add_to_queue(GList* queue, const gchar *message, const gchar *command, const gchar *error_message, gboolean format_error_message)
{
queue_item *item = (queue_item*)g_malloc(sizeof(queue_item));
memset((void*)item, 0, sizeof(queue_item));
if (message)
{
item->message = g_string_new(message);
}
item->command = g_string_new(command);
if (error_message)
{
item->error_message = g_string_new(error_message);
}
item->format_error_message = format_error_message;
return g_list_append(queue, (gpointer)item);
}
/*
* asyncronous output reader
* reads from startup async commands.
* looks for a command completion (normal or abnormal), if noraml - executes next command
*/
void exec_async_command(const gchar* command);
static gboolean on_read_async_output(GIOChannel * src, GIOCondition cond, gpointer data)
{
gchar *line;
gsize length;
if (G_IO_STATUS_NORMAL != g_io_channel_read_line(src, &line, NULL, &length, NULL))
return TRUE;
*(line + length) = '\0';
if ('^' == line[0])
{
/* got some result */
g_source_remove(gdb_id_out);
GList *lines = read_until_prompt();
g_list_foreach(lines, (GFunc)g_free, NULL);
g_list_free (lines);
gchar* coma = strchr(line, ',');
if (coma)
{
*coma = '\0';
coma++;
}
else
coma = line + strlen(line);
GList *commands = (GList*)data;
if (!strcmp(line, "^done"))
{
/* command completed succesfully - run next command if exists */
if (commands->next)
{
/* if there are commads left */
commands = commands->next;
queue_item *item = (queue_item*)commands->data;
/* send message to debugger messages window */
if (item->message)
{
dbg_cbs->send_message(item->message->str, "grey");
}
gdb_input_write_line(item->command->str);
gdb_id_out = g_io_add_watch(gdb_ch_out, G_IO_IN, on_read_async_output, commands);
}
else
{
/* all commands completed */
free_commands_queue(commands);
/* removing read callback */
g_source_remove(gdb_id_out);
/* update source files list */
update_files();
/* -exec-run */
exec_async_command("-exec-run &");
}
}
else
{
queue_item *item = (queue_item*)commands->data;
if(item->error_message)
{
if (item->format_error_message)
{
gchar* gdb_msg = g_strcompress(strstr(coma, "msg=\"") + strlen("msg=\""));
GString *msg = g_string_new("");
g_string_printf(msg, item->error_message->str, gdb_msg);
dbg_cbs->report_error(msg->str);
g_free(gdb_msg);
g_string_free(msg, FALSE);
}
else
{
dbg_cbs->report_error(item->error_message->str);
}
}
/* free commands queue */
free_commands_queue(commands);
stop();
}
}
g_free(line);
return TRUE;
}
/*
* asyncronous gdb output reader
* looks for a stopped event, then notifies "debug" module and removes async handler
*/
enum dbs debug_get_state();
static gboolean on_read_from_gdb(GIOChannel * src, GIOCondition cond, gpointer data)
{
gchar *line;
gsize length;
if (G_IO_STATUS_NORMAL != g_io_channel_read_line(src, &line, NULL, &length, NULL))
return TRUE;
gboolean prompt = !strcmp(line, GDB_PROMPT);
*(line + length) = '\0';
if (!prompt)
{
if ('~' == line[0])
{
colorize_message(line);
}
else
{
gchar *compressed = g_strcompress(line);
colorize_message(compressed);
g_free(compressed);
}
}
if (!target_pid && g_str_has_prefix(line, "=thread-group-created"))
{
*(strrchr(line, '\"')) = '\0';
target_pid = atoi(line + strlen("=thread-group-created,id=\""));
}
else if (g_str_has_prefix(line, "=thread-created"))
{
*(strrchr(line, ',') - 1) = '\0';
int thread_id = atoi(line + strlen("=thread-created,id=\""));
dbg_cbs->add_thread(thread_id);
}
else if (g_str_has_prefix(line, "=thread-exited"))
{
*(strrchr(line, ',') - 1) = '\0';
int thread_id = atoi(line + strlen("=thread-exited,id=\""));
dbg_cbs->remove_thread(thread_id);
}
else if (g_str_has_prefix(line, "=library-loaded") || g_str_has_prefix(line, "=library-unloaded"))
{
file_refresh_needed = TRUE;
}
else if (*line == '*')
{
/* asyncronous record found */
char *record = NULL;
if ( (record = strchr(line, ',')) )
{
*record = '\0';
record++;
}
else
record = line + strlen(line);
if (!strcmp(line, "*running"))
dbg_cbs->set_run();
else if (!strcmp(line, "*stopped"))
{
/* removing read callback (will pulling all output left manually) */
g_source_remove(gdb_id_out);
/* looking for a reason to stop */
char *next = NULL;
char *reason = strstr(record, "reason=\"");
if (reason)
{
reason += strlen("reason=\"");
next = strstr(reason, "\"") + 1;
*(next - 1) = '\0';
if (!strcmp(reason, "breakpoint-hit"))
stop_reason = SR_BREAKPOINT_HIT;
else if (!strcmp(reason, "end-stepping-range"))
stop_reason = SR_END_STEPPING_RANGE;
else if (!strcmp(reason, "signal-received"))
stop_reason = SR_SIGNAL_RECIEVED;
else if (!strcmp(reason, "exited-normally"))
stop_reason = SR_EXITED_NORMALLY;
else if (!strcmp(reason, "exited-signalled"))
stop_reason = SR_EXITED_SIGNALLED;
else if (!strcmp(reason, "exited"))
stop_reason = SR_EXITED_WITH_CODE;
}
else
{
/* somehow, sometimes there can be no stop reason */
stop_reason = SR_EXITED_NORMALLY;
}
if (SR_BREAKPOINT_HIT == stop_reason || SR_END_STEPPING_RANGE == stop_reason || SR_SIGNAL_RECIEVED == stop_reason)
{
gchar *thread_id = strstr(reason + strlen(reason) + 1,"thread-id=\"") + strlen("thread-id=\"");
*(strchr(thread_id, '\"')) = '\0';
active_frame = 0;
if (SR_BREAKPOINT_HIT == stop_reason || SR_END_STEPPING_RANGE == stop_reason)
{
/* update autos */
update_autos();
/* update watches */
update_watches();
/* update files */
if (file_refresh_needed)
{
update_files();
file_refresh_needed = FALSE;
}
dbg_cbs->set_stopped(atoi(thread_id));
}
else
{
if (!requested_interrupt)
dbg_cbs->report_error(_("Program received a signal"));
else
requested_interrupt = FALSE;
dbg_cbs->set_stopped(atoi(thread_id));
}
}
else if (stop_reason == SR_EXITED_NORMALLY || stop_reason == SR_EXITED_SIGNALLED || stop_reason == SR_EXITED_WITH_CODE)
{
if (stop_reason == SR_EXITED_WITH_CODE)
{
gchar *code = strstr(reason + strlen(reason) + 1,"exit-code=\"") + strlen("exit-code=\"");
*(strchr(code, '\"')) = '\0';
gchar *message = g_strdup_printf(_("Program exited with code \"%i\""), (int)(char)strtol(code, NULL, 8));
dbg_cbs->report_error(message);
g_free(message);
}
stop();
}
}
}
else if (g_str_has_prefix (line, "^error"))
{
/* removing read callback (will pulling all output left manually) */
g_source_remove(gdb_id_out);
/* set debugger stopped if is running */
if (DBS_STOPPED != debug_get_state())
{
gchar *thread_id = strstr(line + strlen(line) + 1,"thread-id=\"");
*(strchr(thread_id, '\"')) = '\0';
dbg_cbs->set_stopped(atoi(thread_id));
}
/* get message */
char *msg = strstr(line, "msg=\"") + strlen("msg=\"");
*strrchr(msg, '\"') = '\0';
msg = g_strcompress(msg);
/* reading until prompt */
GList *lines = read_until_prompt();
GList *iter = lines;
while(iter)
{
gchar *l = (gchar*)iter->data;
if (strcmp(l, GDB_PROMPT))
colorize_message(l);
g_free(l);
iter = iter->next;
}
g_list_free (lines);
/* send error message */
dbg_cbs->report_error(msg);
g_free(msg);
}
g_free(line);
return TRUE;
}
/*
* execute "command" asyncronously
* after writing command to an input channel
* connects reader to output channel and exits
* after execution
*/
void exec_async_command(const gchar* command)
{
#ifdef DEBUG_OUTPUT
dbg_cbs->send_message(command, "red");
#endif
gdb_input_write_line(command);
/* connect read callback to the output chanel */
gdb_id_out = g_io_add_watch(gdb_ch_out, G_IO_IN, on_read_from_gdb, NULL);
}
/*
* execute "command" syncronously
* i.e. reading output right
* after execution
*/
result_class exec_sync_command(const gchar* command, gboolean wait4prompt, gchar** command_record)
{
#ifdef DEBUG_OUTPUT
dbg_cbs->send_message(command, "red");
#endif
/* write command to gdb input channel */
gdb_input_write_line(command);
if (!wait4prompt)
return RC_DONE;
GList *lines = read_until_prompt();
#ifdef DEBUG_OUTPUT
GList *line = lines;
while (line)
{
dbg_cbs->send_message((gchar*)line->data, "red");
line = line->next;
}
#endif
result_class rc = RC_ERROR;
GList *iter = lines;
while (iter)
{
gchar *line = (gchar*)iter->data;
if ('^' == line[0])
{
gchar* coma = strchr(line, ',');
if (coma)
{
*coma = '\0';
coma++;
}
else
coma = line + strlen(line);
if (command_record)
{
*command_record = (gchar*)g_malloc(strlen(coma) + 1);
strcpy(*command_record, coma);
}
if (!strcmp(line, "^done"))
rc = RC_DONE;
else if (!strcmp(line, "^error"))
{
/* save error message */
gchar* msg = g_strcompress(strstr(coma, "msg=\"") + strlen("msg=\""));
strcpy(err_message, msg);
g_free(msg);
rc = RC_ERROR;
}
else if (!strcmp(line, "^exit"))
rc = RC_EXIT;
}
else if ('&' != line[0])
{
colorize_message (line);
}
iter = iter->next;
}
g_list_foreach(lines, (GFunc)g_free, NULL);
g_list_free(lines);
return rc;
}
/*
* starts gdb, collects commands and start the first one
*/
gboolean run(const gchar* file, const gchar* commandline, GList* env, GList *witer, GList *biter, const gchar* terminal_device, dbg_callbacks* callbacks)
{
GError *err = NULL;
dbg_cbs = callbacks;
/* spawn GDB */
const gchar *exclude[] = { "LANG", NULL };
gchar **gdb_env = utils_copy_environment(exclude, "LANG", "C", NULL);
gchar *working_directory = g_path_get_dirname(file);
if (!g_spawn_async_with_pipes(working_directory, (gchar**)gdb_args, gdb_env,
GDB_SPAWN_FLAGS, NULL,
NULL, &gdb_pid, &gdb_in, &gdb_out, NULL, &err))
{
dbg_cbs->report_error(_("Failed to spawn gdb process"));
g_free(working_directory);
g_strfreev(gdb_env);
return FALSE;
}
g_free(working_directory);
g_strfreev(gdb_env);
/* move gdb to it's own process group */
setpgid(gdb_pid, 0);
/* set handler for gdb process exit event */
g_child_watch_add(gdb_pid, on_gdb_exit, NULL);
gdb_src = g_child_watch_source_new(gdb_pid);
/* create GDB GIO chanels */
gdb_ch_in = g_io_channel_unix_new(gdb_in);
gdb_ch_out = g_io_channel_unix_new(gdb_out);
/* reading starting gdb messages */
GList *lines = read_until_prompt();
GList *line = lines;
while (line)
{
gchar *unescaped = g_strcompress((gchar*)line->data);
if (strlen(unescaped))
{
colorize_message((gchar*)line->data);
}
line = line->next;
}
g_list_foreach(lines, (GFunc)g_free, NULL);
g_list_free(lines);
/* add initial watches to the list */
while (witer)
{
gchar *name = (gchar*)witer->data;
variable *var = variable_new(name, VT_WATCH);
watches = g_list_append(watches, var);
witer = witer->next;
}
/* collect commands */
GList *commands = NULL;
/* loading file */
GString *command = g_string_new("");
g_string_printf(command, "-file-exec-and-symbols \"%s\"", file);
commands = add_to_queue(commands, _("~\"Loading target file.\\n\""), command->str, _("Error loading file"), FALSE);
g_string_free(command, TRUE);
/* setting asyncronous mode */
commands = add_to_queue(commands, NULL, "-gdb-set target-async 1", _("Error configuring GDB"), FALSE);
/* setting null-stop array printing */
commands = add_to_queue(commands, NULL, "-interpreter-exec console \"set print null-stop\"", _("Error configuring GDB"), FALSE);
/* enable pretty printing */
commands = add_to_queue(commands, NULL, "-enable-pretty-printing", _("Error configuring GDB"), FALSE);
/* set locale */
command = g_string_new("");
g_string_printf(command, "-gdb-set environment LANG=%s", g_getenv("LANG"));
commands = add_to_queue(commands, NULL, command->str, NULL, FALSE);
g_string_free(command, TRUE);
/* set arguments */
command = g_string_new("");
g_string_printf(command, "-exec-arguments %s", commandline);
commands = add_to_queue(commands, NULL, command->str, NULL, FALSE);
g_string_free(command, TRUE);
/* set passed evironment */
GList *iter = env;
while (iter)
{
gchar *name = (gchar*)iter->data;
iter = iter->next;
gchar *value = (gchar*)iter->data;
command = g_string_new("");
g_string_printf(command, "-gdb-set environment %s=%s", name, value);
commands = add_to_queue(commands, NULL, command->str, NULL, FALSE);
g_string_free(command, TRUE);
iter = iter->next;
}
/* set breaks */
int bp_index = 1;
while (biter)
{
breakpoint *bp = (breakpoint*)biter->data;
command = g_string_new("");
g_string_printf(command, "-break-insert -f \"\\\"%s\\\":%i\"", bp->file, bp->line);
GString *error_message = g_string_new("");
g_string_printf(error_message, _("Breakpoint at %s:%i cannot be set\nDebugger message: %s"), bp->file, bp->line, "%s");
commands = add_to_queue(commands, NULL, command->str, error_message->str, TRUE);
g_string_free(command, TRUE);
if (bp->hitscount)
{
command = g_string_new("");
g_string_printf(command, "-break-after %i %i", bp_index, bp->hitscount);
commands = add_to_queue(commands, NULL, command->str, error_message->str, TRUE);
g_string_free(command, TRUE);
}
if (strlen(bp->condition))
{
command = g_string_new("");
g_string_printf (command, "-break-condition %i %s", bp_index, bp->condition);
commands = add_to_queue(commands, NULL, command->str, error_message->str, TRUE);
g_string_free(command, TRUE);
}
if (!bp->enabled)
{
command = g_string_new("");
g_string_printf (command, "-break-disable %i", bp_index);
commands = add_to_queue(commands, NULL, command->str, error_message->str, TRUE);
g_string_free(command, TRUE);
}
g_string_free(error_message, TRUE);
bp_index++;
biter = biter->next;
}
/* set debugging terminal */
command = g_string_new("-inferior-tty-set ");
g_string_append(command, terminal_device);
commands = add_to_queue(commands, NULL, command->str, NULL, FALSE);
g_string_free(command, TRUE);
/* connect read callback to the output chanel */
gdb_id_out = g_io_add_watch(gdb_ch_out, G_IO_IN, on_read_async_output, commands);
queue_item *item = (queue_item*)commands->data;
/* send message to debugger messages window */
if (item->message)
{
dbg_cbs->send_message(item->message->str, "grey");
}
/* send first command */
gdb_input_write_line(item->command->str);
return TRUE;
}
/*
* starts debugging
*/
void restart(char* terminal_device)
{
dbg_cbs->clear_messages();
exec_async_command("-exec-run &");
}
/*
* stops GDB
*/
void stop()
{
exec_sync_command("-gdb-exit", FALSE, NULL);
}
/*
* resumes GDB
*/
void resume()
{
exec_async_command("-exec-continue");
}
/*
* step over
*/
void step_over()
{
exec_async_command("-exec-next");
}
/*
* step into
*/
void step_into()
{
exec_async_command("-exec-step");
}
/*
* step out
*/
void step_out()
{
exec_async_command("-exec-finish");
}
/*
* execute until
*/
void execute_until(const gchar *file, int line)
{
gchar command[1000];
sprintf(command, "-exec-until %s:%i", file, line);
exec_async_command(command);
}
/*
* gets breakpoint number by file and line
*/
int get_break_number(char* file, int line)
{
gchar* record;
exec_sync_command("-break-list", TRUE, &record);
gchar* bstart = record;
while ( (bstart = strstr(bstart, "bkpt=")) )
{
bstart += strlen("bkpt={number=\"");
*strchr(bstart, '\"') = '\0';
int num = atoi(bstart);
bstart += strlen(bstart) + 1;
bstart = strstr(bstart, "original-location=\"") + strlen("original-location=\"");
*strchr(bstart, ':') = '\0';
gchar *fname = bstart;
bstart += strlen(bstart) + 1;
*strchr(bstart, '\"') = '\0';
int bline = atoi(bstart);
gchar *file_quoted = g_strdup_printf("\\\"%s\\\"", file);
int break_found = !strcmp(fname, file_quoted) && bline == line;
g_free(file_quoted);
if (break_found)
{
return num;
}
bstart += strlen(bstart) + 1;
}
free(record);
return -1;
}
/*
* set breakpoint
*/
gboolean set_break(breakpoint* bp, break_set_activity bsa)
{
char command[1000];
if (BSA_NEW_BREAK == bsa)
{
/* new breakpoint */
gchar *record = NULL;
/* 1. insert breakpoint */
sprintf (command, "-break-insert \"\\\"%s\\\":%i\"", bp->file, bp->line);
if (RC_DONE != exec_sync_command(command, TRUE, &record))
{
g_free(record);
sprintf (command, "-break-insert -f \"\\\"%s\\\":%i\"", bp->file, bp->line);
if (RC_DONE != exec_sync_command(command, TRUE, &record))
{
g_free(record);
return FALSE;
}
}
/* lookup break-number */
char *pos = strstr(record, "number=\"") + strlen("number=\"");
*strchr(pos, '\"') = '\0';
int number = atoi(pos);
g_free(record);
/* 2. set hits count if differs from 0 */