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/* List of target connections for GDB.
Copyright (C) 2017-2023 Free Software Foundation, Inc.
This file is part of GDB.
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 3 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, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "target-connection.h"
#include <map>
#include "inferior.h"
#include "target.h"
#include "observable.h"
/* A map between connection number and representative process_stratum
target. */
static std::map<int, process_stratum_target *> process_targets;
/* The highest connection number ever given to a target. */
static int highest_target_connection_num;
/* See target-connection.h. */
void
connection_list_add (process_stratum_target *t)
{
if (t->connection_number == 0)
{
t->connection_number = ++highest_target_connection_num;
process_targets[t->connection_number] = t;
}
}
/* See target-connection.h. */
void
connection_list_remove (process_stratum_target *t)
{
/* Notify about the connection being removed before we reset the
connection number to zero. */
gdb::observers::connection_removed.notify (t);
process_targets.erase (t->connection_number);
t->connection_number = 0;
}
/* See target-connection.h. */
std::string
make_target_connection_string (process_stratum_target *t)
{
if (t->connection_string () != NULL)
return string_printf ("%s %s", t->shortname (),
t->connection_string ());
else
return t->shortname ();
}
/* Prints the list of target connections and their details on UIOUT.
If REQUESTED_CONNECTIONS is not NULL, it's a list of GDB ids of the
target connections that should be printed. Otherwise, all target
connections are printed. */
static void
print_connection (struct ui_out *uiout, const char *requested_connections)
{
int count = 0;
size_t what_len = 0;
/* Compute number of lines we will print. */
for (const auto &it : process_targets)
{
if (!number_is_in_list (requested_connections, it.first))
continue;
++count;
process_stratum_target *t = it.second;
size_t l = make_target_connection_string (t).length ();
if (l > what_len)
what_len = l;
}
if (count == 0)
{
uiout->message (_("No connections.\n"));
return;
}
ui_out_emit_table table_emitter (uiout, 4, process_targets.size (),
"connections");
uiout->table_header (1, ui_left, "current", "");
uiout->table_header (4, ui_left, "number", "Num");
/* The text in the "what" column may include spaces. Add one extra
space to visually separate the What and Description columns a
little better. Compare:
"* 1 remote :9999 Remote serial target in gdb-specific protocol"
"* 1 remote :9999 Remote serial target in gdb-specific protocol"
*/
uiout->table_header (what_len + 1, ui_left, "what", "What");
uiout->table_header (17, ui_left, "description", "Description");
uiout->table_body ();
for (const auto &it : process_targets)
{
process_stratum_target *t = it.second;
if (!number_is_in_list (requested_connections, t->connection_number))
continue;
ui_out_emit_tuple tuple_emitter (uiout, NULL);
if (current_inferior ()->process_target () == t)
uiout->field_string ("current", "*");
else
uiout->field_skip ("current");
uiout->field_signed ("number", t->connection_number);
uiout->field_string ("what", make_target_connection_string (t));
uiout->field_string ("description", t->longname ());
uiout->text ("\n");
}
}
/* The "info connections" command. */
static void
info_connections_command (const char *args, int from_tty)
{
print_connection (current_uiout, args);
}
void _initialize_target_connection ();
void
_initialize_target_connection ()
{
add_info ("connections", info_connections_command,
_("\
Target connections in use.\n\
Shows the list of target connections currently in use."));
}
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