475 lines
12 KiB
C
475 lines
12 KiB
C
/* CLI Definitions for GDB, the GNU debugger.
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Copyright (C) 2002-2018 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "cli-interp.h"
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#include "interps.h"
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#include "event-top.h"
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#include "ui-out.h"
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#include "cli-out.h"
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#include "top.h" /* for "execute_command" */
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#include "event-top.h"
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#include "infrun.h"
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#include "observable.h"
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#include "gdbthread.h"
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#include "thread-fsm.h"
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cli_interp_base::cli_interp_base (const char *name)
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: interp (name)
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{}
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cli_interp_base::~cli_interp_base ()
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{}
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/* The console interpreter. */
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class cli_interp final : public cli_interp_base
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{
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public:
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explicit cli_interp (const char *name);
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void init (bool top_level) override;
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void resume () override;
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void suspend () override;
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gdb_exception exec (const char *command_str) override;
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ui_out *interp_ui_out () override;
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/* The ui_out for the console interpreter. */
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cli_ui_out *cli_uiout;
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};
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cli_interp::cli_interp (const char *name)
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: cli_interp_base (name)
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{
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/* Create a default uiout builder for the CLI. */
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this->cli_uiout = cli_out_new (gdb_stdout);
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}
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/* Suppress notification struct. */
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struct cli_suppress_notification cli_suppress_notification =
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{
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0 /* user_selected_context_changed */
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};
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/* Returns the INTERP's data cast as cli_interp if INTERP is a CLI,
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and returns NULL otherwise. */
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static struct cli_interp *
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as_cli_interp (struct interp *interp)
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{
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if (strcmp (interp_name (interp), INTERP_CONSOLE) == 0)
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return (struct cli_interp *) interp;
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return NULL;
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}
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/* Longjmp-safe wrapper for "execute_command". */
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static struct gdb_exception safe_execute_command (struct ui_out *uiout,
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const char *command,
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int from_tty);
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/* See cli-interp.h.
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Breakpoint hits should always be mirrored to a console. Deciding
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what to mirror to a console wrt to breakpoints and random stops
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gets messy real fast. E.g., say "s" trips on a breakpoint. We'd
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clearly want to mirror the event to the console in this case. But
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what about more complicated cases like "s&; thread n; s&", and one
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of those steps spawning a new thread, and that thread hitting a
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breakpoint? It's impossible in general to track whether the thread
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had any relation to the commands that had been executed. So we
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just simplify and always mirror breakpoints and random events to
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all consoles.
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OTOH, we should print the source line to the console when stepping
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or other similar commands, iff the step was started by that console
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(or in MI's case, by a console command), but not if it was started
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with MI's -exec-step or similar. */
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int
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should_print_stop_to_console (struct interp *console_interp,
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struct thread_info *tp)
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{
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if ((bpstat_what (tp->control.stop_bpstat).main_action
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== BPSTAT_WHAT_STOP_NOISY)
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|| tp->thread_fsm == NULL
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|| tp->thread_fsm->command_interp == console_interp
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|| !thread_fsm_finished_p (tp->thread_fsm))
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return 1;
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return 0;
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}
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/* Observers for several run control events. If the interpreter is
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quiet (i.e., another interpreter is being run with
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interpreter-exec), print nothing. */
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/* Observer for the normal_stop notification. */
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static void
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cli_on_normal_stop (struct bpstats *bs, int print_frame)
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{
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if (!print_frame)
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return;
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SWITCH_THRU_ALL_UIS ()
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{
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struct interp *interp = top_level_interpreter ();
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struct cli_interp *cli = as_cli_interp (interp);
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struct thread_info *thread;
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if (cli == NULL)
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continue;
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thread = inferior_thread ();
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if (should_print_stop_to_console (interp, thread))
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print_stop_event (cli->cli_uiout);
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}
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}
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/* Observer for the signal_received notification. */
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static void
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cli_on_signal_received (enum gdb_signal siggnal)
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{
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SWITCH_THRU_ALL_UIS ()
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{
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struct cli_interp *cli = as_cli_interp (top_level_interpreter ());
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if (cli == NULL)
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continue;
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print_signal_received_reason (cli->cli_uiout, siggnal);
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}
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}
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/* Observer for the end_stepping_range notification. */
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static void
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cli_on_end_stepping_range (void)
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{
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SWITCH_THRU_ALL_UIS ()
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{
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struct cli_interp *cli = as_cli_interp (top_level_interpreter ());
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if (cli == NULL)
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continue;
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print_end_stepping_range_reason (cli->cli_uiout);
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}
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}
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/* Observer for the signalled notification. */
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static void
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cli_on_signal_exited (enum gdb_signal siggnal)
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{
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SWITCH_THRU_ALL_UIS ()
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{
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struct cli_interp *cli = as_cli_interp (top_level_interpreter ());
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if (cli == NULL)
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continue;
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print_signal_exited_reason (cli->cli_uiout, siggnal);
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}
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}
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/* Observer for the exited notification. */
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static void
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cli_on_exited (int exitstatus)
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{
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SWITCH_THRU_ALL_UIS ()
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{
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struct cli_interp *cli = as_cli_interp (top_level_interpreter ());
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if (cli == NULL)
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continue;
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print_exited_reason (cli->cli_uiout, exitstatus);
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}
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}
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/* Observer for the no_history notification. */
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static void
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cli_on_no_history (void)
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{
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SWITCH_THRU_ALL_UIS ()
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{
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struct cli_interp *cli = as_cli_interp (top_level_interpreter ());
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if (cli == NULL)
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continue;
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print_no_history_reason (cli->cli_uiout);
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}
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}
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/* Observer for the sync_execution_done notification. */
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static void
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cli_on_sync_execution_done (void)
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{
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struct cli_interp *cli = as_cli_interp (top_level_interpreter ());
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if (cli == NULL)
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return;
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display_gdb_prompt (NULL);
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}
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/* Observer for the command_error notification. */
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static void
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cli_on_command_error (void)
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{
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struct cli_interp *cli = as_cli_interp (top_level_interpreter ());
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if (cli == NULL)
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return;
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display_gdb_prompt (NULL);
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}
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/* Observer for the user_selected_context_changed notification. */
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static void
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cli_on_user_selected_context_changed (user_selected_what selection)
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{
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struct thread_info *tp;
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/* This event is suppressed. */
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if (cli_suppress_notification.user_selected_context)
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return;
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tp = find_thread_ptid (inferior_ptid);
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SWITCH_THRU_ALL_UIS ()
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{
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struct cli_interp *cli = as_cli_interp (top_level_interpreter ());
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if (cli == NULL)
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continue;
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if (selection & USER_SELECTED_INFERIOR)
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print_selected_inferior (cli->cli_uiout);
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if (tp != NULL
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&& ((selection & (USER_SELECTED_THREAD | USER_SELECTED_FRAME))))
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print_selected_thread_frame (cli->cli_uiout, selection);
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}
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}
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/* pre_command_loop implementation. */
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void
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cli_interp_base::pre_command_loop ()
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{
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display_gdb_prompt (0);
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}
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/* These implement the cli out interpreter: */
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void
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cli_interp::init (bool top_level)
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{
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}
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void
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cli_interp::resume ()
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{
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struct ui *ui = current_ui;
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struct cli_interp *cli = this;
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struct ui_file *stream;
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/*sync_execution = 1; */
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/* gdb_setup_readline will change gdb_stdout. If the CLI was
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previously writing to gdb_stdout, then set it to the new
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gdb_stdout afterwards. */
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stream = cli->cli_uiout->set_stream (gdb_stdout);
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if (stream != gdb_stdout)
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{
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cli->cli_uiout->set_stream (stream);
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stream = NULL;
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}
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gdb_setup_readline (1);
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ui->input_handler = command_line_handler;
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if (stream != NULL)
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cli->cli_uiout->set_stream (gdb_stdout);
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}
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void
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cli_interp::suspend ()
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{
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gdb_disable_readline ();
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}
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gdb_exception
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cli_interp::exec (const char *command_str)
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{
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struct cli_interp *cli = this;
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struct ui_file *old_stream;
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struct gdb_exception result;
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/* gdb_stdout could change between the time cli_uiout was
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initialized and now. Since we're probably using a different
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interpreter which has a new ui_file for gdb_stdout, use that one
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instead of the default.
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It is important that it gets reset everytime, since the user
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could set gdb to use a different interpreter. */
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old_stream = cli->cli_uiout->set_stream (gdb_stdout);
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result = safe_execute_command (cli->cli_uiout, command_str, 1);
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cli->cli_uiout->set_stream (old_stream);
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return result;
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}
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bool
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cli_interp_base::supports_command_editing ()
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{
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return true;
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}
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static struct gdb_exception
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safe_execute_command (struct ui_out *command_uiout, const char *command,
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int from_tty)
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{
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struct gdb_exception e = exception_none;
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struct ui_out *saved_uiout;
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/* Save and override the global ``struct ui_out'' builder. */
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saved_uiout = current_uiout;
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current_uiout = command_uiout;
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TRY
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{
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execute_command (command, from_tty);
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}
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CATCH (exception, RETURN_MASK_ALL)
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{
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e = exception;
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}
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END_CATCH
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/* Restore the global builder. */
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current_uiout = saved_uiout;
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/* FIXME: cagney/2005-01-13: This shouldn't be needed. Instead the
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caller should print the exception. */
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exception_print (gdb_stderr, e);
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return e;
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}
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ui_out *
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cli_interp::interp_ui_out ()
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{
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struct cli_interp *cli = (struct cli_interp *) this;
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return cli->cli_uiout;
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}
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/* These hold the pushed copies of the gdb output files.
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If NULL then nothing has yet been pushed. */
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struct saved_output_files
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{
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ui_file *out;
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ui_file *err;
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ui_file *log;
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ui_file *targ;
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ui_file *targerr;
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};
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static saved_output_files saved_output;
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/* See cli-interp.h. */
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void
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cli_interp_base::set_logging (ui_file_up logfile, bool logging_redirect)
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{
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if (logfile != NULL)
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{
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saved_output.out = gdb_stdout;
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saved_output.err = gdb_stderr;
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saved_output.log = gdb_stdlog;
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saved_output.targ = gdb_stdtarg;
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saved_output.targerr = gdb_stdtargerr;
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/* A raw pointer since ownership is transferred to
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gdb_stdout. */
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ui_file *output = make_logging_output (gdb_stdout,
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std::move (logfile),
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logging_redirect);
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gdb_stdout = output;
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gdb_stdlog = output;
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gdb_stderr = output;
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gdb_stdtarg = output;
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gdb_stdtargerr = output;
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}
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else
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{
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/* Only delete one of the files -- they are all set to the same
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value. */
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delete gdb_stdout;
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gdb_stdout = saved_output.out;
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gdb_stderr = saved_output.err;
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gdb_stdlog = saved_output.log;
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gdb_stdtarg = saved_output.targ;
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gdb_stdtargerr = saved_output.targerr;
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saved_output.out = NULL;
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saved_output.err = NULL;
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saved_output.log = NULL;
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saved_output.targ = NULL;
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saved_output.targerr = NULL;
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}
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}
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/* Factory for CLI interpreters. */
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static struct interp *
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cli_interp_factory (const char *name)
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{
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return new cli_interp (name);
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}
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/* Standard gdb initialization hook. */
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void
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_initialize_cli_interp (void)
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{
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interp_factory_register (INTERP_CONSOLE, cli_interp_factory);
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/* If changing this, remember to update tui-interp.c as well. */
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gdb::observers::normal_stop.attach (cli_on_normal_stop);
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gdb::observers::end_stepping_range.attach (cli_on_end_stepping_range);
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gdb::observers::signal_received.attach (cli_on_signal_received);
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gdb::observers::signal_exited.attach (cli_on_signal_exited);
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gdb::observers::exited.attach (cli_on_exited);
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gdb::observers::no_history.attach (cli_on_no_history);
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gdb::observers::sync_execution_done.attach (cli_on_sync_execution_done);
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gdb::observers::command_error.attach (cli_on_command_error);
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gdb::observers::user_selected_context_changed.attach
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(cli_on_user_selected_context_changed);
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}
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