/* Handling of inferior events for the event loop for GDB, the GNU debugger.
- Copyright (C) 1999, 2007, 2008 Free Software Foundation, Inc.
+ Copyright (C) 1999-2014 Free Software Foundation, Inc.
Written by Elena Zannoni <ezannoni@cygnus.com> of Cygnus Solutions.
This file is part of GDB.
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/>. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
-#include "inferior.h" /* For fetch_inferior_event. */
-#include "target.h" /* For enum inferior_event_type. */
+#include "inferior.h"
+#include "infrun.h"
+#include "target.h" /* For enum inferior_event_type. */
#include "event-loop.h"
#include "event-top.h"
#include "inf-loop.h"
#include "remote.h"
#include "exceptions.h"
#include "language.h"
+#include "gdbthread.h"
+#include "continuations.h"
+#include "interps.h"
+#include "top.h"
+#include "observer.h"
-static int fetch_inferior_event_wrapper (gdb_client_data client_data);
-
-void
-inferior_event_handler_wrapper (gdb_client_data client_data)
-{
- inferior_event_handler (INF_QUIT_REQ, client_data);
-}
-
-/* General function to handle events in the inferior. So far it just
+/* General function to handle events in the inferior. So far it just
takes care of detecting errors reported by select() or poll(),
otherwise it assumes that all is OK, and goes on reading data from
- the fd. This however may not always be what we want to do. */
+ the fd. This however may not always be what we want to do. */
void
inferior_event_handler (enum inferior_event_type event_type,
gdb_client_data client_data)
{
- int was_sync = 0;
+ struct cleanup *cleanup_if_error = make_bpstat_clear_actions_cleanup ();
+
switch (event_type)
{
- case INF_ERROR:
- printf_unfiltered (_("error detected from target.\n"));
- target_async (NULL, 0);
- pop_target ();
- discard_all_continuations ();
- async_enable_stdin ();
- break;
-
case INF_REG_EVENT:
- /* Use catch errors for now, until the inner layers of
+ /* Catch errors for now, until the inner layers of
fetch_inferior_event (i.e. readchar) can return meaningful
error status. If an error occurs while getting an event from
- the target, just get rid of the target. */
- if (!catch_errors (fetch_inferior_event_wrapper,
- client_data, "", RETURN_MASK_ALL))
- {
- target_async (NULL, 0);
- pop_target ();
- discard_all_continuations ();
- async_enable_stdin ();
- display_gdb_prompt (0);
- }
+ the target, just cancel the current command. */
+ {
+ volatile struct gdb_exception ex;
+
+ TRY_CATCH (ex, RETURN_MASK_ALL)
+ {
+ fetch_inferior_event (client_data);
+ }
+ if (ex.reason < 0)
+ {
+ bpstat_clear_actions ();
+ do_all_intermediate_continuations (1);
+ do_all_continuations (1);
+
+ throw_exception (ex);
+ }
+ }
break;
case INF_EXEC_COMPLETE:
+ if (!non_stop)
+ {
+ /* Unregister the inferior from the event loop. This is done
+ so that when the inferior is not running we don't get
+ distracted by spurious inferior output. */
+ if (target_has_execution)
+ target_async (NULL, 0);
+ }
- /* This is the first thing to do -- so that continuations know that
- the target is stopped. For example, command_line_handler_continuation
- will run breakpoint commands, and if we think that the target is
- running, we'll refuse to execute most commands. MI continuation
- presently uses target_executing to either print or not print *stopped. */
- target_executing = 0;
-
- /* Unregister the inferior from the event loop. This is done so that
- when the inferior is not running we don't get distracted by
- spurious inferior output. */
- if (target_has_execution)
- target_async (NULL, 0);
-
- /* The call to async_enable_stdin below resets 'sync_execution'.
- However, if sync_execution is 1 now, we also need to show the
- prompt below, so save the current value. */
- was_sync = sync_execution;
- async_enable_stdin ();
+ /* Do all continuations associated with the whole inferior (not
+ a particular thread). */
+ if (!ptid_equal (inferior_ptid, null_ptid))
+ do_all_inferior_continuations (0);
/* If we were doing a multi-step (eg: step n, next n), but it
got interrupted by a breakpoint, still do the pending
continuations. The continuation itself is responsible for
- distinguishing the cases. */
- do_all_intermediate_continuations ();
-
- do_all_continuations ();
-
- if (current_language != expected_language)
+ distinguishing the cases. The continuations are allowed to
+ touch the inferior memory, e.g. to remove breakpoints, so run
+ them before running breakpoint commands, which may resume the
+ target. */
+ if (non_stop
+ && target_has_execution
+ && !ptid_equal (inferior_ptid, null_ptid))
+ do_all_intermediate_continuations_thread (inferior_thread (), 0);
+ else
+ do_all_intermediate_continuations (0);
+
+ /* Always finish the previous command before running any
+ breakpoint commands. Any stop cancels the previous command.
+ E.g. a "finish" or "step-n" command interrupted by an
+ unrelated breakpoint is canceled. */
+ if (non_stop
+ && target_has_execution
+ && !ptid_equal (inferior_ptid, null_ptid))
+ do_all_continuations_thread (inferior_thread (), 0);
+ else
+ do_all_continuations (0);
+
+ /* When running a command list (from a user command, say), these
+ are only run when the command list is all done. */
+ if (interpreter_async)
{
- if (language_mode == language_mode_auto)
- {
- language_info (1); /* Print what changed. */
- }
- }
+ volatile struct gdb_exception e;
- /* If the continuation did not start the target again,
- prepare for interation with the user. */
- if (!target_executing)
- {
- if (was_sync)
- {
- display_gdb_prompt (0);
- }
- else
+ check_frame_language_change ();
+
+ /* Don't propagate breakpoint commands errors. Either we're
+ stopping or some command resumes the inferior. The user will
+ be informed. */
+ TRY_CATCH (e, RETURN_MASK_ALL)
{
- if (exec_done_display_p)
- printf_unfiltered (_("completed.\n"));
+ bpstat_do_actions ();
}
+ exception_print (gdb_stderr, e);
}
break;
case INF_EXEC_CONTINUE:
/* Is there anything left to do for the command issued to
- complete? */
- do_all_intermediate_continuations ();
- break;
+ complete? */
- case INF_QUIT_REQ:
- /* FIXME: ezannoni 1999-10-04. This call should really be a
- target vector entry, so that it can be used for any kind of
- targets. */
- async_remote_interrupt_twice (NULL);
+ if (non_stop)
+ do_all_intermediate_continuations_thread (inferior_thread (), 0);
+ else
+ do_all_intermediate_continuations (0);
break;
case INF_TIMER:
printf_unfiltered (_("Event type not recognized.\n"));
break;
}
-}
-static int
-fetch_inferior_event_wrapper (gdb_client_data client_data)
-{
- fetch_inferior_event (client_data);
- return 1;
+ discard_cleanups (cleanup_if_error);
}
projects / deliverable / binutils-gdb.git / blobdiff