| 1 | /* Handling of inferior events for the event loop for GDB, the GNU debugger. |
| 2 | Copyright 1999 Free Software Foundation, Inc. |
| 3 | Written by Elena Zannoni <ezannoni@cygnus.com> of Cygnus Solutions. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 2 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program; if not, write to the Free Software |
| 19 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 20 | Boston, MA 02111-1307, USA. */ |
| 21 | |
| 22 | #include "defs.h" |
| 23 | #include "inferior.h" /* For fetch_inferior_event. */ |
| 24 | #include "target.h" /* For enum inferior_event_type. */ |
| 25 | #include "event-loop.h" |
| 26 | #include "event-top.h" |
| 27 | #include "inf-loop.h" |
| 28 | #include "remote.h" |
| 29 | |
| 30 | static int fetch_inferior_event_wrapper (gdb_client_data client_data); |
| 31 | static void complete_execution (void); |
| 32 | |
| 33 | void |
| 34 | inferior_event_handler_wrapper (gdb_client_data client_data) |
| 35 | { |
| 36 | inferior_event_handler (INF_QUIT_REQ, client_data); |
| 37 | } |
| 38 | |
| 39 | /* General function to handle events in the inferior. So far it just |
| 40 | takes care of detecting errors reported by select() or poll(), |
| 41 | otherwise it assumes that all is OK, and goes on reading data from |
| 42 | the fd. This however may not always be what we want to do. */ |
| 43 | void |
| 44 | inferior_event_handler (enum inferior_event_type event_type, |
| 45 | gdb_client_data client_data) |
| 46 | { |
| 47 | switch (event_type) |
| 48 | { |
| 49 | case INF_ERROR: |
| 50 | printf_unfiltered ("error detected from target.\n"); |
| 51 | target_async (NULL, 0); |
| 52 | pop_target (); |
| 53 | discard_all_continuations (); |
| 54 | do_exec_error_cleanups (ALL_CLEANUPS); |
| 55 | break; |
| 56 | |
| 57 | case INF_REG_EVENT: |
| 58 | /* Use catch errors for now, until the inner layers of |
| 59 | fetch_inferior_event (i.e. readchar) can return meaningful |
| 60 | error status. If an error occurs while getting an event from |
| 61 | the target, just get rid of the target. */ |
| 62 | if (!catch_errors (fetch_inferior_event_wrapper, |
| 63 | client_data, "", RETURN_MASK_ALL)) |
| 64 | { |
| 65 | target_async (NULL, 0); |
| 66 | pop_target (); |
| 67 | discard_all_continuations (); |
| 68 | do_exec_error_cleanups (ALL_CLEANUPS); |
| 69 | display_gdb_prompt (0); |
| 70 | } |
| 71 | break; |
| 72 | |
| 73 | case INF_EXEC_COMPLETE: |
| 74 | /* Is there anything left to do for the command issued to |
| 75 | complete? */ |
| 76 | do_all_continuations (); |
| 77 | /* Reset things after target has stopped for the async commands. */ |
| 78 | complete_execution (); |
| 79 | break; |
| 80 | |
| 81 | case INF_EXEC_CONTINUE: |
| 82 | /* Is there anything left to do for the command issued to |
| 83 | complete? */ |
| 84 | do_all_intermediate_continuations (); |
| 85 | break; |
| 86 | |
| 87 | case INF_QUIT_REQ: |
| 88 | /* FIXME: ezannoni 1999-10-04. This call should really be a |
| 89 | target vector entry, so that it can be used for any kind of |
| 90 | targets. */ |
| 91 | async_remote_interrupt_twice (NULL); |
| 92 | break; |
| 93 | |
| 94 | case INF_TIMER: |
| 95 | default: |
| 96 | printf_unfiltered ("Event type not recognized.\n"); |
| 97 | break; |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | static int |
| 102 | fetch_inferior_event_wrapper (gdb_client_data client_data) |
| 103 | { |
| 104 | fetch_inferior_event (client_data); |
| 105 | return 1; |
| 106 | } |
| 107 | |
| 108 | /* Reset proper settings after an asynchronous command has finished. |
| 109 | If the execution command was in synchronous mode, register stdin |
| 110 | with the event loop, and reset the prompt. */ |
| 111 | |
| 112 | static void |
| 113 | complete_execution (void) |
| 114 | { |
| 115 | target_executing = 0; |
| 116 | |
| 117 | /* Unregister the inferior from the event loop. This is done so that |
| 118 | when the inferior is not running we don't get distracted by |
| 119 | spurious inferior output. */ |
| 120 | target_async (NULL, 0); |
| 121 | |
| 122 | if (sync_execution) |
| 123 | { |
| 124 | do_exec_error_cleanups (ALL_CLEANUPS); |
| 125 | display_gdb_prompt (0); |
| 126 | } |
| 127 | else |
| 128 | { |
| 129 | if (exec_done_display_p) |
| 130 | printf_unfiltered ("completed.\n"); |
| 131 | } |
| 132 | } |