1/* Handling of inferior events for the event loop for GDB, the GNU debugger. 2 Copyright (C) 1999, 2007 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 3 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, see <http://www.gnu.org/licenses/>. */ 19 20#include "defs.h" 21#include "inferior.h" /* For fetch_inferior_event. */ 22#include "target.h" /* For enum inferior_event_type. */ 23#include "event-loop.h" 24#include "event-top.h" 25#include "inf-loop.h" 26#include "remote.h" 27#include "exceptions.h" 28 29static int fetch_inferior_event_wrapper (gdb_client_data client_data); 30static void complete_execution (void); 31 32void 33inferior_event_handler_wrapper (gdb_client_data client_data) 34{ 35 inferior_event_handler (INF_QUIT_REQ, client_data); 36} 37 38/* General function to handle events in the inferior. So far it just 39 takes care of detecting errors reported by select() or poll(), 40 otherwise it assumes that all is OK, and goes on reading data from 41 the fd. This however may not always be what we want to do. */ 42void 43inferior_event_handler (enum inferior_event_type event_type, 44 gdb_client_data client_data) 45{ 46 switch (event_type) 47 { 48 case INF_ERROR: 49 printf_unfiltered (_("error detected from target.\n")); 50 target_async (NULL, 0); 51 pop_target (); 52 discard_all_continuations (); 53 do_exec_error_cleanups (ALL_CLEANUPS); 54 break; 55 56 case INF_REG_EVENT: 57 /* Use catch errors for now, until the inner layers of 58 fetch_inferior_event (i.e. readchar) can return meaningful 59 error status. If an error occurs while getting an event from 60 the target, just get rid of the target. */ 61 if (!catch_errors (fetch_inferior_event_wrapper, 62 client_data, "", RETURN_MASK_ALL)) 63 { 64 target_async (NULL, 0); 65 pop_target (); 66 discard_all_continuations (); 67 do_exec_error_cleanups (ALL_CLEANUPS); 68 display_gdb_prompt (0); 69 } 70 break; 71 72 case INF_EXEC_COMPLETE: 73 /* Is there anything left to do for the command issued to 74 complete? */ 75 do_all_continuations (); 76 /* Reset things after target has stopped for the async commands. */ 77 complete_execution (); 78 break; 79 80 case INF_EXEC_CONTINUE: 81 /* Is there anything left to do for the command issued to 82 complete? */ 83 do_all_intermediate_continuations (); 84 break; 85 86 case INF_QUIT_REQ: 87 /* FIXME: ezannoni 1999-10-04. This call should really be a 88 target vector entry, so that it can be used for any kind of 89 targets. */ 90 async_remote_interrupt_twice (NULL); 91 break; 92 93 case INF_TIMER: 94 default: 95 printf_unfiltered (_("Event type not recognized.\n")); 96 break; 97 } 98} 99 100static int 101fetch_inferior_event_wrapper (gdb_client_data client_data) 102{ 103 fetch_inferior_event (client_data); 104 return 1; 105} 106 107/* Reset proper settings after an asynchronous command has finished. 108 If the execution command was in synchronous mode, register stdin 109 with the event loop, and reset the prompt. */ 110 111static void 112complete_execution (void) 113{ 114 target_executing = 0; 115 116 /* Unregister the inferior from the event loop. This is done so that 117 when the inferior is not running we don't get distracted by 118 spurious inferior output. */ 119 target_async (NULL, 0); 120 121 if (sync_execution) 122 { 123 do_exec_error_cleanups (ALL_CLEANUPS); 124 display_gdb_prompt (0); 125 } 126 else 127 { 128 if (exec_done_display_p) 129 printf_unfiltered (_("completed.\n")); 130 } 131} 132