1 /* CLI Definitions for GDB, the GNU debugger. 2 3 Copyright (c) 2002-2003, 2007-2012 Free Software Foundation, Inc. 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 "interps.h" 22 #include "wrapper.h" 23 #include "event-top.h" 24 #include "ui-out.h" 25 #include "cli-out.h" 26 #include "top.h" /* for "execute_command" */ 27 #include "gdb_string.h" 28 #include "exceptions.h" 29 30 struct ui_out *cli_uiout; 31 32 /* These are the ui_out and the interpreter for the console 33 interpreter. */ 34 35 /* Longjmp-safe wrapper for "execute_command". */ 36 static struct gdb_exception safe_execute_command (struct ui_out *uiout, 37 char *command, 38 int from_tty); 39 /* These implement the cli out interpreter: */ 40 41 static void * 42 cli_interpreter_init (struct interp *self, int top_level) 43 { 44 return NULL; 45 } 46 47 static int 48 cli_interpreter_resume (void *data) 49 { 50 struct ui_file *stream; 51 52 /*sync_execution = 1; */ 53 54 /* gdb_setup_readline will change gdb_stdout. If the CLI was 55 previously writing to gdb_stdout, then set it to the new 56 gdb_stdout afterwards. */ 57 58 stream = cli_out_set_stream (cli_uiout, gdb_stdout); 59 if (stream != gdb_stdout) 60 { 61 cli_out_set_stream (cli_uiout, stream); 62 stream = NULL; 63 } 64 65 gdb_setup_readline (); 66 67 if (stream != NULL) 68 cli_out_set_stream (cli_uiout, gdb_stdout); 69 70 return 1; 71 } 72 73 static int 74 cli_interpreter_suspend (void *data) 75 { 76 gdb_disable_readline (); 77 return 1; 78 } 79 80 /* Don't display the prompt if we are set quiet. */ 81 static int 82 cli_interpreter_display_prompt_p (void *data) 83 { 84 if (interp_quiet_p (NULL)) 85 return 0; 86 else 87 return 1; 88 } 89 90 static struct gdb_exception 91 cli_interpreter_exec (void *data, const char *command_str) 92 { 93 struct ui_file *old_stream; 94 struct gdb_exception result; 95 96 /* FIXME: cagney/2003-02-01: Need to const char *propogate 97 safe_execute_command. */ 98 char *str = strcpy (alloca (strlen (command_str) + 1), command_str); 99 100 /* gdb_stdout could change between the time cli_uiout was 101 initialized and now. Since we're probably using a different 102 interpreter which has a new ui_file for gdb_stdout, use that one 103 instead of the default. 104 105 It is important that it gets reset everytime, since the user 106 could set gdb to use a different interpreter. */ 107 old_stream = cli_out_set_stream (cli_uiout, gdb_stdout); 108 result = safe_execute_command (cli_uiout, str, 1); 109 cli_out_set_stream (cli_uiout, old_stream); 110 return result; 111 } 112 113 static struct gdb_exception 114 safe_execute_command (struct ui_out *command_uiout, char *command, int from_tty) 115 { 116 volatile struct gdb_exception e; 117 struct ui_out *saved_uiout; 118 119 /* Save and override the global ``struct ui_out'' builder. */ 120 saved_uiout = current_uiout; 121 current_uiout = command_uiout; 122 123 TRY_CATCH (e, RETURN_MASK_ALL) 124 { 125 execute_command (command, from_tty); 126 } 127 128 /* Restore the global builder. */ 129 current_uiout = saved_uiout; 130 131 /* FIXME: cagney/2005-01-13: This shouldn't be needed. Instead the 132 caller should print the exception. */ 133 exception_print (gdb_stderr, e); 134 return e; 135 } 136 137 static struct ui_out * 138 cli_ui_out (struct interp *self) 139 { 140 return cli_uiout; 141 } 142 143 /* Standard gdb initialization hook. */ 144 extern initialize_file_ftype _initialize_cli_interp; /* -Wmissing-prototypes */ 145 146 void 147 _initialize_cli_interp (void) 148 { 149 static const struct interp_procs procs = { 150 cli_interpreter_init, /* init_proc */ 151 cli_interpreter_resume, /* resume_proc */ 152 cli_interpreter_suspend, /* suspend_proc */ 153 cli_interpreter_exec, /* exec_proc */ 154 cli_interpreter_display_prompt_p, /* prompt_proc_p */ 155 cli_ui_out /* ui_out_proc */ 156 }; 157 struct interp *cli_interp; 158 159 /* Create a default uiout builder for the CLI. */ 160 cli_uiout = cli_out_new (gdb_stdout); 161 cli_interp = interp_new (INTERP_CONSOLE, &procs); 162 163 interp_add (cli_interp); 164 } 165