1 /* CLI Definitions for GDB, the GNU debugger. 2 3 Copyright (c) 2002, 2003, 2007, 2008, 2009, 2010, 2011 4 Free Software Foundation, Inc. 5 6 This file is part of GDB. 7 8 This program is free software; you can redistribute it and/or modify 9 it under the terms of the GNU General Public License as published by 10 the Free Software Foundation; either version 3 of the License, or 11 (at your option) any later version. 12 13 This program is distributed in the hope that it will be useful, 14 but WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 GNU General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 20 21 #include "defs.h" 22 #include "interps.h" 23 #include "wrapper.h" 24 #include "event-top.h" 25 #include "ui-out.h" 26 #include "cli-out.h" 27 #include "top.h" /* for "execute_command" */ 28 #include "gdb_string.h" 29 #include "exceptions.h" 30 31 struct ui_out *cli_uiout; 32 33 /* These are the ui_out and the interpreter for the console 34 interpreter. */ 35 36 /* Longjmp-safe wrapper for "execute_command". */ 37 static struct gdb_exception safe_execute_command (struct ui_out *uiout, 38 char *command, 39 int from_tty); 40 struct captured_execute_command_args 41 { 42 char *command; 43 int from_tty; 44 }; 45 46 /* These implement the cli out interpreter: */ 47 48 static void * 49 cli_interpreter_init (int top_level) 50 { 51 return NULL; 52 } 53 54 static int 55 cli_interpreter_resume (void *data) 56 { 57 struct ui_file *stream; 58 59 /*sync_execution = 1; */ 60 61 /* gdb_setup_readline will change gdb_stdout. If the CLI was 62 previously writing to gdb_stdout, then set it to the new 63 gdb_stdout afterwards. */ 64 65 stream = cli_out_set_stream (cli_uiout, gdb_stdout); 66 if (stream != gdb_stdout) 67 { 68 cli_out_set_stream (cli_uiout, stream); 69 stream = NULL; 70 } 71 72 gdb_setup_readline (); 73 74 if (stream != NULL) 75 cli_out_set_stream (cli_uiout, gdb_stdout); 76 77 return 1; 78 } 79 80 static int 81 cli_interpreter_suspend (void *data) 82 { 83 gdb_disable_readline (); 84 return 1; 85 } 86 87 /* Don't display the prompt if we are set quiet. */ 88 static int 89 cli_interpreter_display_prompt_p (void *data) 90 { 91 if (interp_quiet_p (NULL)) 92 return 0; 93 else 94 return 1; 95 } 96 97 static struct gdb_exception 98 cli_interpreter_exec (void *data, const char *command_str) 99 { 100 struct ui_file *old_stream; 101 struct gdb_exception result; 102 103 /* FIXME: cagney/2003-02-01: Need to const char *propogate 104 safe_execute_command. */ 105 char *str = strcpy (alloca (strlen (command_str) + 1), command_str); 106 107 /* gdb_stdout could change between the time cli_uiout was 108 initialized and now. Since we're probably using a different 109 interpreter which has a new ui_file for gdb_stdout, use that one 110 instead of the default. 111 112 It is important that it gets reset everytime, since the user 113 could set gdb to use a different interpreter. */ 114 old_stream = cli_out_set_stream (cli_uiout, gdb_stdout); 115 result = safe_execute_command (cli_uiout, str, 1); 116 cli_out_set_stream (cli_uiout, old_stream); 117 return result; 118 } 119 120 static void 121 do_captured_execute_command (struct ui_out *uiout, void *data) 122 { 123 struct captured_execute_command_args *args = 124 (struct captured_execute_command_args *) data; 125 126 execute_command (args->command, args->from_tty); 127 } 128 129 static struct gdb_exception 130 safe_execute_command (struct ui_out *uiout, char *command, int from_tty) 131 { 132 struct gdb_exception e; 133 struct captured_execute_command_args args; 134 135 args.command = command; 136 args.from_tty = from_tty; 137 e = catch_exception (uiout, do_captured_execute_command, &args, 138 RETURN_MASK_ALL); 139 /* FIXME: cagney/2005-01-13: This shouldn't be needed. Instead the 140 caller should print the exception. */ 141 exception_print (gdb_stderr, e); 142 return e; 143 } 144 145 146 /* Standard gdb initialization hook. */ 147 extern initialize_file_ftype _initialize_cli_interp; /* -Wmissing-prototypes */ 148 149 void 150 _initialize_cli_interp (void) 151 { 152 static const struct interp_procs procs = { 153 cli_interpreter_init, /* init_proc */ 154 cli_interpreter_resume, /* resume_proc */ 155 cli_interpreter_suspend, /* suspend_proc */ 156 cli_interpreter_exec, /* exec_proc */ 157 cli_interpreter_display_prompt_p /* prompt_proc_p */ 158 }; 159 struct interp *cli_interp; 160 161 /* Create a default uiout builder for the CLI. */ 162 cli_uiout = cli_out_new (gdb_stdout); 163 cli_interp = interp_new (INTERP_CONSOLE, NULL, cli_uiout, &procs); 164 165 interp_add (cli_interp); 166 } 167