1 /* CLI Definitions for GDB, the GNU debugger. 2 3 Copyright (c) 2002, 2003, 2007, 2008, 2009, 2010 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 interpreter. */ 34 35 /* Longjmp-safe wrapper for "execute_command". */ 36 static struct gdb_exception safe_execute_command (struct ui_out *uiout, 37 char *command, int from_tty); 38 struct captured_execute_command_args 39 { 40 char *command; 41 int from_tty; 42 }; 43 44 /* These implement the cli out interpreter: */ 45 46 static void * 47 cli_interpreter_init (int top_level) 48 { 49 return NULL; 50 } 51 52 static int 53 cli_interpreter_resume (void *data) 54 { 55 struct ui_file *stream; 56 57 /*sync_execution = 1; */ 58 59 /* gdb_setup_readline will change gdb_stdout. If the CLI was previously 60 writing to gdb_stdout, then set it to the new gdb_stdout afterwards. */ 61 62 stream = cli_out_set_stream (cli_uiout, gdb_stdout); 63 if (stream != gdb_stdout) 64 { 65 cli_out_set_stream (cli_uiout, stream); 66 stream = NULL; 67 } 68 69 gdb_setup_readline (); 70 71 if (stream != NULL) 72 cli_out_set_stream (cli_uiout, gdb_stdout); 73 74 return 1; 75 } 76 77 static int 78 cli_interpreter_suspend (void *data) 79 { 80 gdb_disable_readline (); 81 return 1; 82 } 83 84 /* Don't display the prompt if we are set quiet. */ 85 static int 86 cli_interpreter_display_prompt_p (void *data) 87 { 88 if (interp_quiet_p (NULL)) 89 return 0; 90 else 91 return 1; 92 } 93 94 static struct gdb_exception 95 cli_interpreter_exec (void *data, const char *command_str) 96 { 97 struct ui_file *old_stream; 98 struct gdb_exception result; 99 100 /* FIXME: cagney/2003-02-01: Need to const char *propogate 101 safe_execute_command. */ 102 char *str = strcpy (alloca (strlen (command_str) + 1), command_str); 103 104 /* gdb_stdout could change between the time cli_uiout was initialized 105 and now. Since we're probably using a different interpreter which has 106 a new ui_file for gdb_stdout, use that one instead of the default. 107 108 It is important that it gets reset everytime, since the user could 109 set gdb to use a different interpreter. */ 110 old_stream = cli_out_set_stream (cli_uiout, gdb_stdout); 111 result = safe_execute_command (cli_uiout, str, 1); 112 cli_out_set_stream (cli_uiout, old_stream); 113 return result; 114 } 115 116 static void 117 do_captured_execute_command (struct ui_out *uiout, void *data) 118 { 119 struct captured_execute_command_args *args = 120 (struct captured_execute_command_args *) data; 121 122 execute_command (args->command, args->from_tty); 123 } 124 125 static struct gdb_exception 126 safe_execute_command (struct ui_out *uiout, char *command, int from_tty) 127 { 128 struct gdb_exception e; 129 struct captured_execute_command_args args; 130 131 args.command = command; 132 args.from_tty = from_tty; 133 e = catch_exception (uiout, do_captured_execute_command, &args, 134 RETURN_MASK_ALL); 135 /* FIXME: cagney/2005-01-13: This shouldn't be needed. Instead the 136 caller should print the exception. */ 137 exception_print (gdb_stderr, e); 138 return e; 139 } 140 141 142 /* Standard gdb initialization hook. */ 143 extern initialize_file_ftype _initialize_cli_interp; /* -Wmissing-prototypes */ 144 145 void 146 _initialize_cli_interp (void) 147 { 148 static const struct interp_procs procs = { 149 cli_interpreter_init, /* init_proc */ 150 cli_interpreter_resume, /* resume_proc */ 151 cli_interpreter_suspend, /* suspend_proc */ 152 cli_interpreter_exec, /* exec_proc */ 153 cli_interpreter_display_prompt_p /* prompt_proc_p */ 154 }; 155 struct interp *cli_interp; 156 157 /* Create a default uiout builder for the CLI. */ 158 cli_uiout = cli_out_new (gdb_stdout); 159 cli_interp = interp_new (INTERP_CONSOLE, NULL, cli_uiout, &procs); 160 161 interp_add (cli_interp); 162 } 163