X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Ftop.c;h=4749c38180961b3b945c7a4aab24ca687de76366;hb=de4112fa387b662c7c7a1dd3e334a1274ca54d28;hp=7bc55620b7f1864c3faf48b68fc33b50aa4668f3;hpb=73bc900df9bcfe3ce24453219d2303fafb1395de;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/top.c b/gdb/top.c index 7bc55620b7..4749c38180 100644 --- a/gdb/top.c +++ b/gdb/top.c @@ -1,5 +1,8 @@ /* Top level stuff for GDB, the GNU debugger. - Copyright 1986-2000 Free Software Foundation, Inc. + + Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, + 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002 + Free Software Foundation, Inc. This file is part of GDB. @@ -21,9 +24,13 @@ #include "defs.h" #include "gdbcmd.h" #include "call-cmds.h" +#include "cli/cli-cmds.h" +#include "cli/cli-script.h" +#include "cli/cli-setshow.h" +#include "cli/cli-decode.h" #include "symtab.h" #include "inferior.h" -#include "signals.h" +#include #include "target.h" #include "breakpoint.h" #include "gdbtypes.h" @@ -32,8 +39,12 @@ #include "language.h" #include "terminal.h" /* For job_control. */ #include "annotate.h" +#include "completer.h" #include "top.h" #include "version.h" +#include "serial.h" +#include "doublest.h" +#include "gdb_assert.h" /* readline include files */ #include @@ -50,110 +61,8 @@ #include "gdb_string.h" #include "gdb_stat.h" #include -#ifdef UI_OUT #include "ui-out.h" #include "cli-out.h" -#endif - -/* Prototypes for local functions */ - -static void dont_repeat_command (char *, int); - -static void source_cleanup_lines (PTR); - -static void user_defined_command (char *, int); - -static void init_signals (void); - -#ifdef STOP_SIGNAL -static void stop_sig (int); -#endif - -static char *line_completion_function (char *, int, char *, int); - -static char *readline_line_completion_function (char *, int); - -static void while_command (char *, int); - -static void if_command (char *, int); - -static struct command_line *build_command_line (enum command_control_type, - char *); - -static struct command_line *get_command_line (enum command_control_type, - char *); - -static void realloc_body_list (struct command_line *, int); - -static enum misc_command_type read_next_line (struct command_line **); - -static enum command_control_type -recurse_read_control_structure (struct command_line *); - -static struct cleanup *setup_user_args (char *); - -static char *locate_arg (char *); - -static char *insert_args (char *); - -static void arg_cleanup (void *); - -static void init_main (void); - -static void init_cmd_lists (void); - -static void float_handler (int); - -static void init_signals (void); - -static void set_verbose (char *, int, struct cmd_list_element *); - -static void show_history (char *, int); - -static void set_history (char *, int); - -static void set_history_size_command (char *, int, struct cmd_list_element *); - -static void show_commands (char *, int); - -static void echo_command (char *, int); - -static void pwd_command (char *, int); - -static void show_version (char *, int); - -static void document_command (char *, int); - -static void define_command (char *, int); - -static void validate_comname (char *); - -static void help_command (char *, int); - -static void show_command (char *, int); - -static void info_command (char *, int); - -static void complete_command (char *, int); - -static void do_nothing (int); - -static void show_debug (char *, int); - -static void set_debug (char *, int); - -#ifdef SIGHUP -/* NOTE 1999-04-29: This function will be static again, once we modify - gdb to use the event loop as the default command loop and we merge - event-top.c into this file, top.c */ -/* static */ int quit_cover (PTR); - -static void disconnect (int); -#endif - -static void do_restore_instream_cleanup (void *stream); - -static struct cleanup *make_cleanup_free_command_lines (struct command_line **); /* Default command line prompt. This is overriden in some configs. */ @@ -181,88 +90,6 @@ extern char lang_frame_mismatch_warn[]; /* language.c */ int caution = 1; /* Default is yes, sigh. */ -/* Define all cmd_list_elements. */ - -/* Chain containing all defined commands. */ - -struct cmd_list_element *cmdlist; - -/* Chain containing all defined info subcommands. */ - -struct cmd_list_element *infolist; - -/* Chain containing all defined enable subcommands. */ - -struct cmd_list_element *enablelist; - -/* Chain containing all defined disable subcommands. */ - -struct cmd_list_element *disablelist; - -/* Chain containing all defined toggle subcommands. */ - -struct cmd_list_element *togglelist; - -/* Chain containing all defined stop subcommands. */ - -struct cmd_list_element *stoplist; - -/* Chain containing all defined delete subcommands. */ - -struct cmd_list_element *deletelist; - -/* Chain containing all defined "enable breakpoint" subcommands. */ - -struct cmd_list_element *enablebreaklist; - -/* Chain containing all defined set subcommands */ - -struct cmd_list_element *setlist; - -/* Chain containing all defined unset subcommands */ - -struct cmd_list_element *unsetlist; - -/* Chain containing all defined show subcommands. */ - -struct cmd_list_element *showlist; - -/* Chain containing all defined \"set history\". */ - -struct cmd_list_element *sethistlist; - -/* Chain containing all defined \"show history\". */ - -struct cmd_list_element *showhistlist; - -/* Chain containing all defined \"unset history\". */ - -struct cmd_list_element *unsethistlist; - -/* Chain containing all defined maintenance subcommands. */ - -struct cmd_list_element *maintenancelist; - -/* Chain containing all defined "maintenance info" subcommands. */ - -struct cmd_list_element *maintenanceinfolist; - -/* Chain containing all defined "maintenance print" subcommands. */ - -struct cmd_list_element *maintenanceprintlist; - -struct cmd_list_element *setprintlist; - -struct cmd_list_element *showprintlist; - -struct cmd_list_element *setdebuglist; - -struct cmd_list_element *showdebuglist; - -struct cmd_list_element *setchecklist; - -struct cmd_list_element *showchecklist; - /* stdio stream that command input is being read from. Set to stdin normally. Set by source_command to the file we are sourcing. Set to NULL if we are executing a user-defined command or interacting via a GUI. */ @@ -287,7 +114,6 @@ int xgdb_verbose; /* gdb prints this when reading a command interactively */ static char *gdb_prompt_string; /* the global prompt string */ -extern char *get_prompt (void); /* access function for prompt string */ /* Buffer used for reading command lines, and the size allocated for it so far. */ @@ -345,21 +171,6 @@ int target_executing = 0; /* Level of control structure. */ static int control_level; -/* Structure for arguments to user defined functions. */ -#define MAXUSERARGS 10 -struct user_args - { - struct user_args *next; - struct - { - char *arg; - int len; - } - a[MAXUSERARGS]; - int count; - } - *user_args; - /* Signal to catch ^Z typed while reading a command: SIGTSTP or SIGCONT. */ #ifndef STOP_SIGNAL @@ -369,23 +180,13 @@ static void stop_sig (int); #endif #endif -/* Some System V have job control but not sigsetmask(). */ -#if !defined (HAVE_SIGSETMASK) -#if !defined (USG) -#define HAVE_SIGSETMASK 1 -#else -#define HAVE_SIGSETMASK 0 -#endif -#endif - -#if 0 == (HAVE_SIGSETMASK) -#define sigsetmask(n) -#endif - /* Hooks for alternate command interfaces. */ /* Called after most modules have been initialized, but before taking users - command file. */ + command file. + + If the UI fails to initialize and it wants GDB to continue + using the default UI, then it should clear this hook before returning. */ void (*init_ui_hook) (char *argv0); @@ -396,7 +197,7 @@ void (*init_ui_hook) (char *argv0); int (*ui_loop_hook) (int); /* Called instead of command_loop at top level. Can be invoked via - return_to_top_level. */ + throw_exception(). */ void (*command_loop_hook) (void); @@ -462,7 +263,8 @@ void (*memory_changed_hook) (CORE_ADDR addr, int len); /* Called when going to wait for the target. Usually allows the GUI to run while waiting for target events. */ -int (*target_wait_hook) (int pid, struct target_waitstatus * status); +ptid_t (*target_wait_hook) (ptid_t ptid, + struct target_waitstatus * status); /* Used by UI as a wrapper around command execution. May do various things like enabling/disabling buttons, etc... */ @@ -489,21 +291,21 @@ NORETURN void (*error_hook) (void) ATTR_NORETURN; directly. */ #if defined(HAVE_SIGSETJMP) #define SIGJMP_BUF sigjmp_buf -#define SIGSETJMP(buf) sigsetjmp(buf, 1) -#define SIGLONGJMP(buf,val) siglongjmp(buf,val) +#define SIGSETJMP(buf) sigsetjmp((buf), 1) +#define SIGLONGJMP(buf,val) siglongjmp((buf), (val)) #else #define SIGJMP_BUF jmp_buf #define SIGSETJMP(buf) setjmp(buf) -#define SIGLONGJMP(buf,val) longjmp(buf,val) +#define SIGLONGJMP(buf,val) longjmp((buf), (val)) #endif -/* Where to go for return_to_top_level. */ +/* Where to go for throw_exception(). */ static SIGJMP_BUF *catch_return; /* Return for reason REASON to the nearest containing catch_errors(). */ NORETURN void -return_to_top_level (enum return_reason reason) +throw_exception (enum return_reason reason) { quit_flag = 0; immediate_quit = 0; @@ -537,10 +339,11 @@ return_to_top_level (enum return_reason reason) (NORETURN void) SIGLONGJMP (*catch_return, (int) reason); } -/* Call FUNC with arg ARGS, catching any errors. If there is no - error, return the value returned by FUNC. If there is an error, - print ERRSTRING, print the specific error message, then return - zero. +/* Call FUNC() with args FUNC_UIOUT and FUNC_ARGS, catching any + errors. Set FUNC_CAUGHT to an ``enum return_reason'' if the + function is aborted (using throw_exception() or zero if the + function returns normally. Set FUNC_VAL to the value returned by + the function or 0 if the function was aborted. Must not be called with immediate_quit in effect (bad things might happen, say we got a signal in the middle of a memcpy to quit_return). @@ -568,21 +371,30 @@ return_to_top_level (enum return_reason reason) be consolidated into a single file instead of being distributed between utils.c and top.c? */ -int -catch_errors (catch_errors_ftype *func, PTR args, char *errstring, - return_mask mask) +static void +catcher (catch_exceptions_ftype *func, + struct ui_out *func_uiout, + void *func_args, + int *func_val, + enum return_reason *func_caught, + char *errstring, + return_mask mask) { SIGJMP_BUF *saved_catch; SIGJMP_BUF catch; - int val; struct cleanup *saved_cleanup_chain; char *saved_error_pre_print; char *saved_quit_pre_print; + struct ui_out *saved_uiout; /* Return value from SIGSETJMP(): enum return_reason if error or quit caught, 0 otherwise. */ int caught; + /* Return value from FUNC(): Hopefully non-zero. Explicitly set to + zero if an error quit was caught. */ + int val; + /* Override error/quit messages during FUNC. */ saved_error_pre_print = error_pre_print; @@ -593,6 +405,11 @@ catch_errors (catch_errors_ftype *func, PTR args, char *errstring, if (mask & RETURN_MASK_QUIT) quit_pre_print = errstring; + /* Override the global ``struct ui_out'' builder. */ + + saved_uiout = uiout; + uiout = func_uiout; + /* Prevent error/quit during FUNC from calling cleanups established prior to here. */ @@ -604,7 +421,9 @@ catch_errors (catch_errors_ftype *func, PTR args, char *errstring, catch_return = &catch; caught = SIGSETJMP (catch); if (!caught) - val = (*func) (args); + val = (*func) (func_uiout, func_args); + else + val = 0; catch_return = saved_catch; /* FIXME: cagney/1999-11-05: A correct FUNC implementation will @@ -614,47 +433,78 @@ catch_errors (catch_errors_ftype *func, PTR args, char *errstring, do_cleanups call (to cover the problem) or an assertion check to detect bad FUNCs code. */ - /* Restore the cleanup chain and error/quit messages to their - original states. */ + /* Restore the cleanup chain, the error/quit messages, and the uiout + builder, to their original states. */ restore_cleanups (saved_cleanup_chain); + uiout = saved_uiout; + if (mask & RETURN_MASK_QUIT) quit_pre_print = saved_quit_pre_print; if (mask & RETURN_MASK_ERROR) error_pre_print = saved_error_pre_print; - /* Return normally if no error/quit event occurred. */ + /* Return normally if no error/quit event occurred or this catcher + can handle this exception. The caller analyses the func return + values. */ - if (!caught) - return val; + if (!caught || (mask & RETURN_MASK (caught))) + { + *func_val = val; + *func_caught = caught; + return; + } - /* If the caller didn't request that the event be caught, relay the + /* The caller didn't request that the event be caught, relay the event to the next containing catch_errors(). */ - if (!(mask & RETURN_MASK (caught))) - return_to_top_level (caught); - - /* Tell the caller that an event was caught. - - FIXME: nsd/2000-02-22: When MASK is RETURN_MASK_ALL, the caller - can't tell what type of event occurred. + throw_exception (caught); +} - A possible fix is to add a new interface, catch_event(), that - returns enum return_reason after catching an error or a quit. +int +catch_exceptions (struct ui_out *uiout, + catch_exceptions_ftype *func, + void *func_args, + char *errstring, + return_mask mask) +{ + int val; + enum return_reason caught; + catcher (func, uiout, func_args, &val, &caught, errstring, mask); + gdb_assert (val >= 0); + gdb_assert (caught <= 0); + if (caught < 0) + return caught; + return val; +} - When returning normally, i.e. without catching an error or a - quit, catch_event() could return RETURN_NORMAL, which would be - added to enum return_reason. FUNC would return information - exclusively via ARGS. +struct catch_errors_args +{ + catch_errors_ftype *func; + void *func_args; +}; - Alternatively, normal catch_event() could return FUNC's return - value. The caller would need to be aware of potential overlap - with enum return_reason, which could be publicly restricted to - negative values to simplify return value processing in FUNC and - in the caller. */ +int +do_catch_errors (struct ui_out *uiout, void *data) +{ + struct catch_errors_args *args = data; + return args->func (args->func_args); +} - return 0; +int +catch_errors (catch_errors_ftype *func, void *func_args, char *errstring, + return_mask mask) +{ + int val; + enum return_reason caught; + struct catch_errors_args args; + args.func = func; + args.func_args = func_args; + catcher (do_catch_errors, uiout, &args, &val, &caught, errstring, mask); + if (caught != 0) + return 0; + return val; } struct captured_command_args @@ -695,28 +545,28 @@ catch_command_errors (catch_command_errors_ftype * command, /* Handler for SIGHUP. */ #ifdef SIGHUP -static void -disconnect (int signo) -{ - catch_errors (quit_cover, NULL, - "Could not kill the program being debugged", RETURN_MASK_ALL); - signal (SIGHUP, SIG_DFL); - kill (getpid (), SIGHUP); -} - /* Just a little helper function for disconnect(). */ /* NOTE 1999-04-29: This function will be static again, once we modify gdb to use the event loop as the default command loop and we merge event-top.c into this file, top.c */ /* static */ int -quit_cover (PTR s) +quit_cover (void *s) { caution = 0; /* Throw caution to the wind -- we're exiting. This prevents asking the user dumb questions. */ quit_command ((char *) 0, 0); return 0; } + +static void +disconnect (int signo) +{ + catch_errors (quit_cover, NULL, + "Could not kill the program being debugged", RETURN_MASK_ALL); + signal (SIGHUP, SIG_DFL); + kill (getpid (), SIGHUP); +} #endif /* defined SIGHUP */ /* Line number we are currently in in a file which is being sourced. */ @@ -749,7 +599,7 @@ static int source_error_allocated; /* Clean up on error during a "source" command (or execution of a user-defined command). */ -static void +void do_restore_instream_cleanup (void *stream) { /* Restore the previous input stream. */ @@ -768,8 +618,6 @@ read_command_file (FILE *stream) do_cleanups (cleanups); } -extern void init_proc (void); - void (*pre_init_ui_hook) (void); #ifdef __MSDOS__ @@ -777,2377 +625,687 @@ void do_chdir_cleanup (void *old_dir) { chdir (old_dir); - free (old_dir); + xfree (old_dir); } #endif +/* Execute the line P as a command. + Pass FROM_TTY as second argument to the defining function. */ + void -gdb_init (char *argv0) +execute_command (char *p, int from_tty) { - if (pre_init_ui_hook) - pre_init_ui_hook (); - - /* Run the init function of each source file */ - - getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)); - current_directory = gdb_dirbuf; - -#ifdef __MSDOS__ - /* Make sure we return to the original directory upon exit, come - what may, since the OS doesn't do that for us. */ - make_final_cleanup (do_chdir_cleanup, xstrdup (current_directory)); -#endif - - init_cmd_lists (); /* This needs to be done first */ - initialize_targets (); /* Setup target_terminal macros for utils.c */ - initialize_utils (); /* Make errors and warnings possible */ - initialize_all_files (); - initialize_current_architecture (); - init_main (); /* But that omits this file! Do it now */ + register struct cmd_list_element *c; + register enum language flang; + static int warned = 0; + char *line; + + free_all_values (); - /* The signal handling mechanism is different depending whether or - not the async version is run. NOTE: in the future we plan to make - the event loop be the default engine of gdb, and this difference - will disappear. */ - if (event_loop_p) - async_init_signals (); - else - init_signals (); + /* Force cleanup of any alloca areas if using C alloca instead of + a builtin alloca. */ + alloca (0); - /* We need a default language for parsing expressions, so simple things like - "set width 0" won't fail if no language is explicitly set in a config file - or implicitly set by reading an executable during startup. */ - set_language (language_c); - expected_language = current_language; /* don't warn about the change. */ + /* This can happen when command_line_input hits end of file. */ + if (p == NULL) + return; -#ifdef UI_OUT - /* Install the default UI */ - uiout = cli_out_new (gdb_stdout); -#endif + serial_log_command (p); -#ifdef UI_OUT - /* All the interpreters should have had a look at things by now. - Initialize the selected interpreter. */ - if (interpreter_p && !init_ui_hook) + while (*p == ' ' || *p == '\t') + p++; + if (*p) { - fprintf_unfiltered (gdb_stderr, "Interpreter `%s' unrecognized.\n", - interpreter_p); - exit (1); - } -#endif + char *arg; + line = p; - if (init_ui_hook) - init_ui_hook (argv0); -} + c = lookup_cmd (&p, cmdlist, "", 0, 1); -/* Allocate, initialize a new command line structure for one of the - control commands (if/while). */ + /* If the target is running, we allow only a limited set of + commands. */ + if (event_loop_p && target_can_async_p () && target_executing) + if (!strcmp (c->name, "help") + && !strcmp (c->name, "pwd") + && !strcmp (c->name, "show") + && !strcmp (c->name, "stop")) + error ("Cannot execute this command while the target is running."); -static struct command_line * -build_command_line (enum command_control_type type, char *args) -{ - struct command_line *cmd; - - if (args == NULL) - error ("if/while commands require arguments.\n"); - - cmd = (struct command_line *) xmalloc (sizeof (struct command_line)); - cmd->next = NULL; - cmd->control_type = type; - - cmd->body_count = 1; - cmd->body_list - = (struct command_line **) xmalloc (sizeof (struct command_line *) - * cmd->body_count); - memset (cmd->body_list, 0, sizeof (struct command_line *) * cmd->body_count); - cmd->line = savestring (args, strlen (args)); - return cmd; -} + /* Pass null arg rather than an empty one. */ + arg = *p ? p : 0; -/* Build and return a new command structure for the control commands - such as "if" and "while". */ + /* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy + while the is_complete_command(cfunc) test is just plain + bogus. They should both be replaced by a test of the form + c->strip_trailing_white_space_p. */ + /* NOTE: cagney/2002-02-02: The function.cfunc in the below + can't be replaced with func. This is because it is the + cfunc, and not the func, that has the value that the + is_complete_command hack is testing for. */ + /* Clear off trailing whitespace, except for set and complete + command. */ + if (arg + && c->type != set_cmd + && !is_complete_command (c)) + { + p = arg + strlen (arg) - 1; + while (p >= arg && (*p == ' ' || *p == '\t')) + p--; + *(p + 1) = '\0'; + } -static struct command_line * -get_command_line (enum command_control_type type, char *arg) -{ - struct command_line *cmd; - struct cleanup *old_chain = NULL; + /* If this command has been pre-hooked, run the hook first. */ + execute_cmd_pre_hook (c); - /* Allocate and build a new command line structure. */ - cmd = build_command_line (type, arg); + if (c->flags & DEPRECATED_WARN_USER) + deprecated_cmd_warning (&line); - old_chain = make_cleanup_free_command_lines (&cmd); + if (c->class == class_user) + execute_user_command (c, arg); + else if (c->type == set_cmd || c->type == show_cmd) + do_setshow_command (arg, from_tty & caution, c); + else if (c->func == NULL) + error ("That is not a command, just a help topic."); + else if (call_command_hook) + call_command_hook (c, arg, from_tty & caution); + else + (*c->func) (c, arg, from_tty & caution); + + /* If this command has been post-hooked, run the hook last. */ + execute_cmd_post_hook (c); - /* Read in the body of this command. */ - if (recurse_read_control_structure (cmd) == invalid_control) - { - warning ("error reading in control structure\n"); - do_cleanups (old_chain); - return NULL; } - discard_cleanups (old_chain); - return cmd; -} - -/* Recursively print a command (including full control structures). */ -#ifdef UI_OUT -void -print_command_lines (struct ui_out *uiout, struct command_line *cmd, - unsigned int depth) -{ - struct command_line *list; - - list = cmd; - while (list) + /* Tell the user if the language has changed (except first time). */ + if (current_language != expected_language) { - - if (depth) - ui_out_spaces (uiout, 2 * depth); - - /* A simple command, print it and continue. */ - if (list->control_type == simple_control) - { - ui_out_field_string (uiout, NULL, list->line); - ui_out_text (uiout, "\n"); - list = list->next; - continue; - } - - /* loop_continue to jump to the start of a while loop, print it - and continue. */ - if (list->control_type == continue_control) + if (language_mode == language_mode_auto) { - ui_out_field_string (uiout, NULL, "loop_continue"); - ui_out_text (uiout, "\n"); - list = list->next; - continue; + language_info (1); /* Print what changed. */ } + warned = 0; + } - /* loop_break to break out of a while loop, print it and continue. */ - if (list->control_type == break_control) - { - ui_out_field_string (uiout, NULL, "loop_break"); - ui_out_text (uiout, "\n"); - list = list->next; - continue; - } + /* Warn the user if the working language does not match the + language of the current frame. Only warn the user if we are + actually running the program, i.e. there is a stack. */ + /* FIXME: This should be cacheing the frame and only running when + the frame changes. */ - /* A while command. Recursively print its subcommands and continue. */ - if (list->control_type == while_control) + if (target_has_stack) + { + flang = get_frame_language (); + if (!warned + && flang != language_unknown + && flang != current_language->la_language) { - ui_out_text (uiout, "while "); - ui_out_field_fmt (uiout, NULL, "while %s", list->line); - ui_out_text (uiout, "\n"); - print_command_lines (uiout, *list->body_list, depth + 1); - ui_out_field_string (uiout, NULL, "end"); - if (depth) - ui_out_spaces (uiout, 2 * depth); - ui_out_text (uiout, "end\n"); - list = list->next; - continue; + printf_filtered ("%s\n", lang_frame_mismatch_warn); + warned = 1; } + } +} - /* An if command. Recursively print both arms before continueing. */ - if (list->control_type == if_control) - { - ui_out_text (uiout, "if "); - ui_out_field_fmt (uiout, NULL, "if %s", list->line); - ui_out_text (uiout, "\n"); - /* The true arm. */ - print_command_lines (uiout, list->body_list[0], depth + 1); - - /* Show the false arm if it exists. */ - if (list->body_count == 2) - { - if (depth) - ui_out_spaces (uiout, 2 * depth); - ui_out_field_string (uiout, NULL, "else"); - ui_out_text (uiout, "else\n"); - print_command_lines (uiout, list->body_list[1], depth + 1); - } - - ui_out_field_string (uiout, NULL, "end"); - if (depth) - ui_out_spaces (uiout, 2 * depth); - ui_out_text (uiout, "end\n"); - list = list->next; - continue; - } +/* Read commands from `instream' and execute them + until end of file or error reading instream. */ - /* ignore illegal command type and try next */ - list = list->next; - } /* while (list) */ -} -#else void -print_command_line (struct command_line *cmd, unsigned int depth, - struct ui_file *stream) +command_loop (void) { - unsigned int i; + struct cleanup *old_chain; + char *command; + int stdin_is_tty = ISATTY (stdin); + long time_at_cmd_start; +#ifdef HAVE_SBRK + long space_at_cmd_start = 0; +#endif + extern int display_time; + extern int display_space; - if (depth) + while (instream && !feof (instream)) { - for (i = 0; i < depth; i++) - fputs_filtered (" ", stream); - } + if (window_hook && instream == stdin) + (*window_hook) (instream, get_prompt ()); - /* A simple command, print it and return. */ - if (cmd->control_type == simple_control) - { - fputs_filtered (cmd->line, stream); - fputs_filtered ("\n", stream); - return; - } + quit_flag = 0; + if (instream == stdin && stdin_is_tty) + reinitialize_more_filter (); + old_chain = make_cleanup (null_cleanup, 0); - /* loop_continue to jump to the start of a while loop, print it - and return. */ - if (cmd->control_type == continue_control) - { - fputs_filtered ("loop_continue\n", stream); - return; - } + /* Get a command-line. This calls the readline package. */ + command = command_line_input (instream == stdin ? + get_prompt () : (char *) NULL, + instream == stdin, "prompt"); + if (command == 0) + return; - /* loop_break to break out of a while loop, print it and return. */ - if (cmd->control_type == break_control) - { - fputs_filtered ("loop_break\n", stream); - return; - } + time_at_cmd_start = get_run_time (); - /* A while command. Recursively print its subcommands before returning. */ - if (cmd->control_type == while_control) - { - struct command_line *list; - fputs_filtered ("while ", stream); - fputs_filtered (cmd->line, stream); - fputs_filtered ("\n", stream); - list = *cmd->body_list; - while (list) + if (display_space) { - print_command_line (list, depth + 1, stream); - list = list->next; +#ifdef HAVE_SBRK + extern char **environ; + char *lim = (char *) sbrk (0); + + space_at_cmd_start = (long) (lim - (char *) &environ); +#endif } - } - /* An if command. Recursively print both arms before returning. */ - if (cmd->control_type == if_control) - { - fputs_filtered ("if ", stream); - fputs_filtered (cmd->line, stream); - fputs_filtered ("\n", stream); - /* The true arm. */ - print_command_line (cmd->body_list[0], depth + 1, stream); - - /* Show the false arm if it exists. */ - if (cmd->body_count == 2) + execute_command (command, instream == stdin); + /* Do any commands attached to breakpoint we stopped at. */ + bpstat_do_actions (&stop_bpstat); + do_cleanups (old_chain); + + if (display_time) { - if (depth) - { - for (i = 0; i < depth; i++) - fputs_filtered (" ", stream); - } - fputs_filtered ("else\n", stream); - print_command_line (cmd->body_list[1], depth + 1, stream); + long cmd_time = get_run_time () - time_at_cmd_start; + + printf_unfiltered ("Command execution time: %ld.%06ld\n", + cmd_time / 1000000, cmd_time % 1000000); } - if (depth) + + if (display_space) { - for (i = 0; i < depth; i++) - fputs_filtered (" ", stream); +#ifdef HAVE_SBRK + extern char **environ; + char *lim = (char *) sbrk (0); + long space_now = lim - (char *) &environ; + long space_diff = space_now - space_at_cmd_start; + + printf_unfiltered ("Space used: %ld (%c%ld for this command)\n", + space_now, + (space_diff >= 0 ? '+' : '-'), + space_diff); +#endif } - fputs_filtered ("end\n", stream); } } -#endif - -/* Execute the command in CMD. */ -enum command_control_type -execute_control_command (struct command_line *cmd) +/* Read commands from `instream' and execute them until end of file or + error reading instream. This command loop doesnt care about any + such things as displaying time and space usage. If the user asks + for those, they won't work. */ +void +simplified_command_loop (char *(*read_input_func) (char *), + void (*execute_command_func) (char *, int)) { - struct expression *expr; - struct command_line *current; - struct cleanup *old_chain = 0; - value_ptr val; - value_ptr val_mark; - int loop; - enum command_control_type ret; - char *new_line; - - switch (cmd->control_type) - { - case simple_control: - /* A simple command, execute it and return. */ - new_line = insert_args (cmd->line); - if (!new_line) - return invalid_control; - old_chain = make_cleanup (free_current_contents, &new_line); - execute_command (new_line, 0); - ret = cmd->control_type; - break; - - case continue_control: - case break_control: - /* Return for "continue", and "break" so we can either - continue the loop at the top, or break out. */ - ret = cmd->control_type; - break; - - case while_control: - { - /* Parse the loop control expression for the while statement. */ - new_line = insert_args (cmd->line); - if (!new_line) - return invalid_control; - old_chain = make_cleanup (free_current_contents, &new_line); - expr = parse_expression (new_line); - make_cleanup (free_current_contents, &expr); - - ret = simple_control; - loop = 1; - - /* Keep iterating so long as the expression is true. */ - while (loop == 1) - { - int cond_result; - - QUIT; - - /* Evaluate the expression. */ - val_mark = value_mark (); - val = evaluate_expression (expr); - cond_result = value_true (val); - value_free_to_mark (val_mark); - - /* If the value is false, then break out of the loop. */ - if (!cond_result) - break; - - /* Execute the body of the while statement. */ - current = *cmd->body_list; - while (current) - { - ret = execute_control_command (current); - - /* If we got an error, or a "break" command, then stop - looping. */ - if (ret == invalid_control || ret == break_control) - { - loop = 0; - break; - } - - /* If we got a "continue" command, then restart the loop - at this point. */ - if (ret == continue_control) - break; + struct cleanup *old_chain; + char *command; + int stdin_is_tty = ISATTY (stdin); - /* Get the next statement. */ - current = current->next; - } - } + while (instream && !feof (instream)) + { + quit_flag = 0; + if (instream == stdin && stdin_is_tty) + reinitialize_more_filter (); + old_chain = make_cleanup (null_cleanup, 0); - /* Reset RET so that we don't recurse the break all the way down. */ - if (ret == break_control) - ret = simple_control; + /* Get a command-line. */ + command = (*read_input_func) (instream == stdin ? + get_prompt () : (char *) NULL); - break; - } + if (command == 0) + return; - case if_control: - { - new_line = insert_args (cmd->line); - if (!new_line) - return invalid_control; - old_chain = make_cleanup (free_current_contents, &new_line); - /* Parse the conditional for the if statement. */ - expr = parse_expression (new_line); - make_cleanup (free_current_contents, &expr); - - current = NULL; - ret = simple_control; - - /* Evaluate the conditional. */ - val_mark = value_mark (); - val = evaluate_expression (expr); - - /* Choose which arm to take commands from based on the value of the - conditional expression. */ - if (value_true (val)) - current = *cmd->body_list; - else if (cmd->body_count == 2) - current = *(cmd->body_list + 1); - value_free_to_mark (val_mark); - - /* Execute commands in the given arm. */ - while (current) - { - ret = execute_control_command (current); - - /* If we got an error, get out. */ - if (ret != simple_control) - break; - - /* Get the next statement in the body. */ - current = current->next; - } + (*execute_command_func) (command, instream == stdin); - break; - } + /* Do any commands attached to breakpoint we stopped at. */ + bpstat_do_actions (&stop_bpstat); - default: - warning ("Invalid control type in command structure."); - return invalid_control; + do_cleanups (old_chain); } - - if (old_chain) - do_cleanups (old_chain); - - return ret; -} - -/* "while" command support. Executes a body of statements while the - loop condition is nonzero. */ - -static void -while_command (char *arg, int from_tty) -{ - struct command_line *command = NULL; - - control_level = 1; - command = get_command_line (while_control, arg); - - if (command == NULL) - return; - - execute_control_command (command); - free_command_lines (&command); } + +/* Commands call this if they do not want to be repeated by null lines. */ -/* "if" command support. Execute either the true or false arm depending - on the value of the if conditional. */ - -static void -if_command (char *arg, int from_tty) +void +dont_repeat (void) { - struct command_line *command = NULL; - - control_level = 1; - command = get_command_line (if_control, arg); - - if (command == NULL) + if (server_command) return; - execute_control_command (command); - free_command_lines (&command); -} - -/* Cleanup */ -static void -arg_cleanup (void *ignore) -{ - struct user_args *oargs = user_args; - if (!user_args) - internal_error ("Internal error, arg_cleanup called with no user args.\n"); - - user_args = user_args->next; - free (oargs); + /* If we aren't reading from standard input, we are saving the last + thing read from stdin in line and don't want to delete it. Null lines + won't repeat here in any case. */ + if (instream == stdin) + *line = 0; } + +/* Read a line from the stream "instream" without command line editing. -/* Bind the incomming arguments for a user defined command to - $arg0, $arg1 ... $argMAXUSERARGS. */ + It prints PROMPT_ARG once at the start. + Action is compatible with "readline", e.g. space for the result is + malloc'd and should be freed by the caller. -static struct cleanup * -setup_user_args (char *p) + A NULL return means end of file. */ +char * +gdb_readline (char *prompt_arg) { - struct user_args *args; - struct cleanup *old_chain; - unsigned int arg_count = 0; - - args = (struct user_args *) xmalloc (sizeof (struct user_args)); - memset (args, 0, sizeof (struct user_args)); - - args->next = user_args; - user_args = args; + int c; + char *result; + int input_index = 0; + int result_size = 80; - old_chain = make_cleanup (arg_cleanup, 0/*ignored*/); + if (prompt_arg) + { + /* Don't use a _filtered function here. It causes the assumed + character position to be off, since the newline we read from + the user is not accounted for. */ + fputs_unfiltered (prompt_arg, gdb_stdout); + gdb_flush (gdb_stdout); + } - if (p == NULL) - return old_chain; + result = (char *) xmalloc (result_size); - while (*p) + while (1) { - char *start_arg; - int squote = 0; - int dquote = 0; - int bsquote = 0; + /* Read from stdin if we are executing a user defined command. + This is the right thing for prompt_for_continue, at least. */ + c = fgetc (instream ? instream : stdin); - if (arg_count >= MAXUSERARGS) + if (c == EOF) { - error ("user defined function may only have %d arguments.\n", - MAXUSERARGS); - return old_chain; + if (input_index > 0) + /* The last line does not end with a newline. Return it, and + if we are called again fgetc will still return EOF and + we'll return NULL then. */ + break; + xfree (result); + return NULL; } - /* Strip whitespace. */ - while (*p == ' ' || *p == '\t') - p++; - - /* P now points to an argument. */ - start_arg = p; - user_args->a[arg_count].arg = p; - - /* Get to the end of this argument. */ - while (*p) + if (c == '\n') +#ifndef CRLF_SOURCE_FILES + break; +#else { - if (((*p == ' ' || *p == '\t')) && !squote && !dquote && !bsquote) - break; - else - { - if (bsquote) - bsquote = 0; - else if (*p == '\\') - bsquote = 1; - else if (squote) - { - if (*p == '\'') - squote = 0; - } - else if (dquote) - { - if (*p == '"') - dquote = 0; - } - else - { - if (*p == '\'') - squote = 1; - else if (*p == '"') - dquote = 1; - } - p++; - } + if (input_index > 0 && result[input_index - 1] == '\r') + input_index--; + break; } +#endif - user_args->a[arg_count].len = p - start_arg; - arg_count++; - user_args->count++; + result[input_index++] = c; + while (input_index >= result_size) + { + result_size *= 2; + result = (char *) xrealloc (result, result_size); + } } - return old_chain; -} - -/* Given character string P, return a point to the first argument ($arg), - or NULL if P contains no arguments. */ -static char * -locate_arg (char *p) -{ - while ((p = strchr (p, '$'))) - { - if (strncmp (p, "$arg", 4) == 0 && isdigit (p[4])) - return p; - p++; - } - return NULL; + result[input_index++] = '\0'; + return result; } -/* Insert the user defined arguments stored in user_arg into the $arg - arguments found in line, with the updated copy being placed into nline. */ - -static char * -insert_args (char *line) -{ - char *p, *save_line, *new_line; - unsigned len, i; - - /* First we need to know how much memory to allocate for the new line. */ - save_line = line; - len = 0; - while ((p = locate_arg (line))) - { - len += p - line; - i = p[4] - '0'; - - if (i >= user_args->count) - { - error ("Missing argument %d in user function.\n", i); - return NULL; - } - len += user_args->a[i].len; - line = p + 5; - } - - /* Don't forget the tail. */ - len += strlen (line); - - /* Allocate space for the new line and fill it in. */ - new_line = (char *) xmalloc (len + 1); - if (new_line == NULL) - return NULL; - - /* Restore pointer to beginning of old line. */ - line = save_line; - - /* Save pointer to beginning of new line. */ - save_line = new_line; - - while ((p = locate_arg (line))) - { - int i, len; - - memcpy (new_line, line, p - line); - new_line += p - line; - i = p[4] - '0'; - - len = user_args->a[i].len; - if (len) - { - memcpy (new_line, user_args->a[i].arg, len); - new_line += len; - } - line = p + 5; - } - /* Don't forget the tail. */ - strcpy (new_line, line); - - /* Return a pointer to the beginning of the new line. */ - return save_line; -} - -void -execute_user_command (struct cmd_list_element *c, char *args) -{ - register struct command_line *cmdlines; - struct cleanup *old_chain; - enum command_control_type ret; - - old_chain = setup_user_args (args); - - cmdlines = c->user_commands; - if (cmdlines == 0) - /* Null command */ - return; - - /* Set the instream to 0, indicating execution of a - user-defined function. */ - old_chain = make_cleanup (do_restore_instream_cleanup, instream); - instream = (FILE *) 0; - while (cmdlines) - { - ret = execute_control_command (cmdlines); - if (ret != simple_control && ret != break_control) - { - warning ("Error in control structure.\n"); - break; - } - cmdlines = cmdlines->next; - } - do_cleanups (old_chain); -} - -/* Execute the line P as a command. - Pass FROM_TTY as second argument to the defining function. */ - -void -execute_command (char *p, int from_tty) -{ - register struct cmd_list_element *c; - register enum language flang; - static int warned = 0; - char *line; - /* FIXME: These should really be in an appropriate header file */ -extern void serial_log_command (const char *); - - free_all_values (); - - /* Force cleanup of any alloca areas if using C alloca instead of - a builtin alloca. */ - alloca (0); - - /* This can happen when command_line_input hits end of file. */ - if (p == NULL) - return; - - serial_log_command (p); - - while (*p == ' ' || *p == '\t') - p++; - if (*p) - { - char *arg; - line = p; - - c = lookup_cmd (&p, cmdlist, "", 0, 1); - - /* If the target is running, we allow only a limited set of - commands. */ - if (event_loop_p && target_can_async_p () && target_executing) - if (!strcmp (c->name, "help") - && !strcmp (c->name, "pwd") - && !strcmp (c->name, "show") - && !strcmp (c->name, "stop")) - error ("Cannot execute this command while the target is running."); - - /* Pass null arg rather than an empty one. */ - arg = *p ? p : 0; - - /* Clear off trailing whitespace, except for set and complete command. */ - if (arg && c->type != set_cmd && c->function.cfunc != complete_command) - { - p = arg + strlen (arg) - 1; - while (p >= arg && (*p == ' ' || *p == '\t')) - p--; - *(p + 1) = '\0'; - } - - /* If this command has been pre-hooked, run the hook first. */ - if ((c->hook_pre) && (!c->hook_in)) - { - c->hook_in = 1; /* Prevent recursive hooking */ - execute_user_command (c->hook_pre, (char *) 0); - c->hook_in = 0; /* Allow hook to work again once it is complete */ - } - - if (c->flags & DEPRECATED_WARN_USER) - deprecated_cmd_warning (&line); - - if (c->class == class_user) - execute_user_command (c, arg); - else if (c->type == set_cmd || c->type == show_cmd) - do_setshow_command (arg, from_tty & caution, c); - else if (c->function.cfunc == NO_FUNCTION) - error ("That is not a command, just a help topic."); - else if (call_command_hook) - call_command_hook (c, arg, from_tty & caution); - else - (*c->function.cfunc) (arg, from_tty & caution); - - /* If this command has been post-hooked, run the hook last. */ - if ((c->hook_post) && (!c->hook_in)) - { - c->hook_in = 1; /* Prevent recursive hooking */ - execute_user_command (c->hook_post, (char *) 0); - c->hook_in = 0; /* allow hook to work again once it is complete */ - } - - } - - /* Tell the user if the language has changed (except first time). */ - if (current_language != expected_language) - { - if (language_mode == language_mode_auto) - { - language_info (1); /* Print what changed. */ - } - warned = 0; - } - - /* Warn the user if the working language does not match the - language of the current frame. Only warn the user if we are - actually running the program, i.e. there is a stack. */ - /* FIXME: This should be cacheing the frame and only running when - the frame changes. */ - - if (target_has_stack) - { - flang = get_frame_language (); - if (!warned - && flang != language_unknown - && flang != current_language->la_language) - { - printf_filtered ("%s\n", lang_frame_mismatch_warn); - warned = 1; - } - } -} - -/* Read commands from `instream' and execute them - until end of file or error reading instream. */ - -void -command_loop (void) -{ - struct cleanup *old_chain; - char *command; - int stdin_is_tty = ISATTY (stdin); - long time_at_cmd_start; -#ifdef HAVE_SBRK - long space_at_cmd_start = 0; -#endif - extern int display_time; - extern int display_space; - - while (instream && !feof (instream)) - { -#if defined(TUI) - extern int insert_mode; -#endif - if (window_hook && instream == stdin) - (*window_hook) (instream, get_prompt ()); - - quit_flag = 0; - if (instream == stdin && stdin_is_tty) - reinitialize_more_filter (); - old_chain = make_cleanup (null_cleanup, 0); - -#if defined(TUI) - /* A bit of paranoia: I want to make sure the "insert_mode" global - * is clear except when it is being used for command-line editing - * (see tuiIO.c, utils.c); otherwise normal output will - * get messed up in the TUI. So clear it before/after - * the command-line-input call. - RT - */ - insert_mode = 0; -#endif - /* Get a command-line. This calls the readline package. */ - command = command_line_input (instream == stdin ? - get_prompt () : (char *) NULL, - instream == stdin, "prompt"); -#if defined(TUI) - insert_mode = 0; -#endif - if (command == 0) - return; - - time_at_cmd_start = get_run_time (); - - if (display_space) - { -#ifdef HAVE_SBRK - extern char **environ; - char *lim = (char *) sbrk (0); - - space_at_cmd_start = (long) (lim - (char *) &environ); -#endif - } - - execute_command (command, instream == stdin); - /* Do any commands attached to breakpoint we stopped at. */ - bpstat_do_actions (&stop_bpstat); - do_cleanups (old_chain); - - if (display_time) - { - long cmd_time = get_run_time () - time_at_cmd_start; - - printf_unfiltered ("Command execution time: %ld.%06ld\n", - cmd_time / 1000000, cmd_time % 1000000); - } - - if (display_space) - { -#ifdef HAVE_SBRK - extern char **environ; - char *lim = (char *) sbrk (0); - long space_now = lim - (char *) &environ; - long space_diff = space_now - space_at_cmd_start; - - printf_unfiltered ("Space used: %ld (%c%ld for this command)\n", - space_now, - (space_diff >= 0 ? '+' : '-'), - space_diff); -#endif - } - } -} - -/* Read commands from `instream' and execute them until end of file or - error reading instream. This command loop doesnt care about any - such things as displaying time and space usage. If the user asks - for those, they won't work. */ -void -simplified_command_loop (char *(*read_input_func) (char *), - void (*execute_command_func) (char *, int)) -{ - struct cleanup *old_chain; - char *command; - int stdin_is_tty = ISATTY (stdin); - - while (instream && !feof (instream)) - { - quit_flag = 0; - if (instream == stdin && stdin_is_tty) - reinitialize_more_filter (); - old_chain = make_cleanup (null_cleanup, 0); - - /* Get a command-line. */ - command = (*read_input_func) (instream == stdin ? - get_prompt () : (char *) NULL); - - if (command == 0) - return; - - (*execute_command_func) (command, instream == stdin); - - /* Do any commands attached to breakpoint we stopped at. */ - bpstat_do_actions (&stop_bpstat); - - do_cleanups (old_chain); - } -} - -/* Commands call this if they do not want to be repeated by null lines. */ - -void -dont_repeat (void) -{ - if (server_command) - return; - - /* If we aren't reading from standard input, we are saving the last - thing read from stdin in line and don't want to delete it. Null lines - won't repeat here in any case. */ - if (instream == stdin) - *line = 0; -} - -/* Read a line from the stream "instream" without command line editing. - - It prints PROMPT_ARG once at the start. - Action is compatible with "readline", e.g. space for the result is - malloc'd and should be freed by the caller. - - A NULL return means end of file. */ -char * -gdb_readline (char *prompt_arg) -{ - int c; - char *result; - int input_index = 0; - int result_size = 80; - - if (prompt_arg) - { - /* Don't use a _filtered function here. It causes the assumed - character position to be off, since the newline we read from - the user is not accounted for. */ - fputs_unfiltered (prompt_arg, gdb_stdout); -#ifdef MPW - /* Move to a new line so the entered line doesn't have a prompt - on the front of it. */ - fputs_unfiltered ("\n", gdb_stdout); -#endif /* MPW */ - gdb_flush (gdb_stdout); - } - - result = (char *) xmalloc (result_size); - - while (1) - { - /* Read from stdin if we are executing a user defined command. - This is the right thing for prompt_for_continue, at least. */ - c = fgetc (instream ? instream : stdin); - - if (c == EOF) - { - if (input_index > 0) - /* The last line does not end with a newline. Return it, and - if we are called again fgetc will still return EOF and - we'll return NULL then. */ - break; - free (result); - return NULL; - } - - if (c == '\n') -#ifndef CRLF_SOURCE_FILES - break; -#else - { - if (input_index > 0 && result[input_index - 1] == '\r') - input_index--; - break; - } -#endif - - result[input_index++] = c; - while (input_index >= result_size) - { - result_size *= 2; - result = (char *) xrealloc (result, result_size); - } - } - - result[input_index++] = '\0'; - return result; -} - -/* Variables which control command line editing and history - substitution. These variables are given default values at the end - of this file. */ -static int command_editing_p; -/* NOTE 1999-04-29: This variable will be static again, once we modify - gdb to use the event loop as the default command loop and we merge - event-top.c into this file, top.c */ -/* static */ int history_expansion_p; -static int write_history_p; -static int history_size; -static char *history_filename; - -/* readline uses the word breaks for two things: - (1) In figuring out where to point the TEXT parameter to the - rl_completion_entry_function. Since we don't use TEXT for much, - it doesn't matter a lot what the word breaks are for this purpose, but - it does affect how much stuff M-? lists. - (2) If one of the matches contains a word break character, readline - will quote it. That's why we switch between - gdb_completer_word_break_characters and - gdb_completer_command_word_break_characters. I'm not sure when - we need this behavior (perhaps for funky characters in C++ symbols?). */ - -/* Variables which are necessary for fancy command line editing. */ -char *gdb_completer_word_break_characters = -" \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-"; - -/* When completing on command names, we remove '-' from the list of - word break characters, since we use it in command names. If the - readline library sees one in any of the current completion strings, - it thinks that the string needs to be quoted and automatically supplies - a leading quote. */ -char *gdb_completer_command_word_break_characters = -" \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,"; - -/* When completing on file names, we remove from the list of word - break characters any characters that are commonly used in file - names, such as '-', '+', '~', etc. Otherwise, readline displays - incorrect completion candidates. */ -char *gdb_completer_file_name_break_characters = " \t\n*|\"';:?/><"; - -/* Characters that can be used to quote completion strings. Note that we - can't include '"' because the gdb C parser treats such quoted sequences - as strings. */ -char *gdb_completer_quote_characters = -"'"; - -/* Functions that are used as part of the fancy command line editing. */ - -/* This can be used for functions which don't want to complete on symbols - but don't want to complete on anything else either. */ -/* ARGSUSED */ -char ** -noop_completer (char *text, char *prefix) -{ - return NULL; -} - -/* Complete on filenames. */ -char ** -filename_completer (char *text, char *word) -{ - /* From readline. */ -extern char *filename_completion_function (char *, int); - int subsequent_name; - char **return_val; - int return_val_used; - int return_val_alloced; - - return_val_used = 0; - /* Small for testing. */ - return_val_alloced = 1; - return_val = (char **) xmalloc (return_val_alloced * sizeof (char *)); - - subsequent_name = 0; - while (1) - { - char *p; - p = filename_completion_function (text, subsequent_name); - if (return_val_used >= return_val_alloced) - { - return_val_alloced *= 2; - return_val = - (char **) xrealloc (return_val, - return_val_alloced * sizeof (char *)); - } - if (p == NULL) - { - return_val[return_val_used++] = p; - break; - } - /* We need to set subsequent_name to a non-zero value before the - continue line below, because otherwise, if the first file seen - by GDB is a backup file whose name ends in a `~', we will loop - indefinitely. */ - subsequent_name = 1; - /* Like emacs, don't complete on old versions. Especially useful - in the "source" command. */ - if (p[strlen (p) - 1] == '~') - continue; - - { - char *q; - if (word == text) - /* Return exactly p. */ - return_val[return_val_used++] = p; - else if (word > text) - { - /* Return some portion of p. */ - q = xmalloc (strlen (p) + 5); - strcpy (q, p + (word - text)); - return_val[return_val_used++] = q; - free (p); - } - else - { - /* Return some of TEXT plus p. */ - q = xmalloc (strlen (p) + (text - word) + 5); - strncpy (q, word, text - word); - q[text - word] = '\0'; - strcat (q, p); - return_val[return_val_used++] = q; - free (p); - } - } - } -#if 0 - /* There is no way to do this just long enough to affect quote inserting - without also affecting the next completion. This should be fixed in - readline. FIXME. */ - /* Insure that readline does the right thing - with respect to inserting quotes. */ - rl_completer_word_break_characters = ""; -#endif - return return_val; -} - -/* Here are some useful test cases for completion. FIXME: These should - be put in the test suite. They should be tested with both M-? and TAB. - - "show output-" "radix" - "show output" "-radix" - "p" ambiguous (commands starting with p--path, print, printf, etc.) - "p " ambiguous (all symbols) - "info t foo" no completions - "info t " no completions - "info t" ambiguous ("info target", "info terminal", etc.) - "info ajksdlfk" no completions - "info ajksdlfk " no completions - "info" " " - "info " ambiguous (all info commands) - "p \"a" no completions (string constant) - "p 'a" ambiguous (all symbols starting with a) - "p b-a" ambiguous (all symbols starting with a) - "p b-" ambiguous (all symbols) - "file Make" "file" (word break hard to screw up here) - "file ../gdb.stabs/we" "ird" (needs to not break word at slash) - */ - -/* Generate completions one by one for the completer. Each time we are - called return another potential completion to the caller. - line_completion just completes on commands or passes the buck to the - command's completer function, the stuff specific to symbol completion - is in make_symbol_completion_list. - - TEXT is the caller's idea of the "word" we are looking at. - - MATCHES is the number of matches that have currently been collected from - calling this completion function. When zero, then we need to initialize, - otherwise the initialization has already taken place and we can just - return the next potential completion string. - - LINE_BUFFER is available to be looked at; it contains the entire text - of the line. POINT is the offset in that line of the cursor. You - should pretend that the line ends at POINT. - - Returns NULL if there are no more completions, else a pointer to a string - which is a possible completion, it is the caller's responsibility to - free the string. */ - -static char * -line_completion_function (char *text, int matches, char *line_buffer, int point) -{ - static char **list = (char **) NULL; /* Cache of completions */ - static int index; /* Next cached completion */ - char *output = NULL; - char *tmp_command, *p; - /* Pointer within tmp_command which corresponds to text. */ - char *word; - struct cmd_list_element *c, *result_list; - - if (matches == 0) - { - /* The caller is beginning to accumulate a new set of completions, so - we need to find all of them now, and cache them for returning one at - a time on future calls. */ - - if (list) - { - /* Free the storage used by LIST, but not by the strings inside. - This is because rl_complete_internal () frees the strings. */ - free ((PTR) list); - } - list = 0; - index = 0; - - /* Choose the default set of word break characters to break completions. - If we later find out that we are doing completions on command strings - (as opposed to strings supplied by the individual command completer - functions, which can be any string) then we will switch to the - special word break set for command strings, which leaves out the - '-' character used in some commands. */ - - rl_completer_word_break_characters = - gdb_completer_word_break_characters; - - /* Decide whether to complete on a list of gdb commands or on symbols. */ - tmp_command = (char *) alloca (point + 1); - p = tmp_command; - - strncpy (tmp_command, line_buffer, point); - tmp_command[point] = '\0'; - /* Since text always contains some number of characters leading up - to point, we can find the equivalent position in tmp_command - by subtracting that many characters from the end of tmp_command. */ - word = tmp_command + point - strlen (text); - - if (point == 0) - { - /* An empty line we want to consider ambiguous; that is, it - could be any command. */ - c = (struct cmd_list_element *) -1; - result_list = 0; - } - else - { - c = lookup_cmd_1 (&p, cmdlist, &result_list, 1); - } - - /* Move p up to the next interesting thing. */ - while (*p == ' ' || *p == '\t') - { - p++; - } - - if (!c) - { - /* It is an unrecognized command. So there are no - possible completions. */ - list = NULL; - } - else if (c == (struct cmd_list_element *) -1) - { - char *q; - - /* lookup_cmd_1 advances p up to the first ambiguous thing, but - doesn't advance over that thing itself. Do so now. */ - q = p; - while (*q && (isalnum (*q) || *q == '-' || *q == '_')) - ++q; - if (q != tmp_command + point) - { - /* There is something beyond the ambiguous - command, so there are no possible completions. For - example, "info t " or "info t foo" does not complete - to anything, because "info t" can be "info target" or - "info terminal". */ - list = NULL; - } - else - { - /* We're trying to complete on the command which was ambiguous. - This we can deal with. */ - if (result_list) - { - list = complete_on_cmdlist (*result_list->prefixlist, p, - word); - } - else - { - list = complete_on_cmdlist (cmdlist, p, word); - } - /* Insure that readline does the right thing with respect to - inserting quotes. */ - rl_completer_word_break_characters = - gdb_completer_command_word_break_characters; - } - } - else - { - /* We've recognized a full command. */ - - if (p == tmp_command + point) - { - /* There is no non-whitespace in the line beyond the command. */ - - if (p[-1] == ' ' || p[-1] == '\t') - { - /* The command is followed by whitespace; we need to complete - on whatever comes after command. */ - if (c->prefixlist) - { - /* It is a prefix command; what comes after it is - a subcommand (e.g. "info "). */ - list = complete_on_cmdlist (*c->prefixlist, p, word); - - /* Insure that readline does the right thing - with respect to inserting quotes. */ - rl_completer_word_break_characters = - gdb_completer_command_word_break_characters; - } - else if (c->enums) - { - list = complete_on_enum (c->enums, p, word); - rl_completer_word_break_characters = - gdb_completer_command_word_break_characters; - } - else - { - /* It is a normal command; what comes after it is - completed by the command's completer function. */ - list = (*c->completer) (p, word); - if (c->completer == filename_completer) - rl_completer_word_break_characters = - gdb_completer_file_name_break_characters; - } - } - else - { - /* The command is not followed by whitespace; we need to - complete on the command itself. e.g. "p" which is a - command itself but also can complete to "print", "ptype" - etc. */ - char *q; - - /* Find the command we are completing on. */ - q = p; - while (q > tmp_command) - { - if (isalnum (q[-1]) || q[-1] == '-' || q[-1] == '_') - --q; - else - break; - } - - list = complete_on_cmdlist (result_list, q, word); - - /* Insure that readline does the right thing - with respect to inserting quotes. */ - rl_completer_word_break_characters = - gdb_completer_command_word_break_characters; - } - } - else - { - /* There is non-whitespace beyond the command. */ - - if (c->prefixlist && !c->allow_unknown) - { - /* It is an unrecognized subcommand of a prefix command, - e.g. "info adsfkdj". */ - list = NULL; - } - else if (c->enums) - { - list = complete_on_enum (c->enums, p, word); - } - else - { - /* It is a normal command. */ - list = (*c->completer) (p, word); - if (c->completer == filename_completer) - rl_completer_word_break_characters = - gdb_completer_file_name_break_characters; - } - } - } - } - - /* If we found a list of potential completions during initialization then - dole them out one at a time. The vector of completions is NULL - terminated, so after returning the last one, return NULL (and continue - to do so) each time we are called after that, until a new list is - available. */ - - if (list) - { - output = list[index]; - if (output) - { - index++; - } - } - -#if 0 - /* Can't do this because readline hasn't yet checked the word breaks - for figuring out whether to insert a quote. */ - if (output == NULL) - /* Make sure the word break characters are set back to normal for the - next time that readline tries to complete something. */ - rl_completer_word_break_characters = - gdb_completer_word_break_characters; -#endif - - return (output); -} - -/* Line completion interface function for readline. */ - -static char * -readline_line_completion_function (char *text, int matches) -{ - return line_completion_function (text, matches, rl_line_buffer, rl_point); -} - -/* Skip over a possibly quoted word (as defined by the quote characters - and word break characters the completer uses). Returns pointer to the - location after the "word". */ - -char * -skip_quoted (char *str) -{ - char quote_char = '\0'; - char *scan; - - for (scan = str; *scan != '\0'; scan++) - { - if (quote_char != '\0') - { - /* Ignore everything until the matching close quote char */ - if (*scan == quote_char) - { - /* Found matching close quote. */ - scan++; - break; - } - } - else if (strchr (gdb_completer_quote_characters, *scan)) - { - /* Found start of a quoted string. */ - quote_char = *scan; - } - else if (strchr (gdb_completer_word_break_characters, *scan)) - { - break; - } - } - return (scan); -} - - -#ifdef STOP_SIGNAL -static void -stop_sig (int signo) -{ -#if STOP_SIGNAL == SIGTSTP - signal (SIGTSTP, SIG_DFL); - sigsetmask (0); - kill (getpid (), SIGTSTP); - signal (SIGTSTP, stop_sig); -#else - signal (STOP_SIGNAL, stop_sig); -#endif - printf_unfiltered ("%s", get_prompt ()); - gdb_flush (gdb_stdout); - - /* Forget about any previous command -- null line now will do nothing. */ - dont_repeat (); -} -#endif /* STOP_SIGNAL */ - -/* Initialize signal handlers. */ -static void -do_nothing (int signo) -{ - /* Under System V the default disposition of a signal is reinstated after - the signal is caught and delivered to an application process. On such - systems one must restore the replacement signal handler if one wishes - to continue handling the signal in one's program. On BSD systems this - is not needed but it is harmless, and it simplifies the code to just do - it unconditionally. */ - signal (signo, do_nothing); -} - -static void -init_signals (void) -{ - signal (SIGINT, request_quit); - - /* If SIGTRAP was set to SIG_IGN, then the SIG_IGN will get passed - to the inferior and breakpoints will be ignored. */ -#ifdef SIGTRAP - signal (SIGTRAP, SIG_DFL); -#endif - - /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get - passed to the inferior, which we don't want. It would be - possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but - on BSD4.3 systems using vfork, that can affect the - GDB process as well as the inferior (the signal handling tables - might be in memory, shared between the two). Since we establish - a handler for SIGQUIT, when we call exec it will set the signal - to SIG_DFL for us. */ - signal (SIGQUIT, do_nothing); -#ifdef SIGHUP - if (signal (SIGHUP, do_nothing) != SIG_IGN) - signal (SIGHUP, disconnect); -#endif - signal (SIGFPE, float_handler); - -#if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) - signal (SIGWINCH, SIGWINCH_HANDLER); -#endif -} - -/* Read one line from the command input stream `instream' - into the local static buffer `linebuffer' (whose current length - is `linelength'). - The buffer is made bigger as necessary. - Returns the address of the start of the line. - - NULL is returned for end of file. - - *If* the instream == stdin & stdin is a terminal, the line read - is copied into the file line saver (global var char *line, - length linesize) so that it can be duplicated. - - This routine either uses fancy command line editing or - simple input as the user has requested. */ - -char * -command_line_input (char *prompt_arg, int repeat, char *annotation_suffix) -{ - static char *linebuffer = 0; - static unsigned linelength = 0; - register char *p; - char *p1; - char *rl; - char *local_prompt = prompt_arg; - char *nline; - char got_eof = 0; - - /* The annotation suffix must be non-NULL. */ - if (annotation_suffix == NULL) - annotation_suffix = ""; - - if (annotation_level > 1 && instream == stdin) - { - local_prompt = alloca ((prompt_arg == NULL ? 0 : strlen (prompt_arg)) - + strlen (annotation_suffix) + 40); - if (prompt_arg == NULL) - local_prompt[0] = '\0'; - else - strcpy (local_prompt, prompt_arg); - strcat (local_prompt, "\n\032\032"); - strcat (local_prompt, annotation_suffix); - strcat (local_prompt, "\n"); - } - - if (linebuffer == 0) - { - linelength = 80; - linebuffer = (char *) xmalloc (linelength); - } - - p = linebuffer; - - /* Control-C quits instantly if typed while in this loop - since it should not wait until the user types a newline. */ - immediate_quit++; -#ifdef STOP_SIGNAL - if (job_control) - { - if (event_loop_p) - signal (STOP_SIGNAL, handle_stop_sig); - else - signal (STOP_SIGNAL, stop_sig); - } -#endif - - while (1) - { - /* Make sure that all output has been output. Some machines may let - you get away with leaving out some of the gdb_flush, but not all. */ - wrap_here (""); - gdb_flush (gdb_stdout); - gdb_flush (gdb_stderr); - - if (source_file_name != NULL) - { - ++source_line_number; - sprintf (source_error, - "%s%s:%d: Error in sourced command file:\n", - source_pre_error, - source_file_name, - source_line_number); - error_pre_print = source_error; - } - - if (annotation_level > 1 && instream == stdin) - { - printf_unfiltered ("\n\032\032pre-"); - printf_unfiltered (annotation_suffix); - printf_unfiltered ("\n"); - } - - /* Don't use fancy stuff if not talking to stdin. */ - if (readline_hook && instream == NULL) - { - rl = (*readline_hook) (local_prompt); - } - else if (command_editing_p && instream == stdin && ISATTY (instream)) - { - rl = readline (local_prompt); - } - else - { - rl = gdb_readline (local_prompt); - } - - if (annotation_level > 1 && instream == stdin) - { - printf_unfiltered ("\n\032\032post-"); - printf_unfiltered (annotation_suffix); - printf_unfiltered ("\n"); - } - - if (!rl || rl == (char *) EOF) - { - got_eof = 1; - break; - } - if (strlen (rl) + 1 + (p - linebuffer) > linelength) - { - linelength = strlen (rl) + 1 + (p - linebuffer); - nline = (char *) xrealloc (linebuffer, linelength); - p += nline - linebuffer; - linebuffer = nline; - } - p1 = rl; - /* Copy line. Don't copy null at end. (Leaves line alone - if this was just a newline) */ - while (*p1) - *p++ = *p1++; - - free (rl); /* Allocated in readline. */ - - if (p == linebuffer || *(p - 1) != '\\') - break; - - p--; /* Put on top of '\'. */ - local_prompt = (char *) 0; - } +/* Variables which control command line editing and history + substitution. These variables are given default values at the end + of this file. */ +static int command_editing_p; +/* NOTE 1999-04-29: This variable will be static again, once we modify + gdb to use the event loop as the default command loop and we merge + event-top.c into this file, top.c */ +/* static */ int history_expansion_p; +static int write_history_p; +static int history_size; +static char *history_filename; + #ifdef STOP_SIGNAL - if (job_control) - signal (STOP_SIGNAL, SIG_DFL); -#endif - immediate_quit--; - - if (got_eof) - return NULL; - -#define SERVER_COMMAND_LENGTH 7 - server_command = - (p - linebuffer > SERVER_COMMAND_LENGTH) - && STREQN (linebuffer, "server ", SERVER_COMMAND_LENGTH); - if (server_command) - { - /* Note that we don't set `line'. Between this and the check in - dont_repeat, this insures that repeating will still do the - right thing. */ - *p = '\0'; - return linebuffer + SERVER_COMMAND_LENGTH; - } - - /* Do history expansion if that is wished. */ - if (history_expansion_p && instream == stdin - && ISATTY (instream)) - { - char *history_value; - int expanded; - - *p = '\0'; /* Insert null now. */ - expanded = history_expand (linebuffer, &history_value); - if (expanded) - { - /* Print the changes. */ - printf_unfiltered ("%s\n", history_value); - - /* If there was an error, call this function again. */ - if (expanded < 0) - { - free (history_value); - return command_line_input (prompt_arg, repeat, annotation_suffix); - } - if (strlen (history_value) > linelength) - { - linelength = strlen (history_value) + 1; - linebuffer = (char *) xrealloc (linebuffer, linelength); - } - strcpy (linebuffer, history_value); - p = linebuffer + strlen (linebuffer); - free (history_value); - } - } - - /* If we just got an empty line, and that is supposed - to repeat the previous command, return the value in the - global buffer. */ - if (repeat && p == linebuffer) - return line; - for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++); - if (repeat && !*p1) - return line; - - *p = 0; - - /* Add line to history if appropriate. */ - if (instream == stdin - && ISATTY (stdin) && *linebuffer) - add_history (linebuffer); - - /* Note: lines consisting solely of comments are added to the command - history. This is useful when you type a command, and then - realize you don't want to execute it quite yet. You can comment - out the command and then later fetch it from the value history - and remove the '#'. The kill ring is probably better, but some - people are in the habit of commenting things out. */ - if (*p1 == '#') - *p1 = '\0'; /* Found a comment. */ +static void +stop_sig (int signo) +{ +#if STOP_SIGNAL == SIGTSTP + signal (SIGTSTP, SIG_DFL); +#if HAVE_SIGPROCMASK + { + sigset_t zero; - /* Save into global buffer if appropriate. */ - if (repeat) - { - if (linelength > linesize) - { - line = xrealloc (line, linelength); - linesize = linelength; - } - strcpy (line, linebuffer); - return line; - } + sigemptyset (&zero); + sigprocmask (SIG_SETMASK, &zero, 0); + } +#elif HAVE_SIGSETMASK + sigsetmask (0); +#endif + kill (getpid (), SIGTSTP); + signal (SIGTSTP, stop_sig); +#else + signal (STOP_SIGNAL, stop_sig); +#endif + printf_unfiltered ("%s", get_prompt ()); + gdb_flush (gdb_stdout); - return linebuffer; + /* Forget about any previous command -- null line now will do nothing. */ + dont_repeat (); } - - -/* Expand the body_list of COMMAND so that it can hold NEW_LENGTH - code bodies. This is typically used when we encounter an "else" - clause for an "if" command. */ +#endif /* STOP_SIGNAL */ +/* Initialize signal handlers. */ static void -realloc_body_list (struct command_line *command, int new_length) +float_handler (int signo) { - int n; - struct command_line **body_list; - - n = command->body_count; - - /* Nothing to do? */ - if (new_length <= n) - return; - - body_list = (struct command_line **) - xmalloc (sizeof (struct command_line *) * new_length); - - memcpy (body_list, command->body_list, sizeof (struct command_line *) * n); - - free (command->body_list); - command->body_list = body_list; - command->body_count = new_length; + /* This message is based on ANSI C, section 4.7. Note that integer + divide by zero causes this, so "float" is a misnomer. */ + signal (SIGFPE, float_handler); + error ("Erroneous arithmetic operation."); } -/* Read one line from the input stream. If the command is an "else" or - "end", return such an indication to the caller. */ - -static enum misc_command_type -read_next_line (struct command_line **command) +static void +do_nothing (int signo) { - char *p, *p1, *prompt_ptr, control_prompt[256]; - int i = 0; - - if (control_level >= 254) - error ("Control nesting too deep!\n"); - - /* Set a prompt based on the nesting of the control commands. */ - if (instream == stdin || (instream == 0 && readline_hook != NULL)) - { - for (i = 0; i < control_level; i++) - control_prompt[i] = ' '; - control_prompt[i] = '>'; - control_prompt[i + 1] = '\0'; - prompt_ptr = (char *) &control_prompt[0]; - } - else - prompt_ptr = NULL; - - p = command_line_input (prompt_ptr, instream == stdin, "commands"); - - /* Not sure what to do here. */ - if (p == NULL) - return end_command; - - /* Strip leading and trailing whitespace. */ - while (*p == ' ' || *p == '\t') - p++; - - p1 = p + strlen (p); - while (p1 != p && (p1[-1] == ' ' || p1[-1] == '\t')) - p1--; - - /* Blanks and comments don't really do anything, but we need to - distinguish them from else, end and other commands which can be - executed. */ - if (p1 == p || p[0] == '#') - return nop_command; - - /* Is this the end of a simple, while, or if control structure? */ - if (p1 - p == 3 && !strncmp (p, "end", 3)) - return end_command; - - /* Is the else clause of an if control structure? */ - if (p1 - p == 4 && !strncmp (p, "else", 4)) - return else_command; - - /* Check for while, if, break, continue, etc and build a new command - line structure for them. */ - if (p1 - p > 5 && !strncmp (p, "while", 5)) - *command = build_command_line (while_control, p + 6); - else if (p1 - p > 2 && !strncmp (p, "if", 2)) - *command = build_command_line (if_control, p + 3); - else if (p1 - p == 10 && !strncmp (p, "loop_break", 10)) - { - *command = (struct command_line *) - xmalloc (sizeof (struct command_line)); - (*command)->next = NULL; - (*command)->line = NULL; - (*command)->control_type = break_control; - (*command)->body_count = 0; - (*command)->body_list = NULL; - } - else if (p1 - p == 13 && !strncmp (p, "loop_continue", 13)) - { - *command = (struct command_line *) - xmalloc (sizeof (struct command_line)); - (*command)->next = NULL; - (*command)->line = NULL; - (*command)->control_type = continue_control; - (*command)->body_count = 0; - (*command)->body_list = NULL; - } - else - { - /* A normal command. */ - *command = (struct command_line *) - xmalloc (sizeof (struct command_line)); - (*command)->next = NULL; - (*command)->line = savestring (p, p1 - p); - (*command)->control_type = simple_control; - (*command)->body_count = 0; - (*command)->body_list = NULL; - } - - /* Nothing special. */ - return ok_command; + /* Under System V the default disposition of a signal is reinstated after + the signal is caught and delivered to an application process. On such + systems one must restore the replacement signal handler if one wishes + to continue handling the signal in one's program. On BSD systems this + is not needed but it is harmless, and it simplifies the code to just do + it unconditionally. */ + signal (signo, do_nothing); } -/* Recursively read in the control structures and create a command_line - structure from them. - - The parent_control parameter is the control structure in which the - following commands are nested. */ - -static enum command_control_type -recurse_read_control_structure (struct command_line *current_cmd) +static void +init_signals (void) { - int current_body, i; - enum misc_command_type val; - enum command_control_type ret; - struct command_line **body_ptr, *child_tail, *next; - - child_tail = NULL; - current_body = 1; - - /* Sanity checks. */ - if (current_cmd->control_type == simple_control) - { - error ("Recursed on a simple control type\n"); - return invalid_control; - } - - if (current_body > current_cmd->body_count) - { - error ("Allocated body is smaller than this command type needs\n"); - return invalid_control; - } - - /* Read lines from the input stream and build control structures. */ - while (1) - { - dont_repeat (); - - next = NULL; - val = read_next_line (&next); - - /* Just skip blanks and comments. */ - if (val == nop_command) - continue; - - if (val == end_command) - { - if (current_cmd->control_type == while_control - || current_cmd->control_type == if_control) - { - /* Success reading an entire control structure. */ - ret = simple_control; - break; - } - else - { - ret = invalid_control; - break; - } - } + signal (SIGINT, request_quit); - /* Not the end of a control structure. */ - if (val == else_command) - { - if (current_cmd->control_type == if_control - && current_body == 1) - { - realloc_body_list (current_cmd, 2); - current_body = 2; - child_tail = NULL; - continue; - } - else - { - ret = invalid_control; - break; - } - } + /* If SIGTRAP was set to SIG_IGN, then the SIG_IGN will get passed + to the inferior and breakpoints will be ignored. */ +#ifdef SIGTRAP + signal (SIGTRAP, SIG_DFL); +#endif - if (child_tail) - { - child_tail->next = next; - } - else - { - body_ptr = current_cmd->body_list; - for (i = 1; i < current_body; i++) - body_ptr++; + /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get + passed to the inferior, which we don't want. It would be + possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but + on BSD4.3 systems using vfork, that can affect the + GDB process as well as the inferior (the signal handling tables + might be in memory, shared between the two). Since we establish + a handler for SIGQUIT, when we call exec it will set the signal + to SIG_DFL for us. */ + signal (SIGQUIT, do_nothing); +#ifdef SIGHUP + if (signal (SIGHUP, do_nothing) != SIG_IGN) + signal (SIGHUP, disconnect); +#endif + signal (SIGFPE, float_handler); - *body_ptr = next; +#if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) + signal (SIGWINCH, SIGWINCH_HANDLER); +#endif +} + +/* The current saved history number from operate-and-get-next. + This is -1 if not valid. */ +static int operate_saved_history = -1; - } +/* This is put on the appropriate hook and helps operate-and-get-next + do its work. */ +void +gdb_rl_operate_and_get_next_completion () +{ + int delta = where_history () - operate_saved_history; + /* The `key' argument to rl_get_previous_history is ignored. */ + rl_get_previous_history (delta, 0); + operate_saved_history = -1; - child_tail = next; + /* readline doesn't automatically update the display for us. */ + rl_redisplay (); - /* If the latest line is another control structure, then recurse - on it. */ - if (next->control_type == while_control - || next->control_type == if_control) - { - control_level++; - ret = recurse_read_control_structure (next); - control_level--; + after_char_processing_hook = NULL; + rl_pre_input_hook = NULL; +} - if (ret != simple_control) - break; - } +/* This is a gdb-local readline command handler. It accepts the + current command line (like RET does) and, if this command was taken + from the history, arranges for the next command in the history to + appear on the command line when the prompt returns. + We ignore the arguments. */ +static int +gdb_rl_operate_and_get_next (int count, int key) +{ + if (event_loop_p) + { + /* Use the async hook. */ + after_char_processing_hook = gdb_rl_operate_and_get_next_completion; + } + else + { + /* This hook only works correctly when we are using the + synchronous readline. */ + rl_pre_input_hook = (Function *) gdb_rl_operate_and_get_next_completion; } - dont_repeat (); - - return ret; + /* Add 1 because we eventually want the next line. */ + operate_saved_history = where_history () + 1; + return rl_newline (1, key); } + +/* Read one line from the command input stream `instream' + into the local static buffer `linebuffer' (whose current length + is `linelength'). + The buffer is made bigger as necessary. + Returns the address of the start of the line. + + NULL is returned for end of file. -/* Read lines from the input stream and accumulate them in a chain of - struct command_line's, which is then returned. For input from a - terminal, the special command "end" is used to mark the end of the - input, and is not included in the returned chain of commands. */ + *If* the instream == stdin & stdin is a terminal, the line read + is copied into the file line saver (global var char *line, + length linesize) so that it can be duplicated. -#define END_MESSAGE "End with a line saying just \"end\"." + This routine either uses fancy command line editing or + simple input as the user has requested. */ -struct command_line * -read_command_lines (char *prompt_arg, int from_tty) +char * +command_line_input (char *prompt_arg, int repeat, char *annotation_suffix) { - struct command_line *head, *tail, *next; - struct cleanup *old_chain; - enum command_control_type ret; - enum misc_command_type val; + static char *linebuffer = 0; + static unsigned linelength = 0; + register char *p; + char *p1; + char *rl; + char *local_prompt = prompt_arg; + char *nline; + char got_eof = 0; + + /* The annotation suffix must be non-NULL. */ + if (annotation_suffix == NULL) + annotation_suffix = ""; - control_level = 0; - if (readline_begin_hook) + if (annotation_level > 1 && instream == stdin) { - /* Note - intentional to merge messages with no newline */ - (*readline_begin_hook) ("%s %s\n", prompt_arg, END_MESSAGE); + local_prompt = alloca ((prompt_arg == NULL ? 0 : strlen (prompt_arg)) + + strlen (annotation_suffix) + 40); + if (prompt_arg == NULL) + local_prompt[0] = '\0'; + else + strcpy (local_prompt, prompt_arg); + strcat (local_prompt, "\n\032\032"); + strcat (local_prompt, annotation_suffix); + strcat (local_prompt, "\n"); } - else if (from_tty && input_from_terminal_p ()) + + if (linebuffer == 0) { - printf_unfiltered ("%s\n%s\n", prompt_arg, END_MESSAGE); - gdb_flush (gdb_stdout); + linelength = 80; + linebuffer = (char *) xmalloc (linelength); } - head = tail = NULL; - old_chain = NULL; + p = linebuffer; - while (1) + /* Control-C quits instantly if typed while in this loop + since it should not wait until the user types a newline. */ + immediate_quit++; +#ifdef STOP_SIGNAL + if (job_control) { - val = read_next_line (&next); + if (event_loop_p) + signal (STOP_SIGNAL, handle_stop_sig); + else + signal (STOP_SIGNAL, stop_sig); + } +#endif - /* Ignore blank lines or comments. */ - if (val == nop_command) - continue; + while (1) + { + /* Make sure that all output has been output. Some machines may let + you get away with leaving out some of the gdb_flush, but not all. */ + wrap_here (""); + gdb_flush (gdb_stdout); + gdb_flush (gdb_stderr); - if (val == end_command) + if (source_file_name != NULL) { - ret = simple_control; - break; + ++source_line_number; + sprintf (source_error, + "%s%s:%d: Error in sourced command file:\n", + source_pre_error, + source_file_name, + source_line_number); + error_pre_print = source_error; } - if (val != ok_command) + if (annotation_level > 1 && instream == stdin) { - ret = invalid_control; - break; + printf_unfiltered ("\n\032\032pre-"); + printf_unfiltered (annotation_suffix); + printf_unfiltered ("\n"); } - if (next->control_type == while_control - || next->control_type == if_control) + /* Don't use fancy stuff if not talking to stdin. */ + if (readline_hook && instream == NULL) { - control_level++; - ret = recurse_read_control_structure (next); - control_level--; - - if (ret == invalid_control) - break; + rl = (*readline_hook) (local_prompt); } - - if (tail) + else if (command_editing_p && instream == stdin && ISATTY (instream)) { - tail->next = next; + rl = readline (local_prompt); } else { - head = next; - old_chain = make_cleanup_free_command_lines (&head); + rl = gdb_readline (local_prompt); } - tail = next; - } - - dont_repeat (); - if (head) - { - if (ret != invalid_control) + if (annotation_level > 1 && instream == stdin) { - discard_cleanups (old_chain); + printf_unfiltered ("\n\032\032post-"); + printf_unfiltered (annotation_suffix); + printf_unfiltered ("\n"); } - else - do_cleanups (old_chain); - } - - if (readline_end_hook) - { - (*readline_end_hook) (); - } - return (head); -} -/* Free a chain of struct command_line's. */ - -void -free_command_lines (struct command_line **lptr) -{ - register struct command_line *l = *lptr; - register struct command_line *next; - struct command_line **blist; - int i; - - while (l) - { - if (l->body_count > 0) + if (!rl || rl == (char *) EOF) { - blist = l->body_list; - for (i = 0; i < l->body_count; i++, blist++) - free_command_lines (blist); + got_eof = 1; + break; } - next = l->next; - free (l->line); - free ((PTR) l); - l = next; - } -} - -static void -do_free_command_lines_cleanup (void *arg) -{ - free_command_lines (arg); -} - -static struct cleanup * -make_cleanup_free_command_lines (struct command_line **arg) -{ - return make_cleanup (do_free_command_lines_cleanup, arg); -} - -/* Add an element to the list of info subcommands. */ - -struct cmd_list_element * -add_info (char *name, void (*fun) (char *, int), char *doc) -{ - return add_cmd (name, no_class, fun, doc, &infolist); -} - -/* Add an alias to the list of info subcommands. */ - -struct cmd_list_element * -add_info_alias (char *name, char *oldname, int abbrev_flag) -{ - return add_alias_cmd (name, oldname, 0, abbrev_flag, &infolist); -} - -/* The "info" command is defined as a prefix, with allow_unknown = 0. - Therefore, its own definition is called only for "info" with no args. */ - -/* ARGSUSED */ -static void -info_command (char *arg, int from_tty) -{ - printf_unfiltered ("\"info\" must be followed by the name of an info command.\n"); - help_list (infolist, "info ", -1, gdb_stdout); -} - -/* The "complete" command is used by Emacs to implement completion. */ - -/* ARGSUSED */ -static void -complete_command (char *arg, int from_tty) -{ - int i; - int argpoint; - char *completion; + if (strlen (rl) + 1 + (p - linebuffer) > linelength) + { + linelength = strlen (rl) + 1 + (p - linebuffer); + nline = (char *) xrealloc (linebuffer, linelength); + p += nline - linebuffer; + linebuffer = nline; + } + p1 = rl; + /* Copy line. Don't copy null at end. (Leaves line alone + if this was just a newline) */ + while (*p1) + *p++ = *p1++; - dont_repeat (); + xfree (rl); /* Allocated in readline. */ - if (arg == NULL) - arg = ""; - argpoint = strlen (arg); + if (p == linebuffer || *(p - 1) != '\\') + break; - for (completion = line_completion_function (arg, i = 0, arg, argpoint); - completion; - completion = line_completion_function (arg, ++i, arg, argpoint)) - { - printf_unfiltered ("%s\n", completion); - free (completion); + p--; /* Put on top of '\'. */ + local_prompt = (char *) 0; } -} - -/* The "show" command with no arguments shows all the settings. */ - -/* ARGSUSED */ -static void -show_command (char *arg, int from_tty) -{ - cmd_show_list (showlist, from_tty, ""); -} - -/* Add an element to the list of commands. */ - -struct cmd_list_element * -add_com (char *name, enum command_class class, void (*fun) (char *, int), - char *doc) -{ - return add_cmd (name, class, fun, doc, &cmdlist); -} - -/* Add an alias or abbreviation command to the list of commands. */ - -struct cmd_list_element * -add_com_alias (char *name, char *oldname, enum command_class class, - int abbrev_flag) -{ - return add_alias_cmd (name, oldname, class, abbrev_flag, &cmdlist); -} - -void -error_no_arg (char *why) -{ - error ("Argument required (%s).", why); -} - -/* Provide documentation on command or list given by COMMAND. FROM_TTY - is ignored. */ -/* ARGSUSED */ -static void -help_command (char *command, int from_tty) -{ - help_cmd (command, gdb_stdout); -} - -static void -validate_comname (char *comname) -{ - register char *p; +#ifdef STOP_SIGNAL + if (job_control) + signal (STOP_SIGNAL, SIG_DFL); +#endif + immediate_quit--; - if (comname == 0) - error_no_arg ("name of command to define"); + if (got_eof) + return NULL; - p = comname; - while (*p) +#define SERVER_COMMAND_LENGTH 7 + server_command = + (p - linebuffer > SERVER_COMMAND_LENGTH) + && STREQN (linebuffer, "server ", SERVER_COMMAND_LENGTH); + if (server_command) { - if (!isalnum (*p) && *p != '-' && *p != '_') - error ("Junk in argument list: \"%s\"", p); - p++; + /* Note that we don't set `line'. Between this and the check in + dont_repeat, this insures that repeating will still do the + right thing. */ + *p = '\0'; + return linebuffer + SERVER_COMMAND_LENGTH; } -} - -/* This is just a placeholder in the command data structures. */ -static void -user_defined_command (char *ignore, int from_tty) -{ -} -static void -define_command (char *comname, int from_tty) -{ -#define MAX_TMPBUF 128 - enum cmd_hook_type - { - CMD_NO_HOOK = 0, - CMD_PRE_HOOK, - CMD_POST_HOOK - }; - register struct command_line *cmds; - register struct cmd_list_element *c, *newc, *oldc, *hookc = 0; - char *tem = comname; - char *tem2; - char tmpbuf[MAX_TMPBUF]; - int hook_type = CMD_NO_HOOK; - int hook_name_size = 0; - -#define HOOK_STRING "hook-" -#define HOOK_LEN 5 -#define HOOK_POST_STRING "hookpost-" -#define HOOK_POST_LEN 9 - - validate_comname (comname); - - /* Look it up, and verify that we got an exact match. */ - c = lookup_cmd (&tem, cmdlist, "", -1, 1); - if (c && !STREQ (comname, c->name)) - c = 0; - - if (c) + /* Do history expansion if that is wished. */ + if (history_expansion_p && instream == stdin + && ISATTY (instream)) { - if (c->class == class_user || c->class == class_alias) - tem = "Redefine command \"%s\"? "; - else - tem = "Really redefine built-in command \"%s\"? "; - if (!query (tem, c->name)) - error ("Command \"%s\" not redefined.", c->name); - } - - /* If this new command is a hook, then mark the command which it - is hooking. Note that we allow hooking `help' commands, so that - we can hook the `stop' pseudo-command. */ + char *history_value; + int expanded; - if (!strncmp (comname, HOOK_STRING, HOOK_LEN)) - { - hook_type = CMD_PRE_HOOK; - hook_name_size = HOOK_LEN; - } - else if (!strncmp (comname, HOOK_POST_STRING, HOOK_POST_LEN)) - { - hook_type = CMD_POST_HOOK; - hook_name_size = HOOK_POST_LEN; - } - - if (hook_type != CMD_NO_HOOK) - { - /* Look up cmd it hooks, and verify that we got an exact match. */ - tem = comname + hook_name_size; - hookc = lookup_cmd (&tem, cmdlist, "", -1, 0); - if (hookc && !STREQ (comname + hook_name_size, hookc->name)) - hookc = 0; - if (!hookc) + *p = '\0'; /* Insert null now. */ + expanded = history_expand (linebuffer, &history_value); + if (expanded) { - warning ("Your new `%s' command does not hook any existing command.", - comname); - if (!query ("Proceed? ")) - error ("Not confirmed."); + /* Print the changes. */ + printf_unfiltered ("%s\n", history_value); + + /* If there was an error, call this function again. */ + if (expanded < 0) + { + xfree (history_value); + return command_line_input (prompt_arg, repeat, annotation_suffix); + } + if (strlen (history_value) > linelength) + { + linelength = strlen (history_value) + 1; + linebuffer = (char *) xrealloc (linebuffer, linelength); + } + strcpy (linebuffer, history_value); + p = linebuffer + strlen (linebuffer); + xfree (history_value); } } - comname = savestring (comname, strlen (comname)); - - /* If the rest of the commands will be case insensitive, this one - should behave in the same manner. */ - for (tem = comname; *tem; tem++) - if (isupper (*tem)) - *tem = tolower (*tem); + /* If we just got an empty line, and that is supposed + to repeat the previous command, return the value in the + global buffer. */ + if (repeat && p == linebuffer) + return line; + for (p1 = linebuffer; *p1 == ' ' || *p1 == '\t'; p1++); + if (repeat && !*p1) + return line; - sprintf (tmpbuf, "Type commands for definition of \"%s\".", comname); - cmds = read_command_lines (tmpbuf, from_tty); + *p = 0; - if (c && c->class == class_user) - free_command_lines (&c->user_commands); + /* Add line to history if appropriate. */ + if (instream == stdin + && ISATTY (stdin) && *linebuffer) + add_history (linebuffer); - newc = add_cmd (comname, class_user, user_defined_command, - (c && c->class == class_user) - ? c->doc : savestring ("User-defined.", 13), &cmdlist); - newc->user_commands = cmds; + /* Note: lines consisting solely of comments are added to the command + history. This is useful when you type a command, and then + realize you don't want to execute it quite yet. You can comment + out the command and then later fetch it from the value history + and remove the '#'. The kill ring is probably better, but some + people are in the habit of commenting things out. */ + if (*p1 == '#') + *p1 = '\0'; /* Found a comment. */ - /* If this new command is a hook, then mark both commands as being - tied. */ - if (hookc) + /* Save into global buffer if appropriate. */ + if (repeat) { - switch (hook_type) - { - case CMD_PRE_HOOK: - hookc->hook_pre = newc; /* Target gets hooked. */ - newc->hookee_pre = hookc; /* We are marked as hooking target cmd. */ - break; - case CMD_POST_HOOK: - hookc->hook_pre = newc; /* Target gets hooked. */ - newc->hookee_pre = hookc; /* We are marked as hooking target cmd. */ - break; - default: - /* Should never come here as hookc would be 0. */ - } + if (linelength > linesize) + { + line = xrealloc (line, linelength); + linesize = linelength; + } + strcpy (line, linebuffer); + return line; } -} - -static void -document_command (char *comname, int from_tty) -{ - struct command_line *doclines; - register struct cmd_list_element *c; - char *tem = comname; - char tmpbuf[128]; - - validate_comname (comname); - - c = lookup_cmd (&tem, cmdlist, "", 0, 1); - if (c->class != class_user) - error ("Command \"%s\" is built-in.", comname); - - sprintf (tmpbuf, "Type documentation for \"%s\".", comname); - doclines = read_command_lines (tmpbuf, from_tty); - - if (c->doc) - free (c->doc); - - { - register struct command_line *cl1; - register int len = 0; - - for (cl1 = doclines; cl1; cl1 = cl1->next) - len += strlen (cl1->line) + 1; - - c->doc = (char *) xmalloc (len + 1); - *c->doc = 0; - - for (cl1 = doclines; cl1; cl1 = cl1->next) - { - strcat (c->doc, cl1->line); - if (cl1->next) - strcat (c->doc, "\n"); - } - } - - free_command_lines (&doclines); + return linebuffer; } /* Print the GDB banner. */ @@ -3158,16 +1316,11 @@ print_gdb_version (struct ui_file *stream) program to parse, and is just canonical program name and version number, which starts after last space. */ -#ifdef UI_OUT - /* Print it console style until a format is defined */ - fprintf_filtered (stream, "GNU gdb %s (UI_OUT)\n", version); -#else fprintf_filtered (stream, "GNU gdb %s\n", version); -#endif /* Second line is a copyright notice. */ - fprintf_filtered (stream, "Copyright 2000 Free Software Foundation, Inc.\n"); + fprintf_filtered (stream, "Copyright 2002 Free Software Foundation, Inc.\n"); /* Following the copyright is a brief statement that the program is free software, that users are free to copy and change it on @@ -3193,16 +1346,6 @@ There is absolutely no warranty for GDB. Type \"show warranty\" for details.\n" } fprintf_filtered (stream, "\"."); } - -/* ARGSUSED */ -static void -show_version (char *args, int from_tty) -{ - immediate_quit++; - print_gdb_version (gdb_stdout); - printf_filtered ("\n"); - immediate_quit--; -} /* get_prompt: access method for the GDB prompt string. */ @@ -3240,7 +1383,7 @@ get_prompt_1 (void *data) /* formatted prompt */ { char fmt[40], *promptp, *outp, *tmp; - value_ptr arg_val; + struct value *arg_val; DOUBLEST doubleval; LONGEST longval; CORE_ADDR addrval; @@ -3292,7 +1435,7 @@ get_prompt_1 (void *data) if (*promptp != gdb_prompt_escape) error ("Syntax error at prompt position %d", - promptp - local_prompt); + (int) (promptp - local_prompt)); else { promptp++; /* skip second escape char */ @@ -3332,7 +1475,7 @@ get_prompt_1 (void *data) break; case TYPE_CODE_PTR: elt_type = check_typedef (TYPE_TARGET_TYPE (arg_type)); - addrval = value_as_pointer (arg_val); + addrval = value_as_address (arg_val); if (TYPE_LENGTH (elt_type) == 1 && TYPE_CODE (elt_type) == TYPE_CODE_INT && @@ -3357,7 +1500,7 @@ get_prompt_1 (void *data) from bad user-supplied format string? */ sprintf (outp, fmt[0] == 0 ? default_fmt : fmt, tmp); - free (tmp); + xfree (tmp); } else { @@ -3438,7 +1581,7 @@ get_prompt_1 (void *data) break; /* void type -- no output */ default: error ("bad data type at prompt position %d", - promptp - local_prompt); + (int) (promptp - local_prompt)); break; } outp += strlen (outp); @@ -3475,7 +1618,7 @@ set_prompt (char *s) /* ??rehrauer: I don't know why this fails, since it looks as though assignments to prompt are wrapped in calls to savestring... if (prompt != NULL) - free (prompt); + xfree (prompt); */ if (event_loop_p) PROMPT (0) = savestring (s, strlen (s)); @@ -3490,7 +1633,7 @@ set_prompt (char *s) int quit_confirm (void) { - if (inferior_pid != 0 && target_has_execution) + if (! ptid_equal (inferior_ptid, null_ptid) && target_has_execution) { char *s; @@ -3522,12 +1665,12 @@ quit_force (char *args, int from_tty) value of that expression. */ if (args) { - value_ptr val = parse_and_eval (args); + struct value *val = parse_and_eval (args); exit_code = (int) value_as_long (val); } - if (inferior_pid != 0 && target_has_execution) + if (! ptid_equal (inferior_ptid, null_ptid) && target_has_execution) { if (attach_flag) target_detach (args, from_tty); @@ -3544,29 +1687,9 @@ quit_force (char *args, int from_tty) do_final_cleanups (ALL_CLEANUPS); /* Do any final cleanups before exiting */ -#if defined(TUI) - /* tuiDo((TuiOpaqueFuncPtr)tuiCleanUp); */ - /* The above does not need to be inside a tuiDo(), since - * it is not manipulating the curses screen, but rather, - * it is tearing it down. - */ - if (tui_version) - tuiCleanUp (); -#endif - exit (exit_code); } -/* Handle the quit command. */ - -void -quit_command (char *args, int from_tty) -{ - if (!quit_confirm ()) - error ("Not confirmed."); - quit_force (args, from_tty); -} - /* Returns whether GDB is running on a terminal and whether the user desires that questions be asked of them on that terminal. */ @@ -3576,235 +1699,6 @@ input_from_terminal_p (void) return gdb_has_a_terminal () && (instream == stdin) & caution; } -/* ARGSUSED */ -static void -pwd_command (char *args, int from_tty) -{ - if (args) - error ("The \"pwd\" command does not take an argument: %s", args); - getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)); - - if (!STREQ (gdb_dirbuf, current_directory)) - printf_unfiltered ("Working directory %s\n (canonically %s).\n", - current_directory, gdb_dirbuf); - else - printf_unfiltered ("Working directory %s.\n", current_directory); -} - -void -cd_command (char *dir, int from_tty) -{ - int len; - /* Found something other than leading repetitions of "/..". */ - int found_real_path; - char *p; - - /* If the new directory is absolute, repeat is a no-op; if relative, - repeat might be useful but is more likely to be a mistake. */ - dont_repeat (); - - if (dir == 0) - error_no_arg ("new working directory"); - - dir = tilde_expand (dir); - make_cleanup (free, dir); - - if (chdir (dir) < 0) - perror_with_name (dir); - -#if defined(_WIN32) || defined(__MSDOS__) - /* There's too much mess with DOSish names like "d:", "d:.", - "d:./foo" etc. Instead of having lots of special #ifdef'ed code, - simply get the canonicalized name of the current directory. */ - dir = getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)); -#endif - - len = strlen (dir); - if (SLASH_P (dir[len - 1])) - { - /* Remove the trailing slash unless this is a root directory - (including a drive letter on non-Unix systems). */ - if (!(len == 1) /* "/" */ -#if defined(_WIN32) || defined(__MSDOS__) - && !(!SLASH_P (*dir) && ROOTED_P (dir) && len <= 3) /* "d:/" */ -#endif - ) - len--; - } - - dir = savestring (dir, len); - if (ROOTED_P (dir)) - current_directory = dir; - else - { - if (SLASH_P (current_directory[strlen (current_directory) - 1])) - current_directory = concat (current_directory, dir, NULL); - else - current_directory = concat (current_directory, SLASH_STRING, dir, NULL); - free (dir); - } - - /* Now simplify any occurrences of `.' and `..' in the pathname. */ - - found_real_path = 0; - for (p = current_directory; *p;) - { - if (SLASH_P (p[0]) && p[1] == '.' && (p[2] == 0 || SLASH_P (p[2]))) - strcpy (p, p + 2); - else if (SLASH_P (p[0]) && p[1] == '.' && p[2] == '.' - && (p[3] == 0 || SLASH_P (p[3]))) - { - if (found_real_path) - { - /* Search backwards for the directory just before the "/.." - and obliterate it and the "/..". */ - char *q = p; - while (q != current_directory && !SLASH_P (q[-1])) - --q; - - if (q == current_directory) - /* current_directory is - a relative pathname ("can't happen"--leave it alone). */ - ++p; - else - { - strcpy (q - 1, p + 3); - p = q - 1; - } - } - else - /* We are dealing with leading repetitions of "/..", for example - "/../..", which is the Mach super-root. */ - p += 3; - } - else - { - found_real_path = 1; - ++p; - } - } - - forget_cached_source_info (); - - if (from_tty) - pwd_command ((char *) 0, 1); -} - -struct source_cleanup_lines_args -{ - int old_line; - char *old_file; - char *old_pre_error; - char *old_error_pre_print; -}; - -static void -source_cleanup_lines (PTR args) -{ - struct source_cleanup_lines_args *p = - (struct source_cleanup_lines_args *) args; - source_line_number = p->old_line; - source_file_name = p->old_file; - source_pre_error = p->old_pre_error; - error_pre_print = p->old_error_pre_print; -} - -/* ARGSUSED */ -static void -do_fclose_cleanup (void *stream) -{ - fclose (stream); -} - -void -source_command (char *args, int from_tty) -{ - FILE *stream; - struct cleanup *old_cleanups; - char *file = args; - struct source_cleanup_lines_args old_lines; - int needed_length; - - if (file == NULL) - { - error ("source command requires pathname of file to source."); - } - - file = tilde_expand (file); - old_cleanups = make_cleanup (free, file); - - stream = fopen (file, FOPEN_RT); - if (!stream) - { - if (from_tty) - perror_with_name (file); - else - return; - } - - make_cleanup (do_fclose_cleanup, stream); - - old_lines.old_line = source_line_number; - old_lines.old_file = source_file_name; - old_lines.old_pre_error = source_pre_error; - old_lines.old_error_pre_print = error_pre_print; - make_cleanup (source_cleanup_lines, &old_lines); - source_line_number = 0; - source_file_name = file; - source_pre_error = error_pre_print == NULL ? "" : error_pre_print; - source_pre_error = savestring (source_pre_error, strlen (source_pre_error)); - make_cleanup (free, source_pre_error); - /* This will get set every time we read a line. So it won't stay "" for - long. */ - error_pre_print = ""; - - needed_length = strlen (source_file_name) + strlen (source_pre_error) + 80; - if (source_error_allocated < needed_length) - { - source_error_allocated *= 2; - if (source_error_allocated < needed_length) - source_error_allocated = needed_length; - if (source_error == NULL) - source_error = xmalloc (source_error_allocated); - else - source_error = xrealloc (source_error, source_error_allocated); - } - - read_command_file (stream); - - do_cleanups (old_cleanups); -} - -/* ARGSUSED */ -static void -echo_command (char *text, int from_tty) -{ - char *p = text; - register int c; - - if (text) - while ((c = *p++) != '\0') - { - if (c == '\\') - { - /* \ at end of argument is used after spaces - so they won't be lost. */ - if (*p == 0) - return; - - c = parse_escape (&p); - if (c >= 0) - printf_filtered ("%c", c); - } - else - printf_filtered ("%c", c); - } - - /* Force this output to appear now. */ - wrap_here (""); - gdb_flush (gdb_stdout); -} - /* ARGSUSED */ static void dont_repeat_command (char *ignored, int from_tty) @@ -3817,7 +1711,7 @@ dont_repeat_command (char *ignored, int from_tty) /* Number of commands to print in each call to show_commands. */ #define Hist_print 10 -static void +void show_commands (char *args, int from_tty) { /* Index for history commands. Relative to history_base. */ @@ -3831,8 +1725,6 @@ show_commands (char *args, int from_tty) than the number of the last command). Relative to history_base. */ int hist_len; -extern HIST_ENTRY *history_get (int); - /* Print out some of the commands from the command history. */ /* First determine the length of the history list. */ hist_len = history_size; @@ -3852,7 +1744,7 @@ extern HIST_ENTRY *history_get (int); ; else /* "info editing " should print around command number . */ - num = (parse_and_eval_address (args) - history_base) - Hist_print / 2; + num = (parse_and_eval_long (args) - history_base) - Hist_print / 2; } /* "show commands" means print the last Hist_print commands. */ else @@ -3909,7 +1801,7 @@ set_history_size_command (char *args, int from_tty, struct cmd_list_element *c) } /* ARGSUSED */ -static void +void set_history (char *args, int from_tty) { printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n"); @@ -3917,7 +1809,7 @@ set_history (char *args, int from_tty) } /* ARGSUSED */ -static void +void show_history (char *args, int from_tty) { cmd_show_list (showhistlist, from_tty, ""); @@ -3927,7 +1819,7 @@ int info_verbose = 0; /* Default verbose msgs off */ /* Called by do_setshow_command. An elaborate joke. */ /* ARGSUSED */ -static void +void set_verbose (char *args, int from_tty, struct cmd_list_element *c) { char *cmdname = "verbose"; @@ -3947,54 +1839,6 @@ set_verbose (char *args, int from_tty, struct cmd_list_element *c) } } -static void -float_handler (int signo) -{ - /* This message is based on ANSI C, section 4.7. Note that integer - divide by zero causes this, so "float" is a misnomer. */ - signal (SIGFPE, float_handler); - error ("Erroneous arithmetic operation."); -} - -static void -set_debug (char *arg, int from_tty) -{ - printf_unfiltered ("\"set debug\" must be followed by the name of a print subcommand.\n"); - help_list (setdebuglist, "set debug ", -1, gdb_stdout); -} - -static void -show_debug (char *args, int from_tty) -{ - cmd_show_list (showdebuglist, from_tty, ""); -} - -static void -init_cmd_lists (void) -{ - cmdlist = NULL; - infolist = NULL; - enablelist = NULL; - disablelist = NULL; - togglelist = NULL; - stoplist = NULL; - deletelist = NULL; - enablebreaklist = NULL; - setlist = NULL; - unsetlist = NULL; - showlist = NULL; - sethistlist = NULL; - showhistlist = NULL; - unsethistlist = NULL; - maintenancelist = NULL; - maintenanceinfolist = NULL; - maintenanceprintlist = NULL; - setprintlist = NULL; - showprintlist = NULL; - setchecklist = NULL; - showchecklist = NULL; -} - /* Init the history buffer. Note that we are called after the init file(s) * have been read so that the user can change the history file via his * .gdbinit file (for instance). The GDBHISTFILE environment variable @@ -4056,6 +1900,12 @@ init_main (void) async_annotation_suffix = "prompt"; /* Set the variable associated with the setshow prompt command. */ new_async_prompt = savestring (PROMPT (0), strlen (PROMPT (0))); + + /* If gdb was started with --annotate=2, this is equivalent to + the user entering the command 'set annotate 2' at the gdb + prompt, so we need to do extra processing. */ + if (annotation_level > 1) + set_async_annotation_level (NULL, 0, NULL); } gdb_prompt_escape = 0; /* default to none. */ @@ -4066,47 +1916,14 @@ init_main (void) /* Setup important stuff for command line editing. */ rl_completion_entry_function = (int (*)()) readline_line_completion_function; - rl_completer_word_break_characters = gdb_completer_word_break_characters; - rl_completer_quote_characters = gdb_completer_quote_characters; + rl_completer_word_break_characters = + get_gdb_completer_word_break_characters (); + rl_completer_quote_characters = get_gdb_completer_quote_characters (); rl_readline_name = "gdb"; - /* Define the classes of commands. - They will appear in the help list in the reverse of this order. */ - - add_cmd ("internals", class_maintenance, NO_FUNCTION, - "Maintenance commands.\n\ -Some gdb commands are provided just for use by gdb maintainers.\n\ -These commands are subject to frequent change, and may not be as\n\ -well documented as user commands.", - &cmdlist); - add_cmd ("obscure", class_obscure, NO_FUNCTION, "Obscure features.", &cmdlist); - add_cmd ("aliases", class_alias, NO_FUNCTION, "Aliases of other commands.", &cmdlist); - add_cmd ("user-defined", class_user, NO_FUNCTION, "User-defined commands.\n\ -The commands in this class are those defined by the user.\n\ -Use the \"define\" command to define a command.", &cmdlist); - add_cmd ("support", class_support, NO_FUNCTION, "Support facilities.", &cmdlist); - if (!dbx_commands) - add_cmd ("status", class_info, NO_FUNCTION, "Status inquiries.", &cmdlist); - add_cmd ("files", class_files, NO_FUNCTION, "Specifying and examining files.", &cmdlist); - add_cmd ("breakpoints", class_breakpoint, NO_FUNCTION, "Making program stop at certain points.", &cmdlist); - add_cmd ("data", class_vars, NO_FUNCTION, "Examining data.", &cmdlist); - add_cmd ("stack", class_stack, NO_FUNCTION, "Examining the stack.\n\ -The stack is made up of stack frames. Gdb assigns numbers to stack frames\n\ -counting from zero for the innermost (currently executing) frame.\n\n\ -At any time gdb identifies one frame as the \"selected\" frame.\n\ -Variable lookups are done with respect to the selected frame.\n\ -When the program being debugged stops, gdb selects the innermost frame.\n\ -The commands below can be used to select other frames by number or address.", - &cmdlist); - add_cmd ("running", class_run, NO_FUNCTION, "Running the program.", &cmdlist); - - add_com ("pwd", class_files, pwd_command, - "Print working directory. This is used for your program as well."); - c = add_cmd ("cd", class_files, cd_command, - "Set working directory to DIR for debugger and program being debugged.\n\ -The change does not take effect for the program being debugged\n\ -until the next time it is started.", &cmdlist); - c->completer = filename_completer; + /* The name for this defun comes from Bash, where it originated. + 15 is Control-o, the same binding this function has in Bash. */ + rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next, 15); /* The set prompt command is different depending whether or not the async version is run. NOTE: this difference is going to @@ -4126,7 +1943,7 @@ until the next time it is started.", &cmdlist); (char *) &new_async_prompt, "Set gdb's prompt", &setlist); add_show_from_set (c, &showlist); - c->function.sfunc = set_async_prompt; + set_cmd_sfunc (c, set_async_prompt); } add_show_from_set @@ -4136,55 +1953,10 @@ until the next time it is started.", &cmdlist); &setlist), &showlist); - add_com ("echo", class_support, echo_command, - "Print a constant string. Give string as argument.\n\ -C escape sequences may be used in the argument.\n\ -No newline is added at the end of the argument;\n\ -use \"\\n\" if you want a newline to be printed.\n\ -Since leading and trailing whitespace are ignored in command arguments,\n\ -if you want to print some you must use \"\\\" before leading whitespace\n\ -to be printed or after trailing whitespace."); - add_com ("document", class_support, document_command, - "Document a user-defined command.\n\ -Give command name as argument. Give documentation on following lines.\n\ -End with a line of just \"end\"."); - add_com ("define", class_support, define_command, - "Define a new command name. Command name is argument.\n\ -Definition appears on following lines, one command per line.\n\ -End with a line of just \"end\".\n\ -Use the \"document\" command to give documentation for the new command.\n\ -Commands defined in this way may have up to ten arguments."); - -#ifdef __STDC__ - c = add_cmd ("source", class_support, source_command, - "Read commands from a file named FILE.\n\ -Note that the file \"" GDBINIT_FILENAME "\" is read automatically in this way\n\ -when gdb is started.", &cmdlist); -#else - /* Punt file name, we can't help it easily. */ - c = add_cmd ("source", class_support, source_command, - "Read commands from a file named FILE.\n\ -Note that the file \".gdbinit\" is read automatically in this way\n\ -when gdb is started.", &cmdlist); -#endif - c->completer = filename_completer; - - add_com ("quit", class_support, quit_command, "Exit gdb."); - add_com ("help", class_support, help_command, "Print list of commands."); - add_com_alias ("q", "quit", class_support, 1); - add_com_alias ("h", "help", class_support, 1); - add_com ("dont-repeat", class_support, dont_repeat_command, "Don't repeat this command.\n\ Primarily used inside of user-defined commands that should not be repeated when\n\ hitting return."); - c = add_set_cmd ("verbose", class_support, var_boolean, (char *) &info_verbose, - "Set ", - &setlist), - add_show_from_set (c, &showlist); - c->function.sfunc = set_verbose; - set_verbose (NULL, 0, c); - /* The set editing command is different depending whether or not the async version is run. NOTE: this difference is going to disappear as we make the event loop be the default engine of gdb. */ @@ -4207,22 +1979,9 @@ Without an argument, command line editing is enabled. To edit, use\n\ EMACS-like or VI-like commands like control-P or ESC.", &setlist); add_show_from_set (c, &showlist); - c->function.sfunc = set_async_editing_command; + set_cmd_sfunc (c, set_async_editing_command); } - add_prefix_cmd ("history", class_support, set_history, - "Generic command for setting command history parameters.", - &sethistlist, "set history ", 0, &setlist); - add_prefix_cmd ("history", class_support, show_history, - "Generic command for showing command history parameters.", - &showhistlist, "show history ", 0, &showlist); - - add_show_from_set - (add_set_cmd ("expansion", no_class, var_boolean, (char *) &history_expansion_p, - "Set history expansion on command input.\n\ -Without an argument, history expansion is enabled.", &sethistlist), - &showhistlist); - add_show_from_set (add_set_cmd ("save", no_class, var_boolean, (char *) &write_history_p, "Set saving of the history record on exit.\n\ @@ -4231,16 +1990,17 @@ Without an argument, saving is enabled.", &sethistlist), &showhistlist); c = add_set_cmd ("size", no_class, var_integer, (char *) &history_size, - "Set the size of the command history, \n\ + "Set the size of the command history,\n\ ie. the number of previous commands to keep a record of.", &sethistlist); add_show_from_set (c, &showhistlist); - c->function.sfunc = set_history_size_command; + set_cmd_sfunc (c, set_history_size_command); - add_show_from_set - (add_set_cmd ("filename", no_class, var_filename, (char *) &history_filename, - "Set the filename in which to record the command history\n\ - (the list of previous commands of which a record is kept).", &sethistlist), - &showhistlist); + c = add_set_cmd ("filename", no_class, var_filename, + (char *) &history_filename, + "Set the filename in which to record the command history\n\ +(the list of previous commands of which a record is kept).", &sethistlist); + set_cmd_completer (c, filename_completer); + add_show_from_set (c, &showhistlist); add_show_from_set (add_set_cmd ("confirm", class_support, var_boolean, @@ -4249,73 +2009,6 @@ ie. the number of previous commands to keep a record of.", &sethistlist); &setlist), &showlist); - add_prefix_cmd ("info", class_info, info_command, - "Generic command for showing things about the program being debugged.", - &infolist, "info ", 0, &cmdlist); - add_com_alias ("i", "info", class_info, 1); - - add_com ("complete", class_obscure, complete_command, - "List the completions for the rest of the line as a command."); - - add_prefix_cmd ("show", class_info, show_command, - "Generic command for showing things about the debugger.", - &showlist, "show ", 0, &cmdlist); - /* Another way to get at the same thing. */ - add_info ("set", show_command, "Show all GDB settings."); - - add_cmd ("commands", no_class, show_commands, - "Show the history of commands you typed.\n\ -You can supply a command number to start with, or a `+' to start after\n\ -the previous command number shown.", - &showlist); - - add_cmd ("version", no_class, show_version, - "Show what version of GDB this is.", &showlist); - - add_com ("while", class_support, while_command, - "Execute nested commands WHILE the conditional expression is non zero.\n\ -The conditional expression must follow the word `while' and must in turn be\n\ -followed by a new line. The nested commands must be entered one per line,\n\ -and should be terminated by the word `end'."); - - add_com ("if", class_support, if_command, - "Execute nested commands once IF the conditional expression is non zero.\n\ -The conditional expression must follow the word `if' and must in turn be\n\ -followed by a new line. The nested commands must be entered one per line,\n\ -and should be terminated by the word 'else' or `end'. If an else clause\n\ -is used, the same rules apply to its nested commands as to the first ones."); - - /* If target is open when baud changes, it doesn't take effect until the - next open (I think, not sure). */ - add_show_from_set (add_set_cmd ("remotebaud", no_class, - var_zinteger, (char *) &baud_rate, - "Set baud rate for remote serial I/O.\n\ -This value is used to set the speed of the serial port when debugging\n\ -using remote targets.", &setlist), - &showlist); - - c = add_set_cmd ("remotedebug", no_class, var_zinteger, - (char *) &remote_debug, - "Set debugging of remote protocol.\n\ -When enabled, each packet sent or received with the remote target\n\ -is displayed.", &setlist); - deprecate_cmd (c, "set debug remote"); - deprecate_cmd (add_show_from_set (c, &showlist), "show debug remote"); - - add_show_from_set (add_set_cmd ("remote", no_class, var_zinteger, - (char *) &remote_debug, - "Set debugging of remote protocol.\n\ -When enabled, each packet sent or received with the remote target\n\ -is displayed.", &setdebuglist), - &showdebuglist); - - add_show_from_set ( - add_set_cmd ("remotetimeout", no_class, var_integer, (char *) &remote_timeout, - "Set timeout limit to wait for target to respond.\n\ -This value is used to set the time limit for gdb to wait for a response\n\ -from the target.", &setlist), - &showlist); - /* The set annotate command is different depending whether or not the async version is run. NOTE: this difference is going to disappear as we make the event loop be the default engine of @@ -4337,7 +2030,7 @@ from the target.", &setlist), 2 == output annotated suitably for use by programs that control GDB.", &setlist); add_show_from_set (c, &showlist); - c->function.sfunc = set_async_annotation_level; + set_cmd_sfunc (c, set_async_annotation_level); } if (event_loop_p) { @@ -4347,11 +2040,65 @@ from the target.", &setlist), Use \"on\" to enable the notification, and \"off\" to disable it.", &setlist), &showlist); } - add_prefix_cmd ("debug", no_class, set_debug, - "Generic command for setting gdb debugging flags", - &setdebuglist, "set debug ", 0, &setlist); +} + +void +gdb_init (char *argv0) +{ + if (pre_init_ui_hook) + pre_init_ui_hook (); + + /* Run the init function of each source file */ + + getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)); + current_directory = gdb_dirbuf; + +#ifdef __MSDOS__ + /* Make sure we return to the original directory upon exit, come + what may, since the OS doesn't do that for us. */ + make_final_cleanup (do_chdir_cleanup, xstrdup (current_directory)); +#endif + + init_cmd_lists (); /* This needs to be done first */ + initialize_targets (); /* Setup target_terminal macros for utils.c */ + initialize_utils (); /* Make errors and warnings possible */ + initialize_all_files (); + initialize_current_architecture (); + init_cli_cmds(); + init_main (); /* But that omits this file! Do it now */ + + /* The signal handling mechanism is different depending whether or + not the async version is run. NOTE: in the future we plan to make + the event loop be the default engine of gdb, and this difference + will disappear. */ + if (event_loop_p) + async_init_signals (); + else + init_signals (); + + /* We need a default language for parsing expressions, so simple things like + "set width 0" won't fail if no language is explicitly set in a config file + or implicitly set by reading an executable during startup. */ + set_language (language_c); + expected_language = current_language; /* don't warn about the change. */ + + /* Allow another UI to initialize. If the UI fails to initialize, and + it wants GDB to revert to the CLI, it should clear init_ui_hook. */ + if (init_ui_hook) + init_ui_hook (argv0); + + /* Install the default UI */ + if (!init_ui_hook) + { + uiout = cli_out_new (gdb_stdout); - add_prefix_cmd ("debug", no_class, show_debug, - "Generic command for showing gdb debugging flags", - &showdebuglist, "show debug ", 0, &showlist); + /* All the interpreters should have had a look at things by now. + Initialize the selected interpreter. */ + if (interpreter_p) + { + fprintf_unfiltered (gdb_stderr, "Interpreter `%s' unrecognized.\n", + interpreter_p); + exit (1); + } + } }