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Diffstat (limited to 'gdb/top.c')
| -rw-r--r-- | gdb/top.c | 3677 |
1 files changed, 0 insertions, 3677 deletions
diff --git a/gdb/top.c b/gdb/top.c deleted file mode 100644 index 189e3c3..0000000 --- a/gdb/top.c +++ /dev/null @@ -1,3677 +0,0 @@ -/* Top level stuff for GDB, the GNU debugger. - Copyright 1986, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 1998 - Free Software Foundation, Inc. - -This file is part of GDB. - -This program is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2 of the License, or -(at your option) any later version. - -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with this program; if not, write to the Free Software -Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ - -#include "defs.h" -#include "gdbcmd.h" -#include "call-cmds.h" -#include "symtab.h" -#include "inferior.h" -#include "signals.h" -#include "target.h" -#include "breakpoint.h" -#include "gdbtypes.h" -#include "expression.h" -#include "value.h" -#include "language.h" -#include "terminal.h" /* For job_control. */ -#include "annotate.h" -#include <setjmp.h> -#include "top.h" - -/* readline include files */ -#include <readline/readline.h> -#include <readline/history.h> - -/* readline defines this. */ -#undef savestring - -#include <sys/types.h> -#ifdef HAVE_UNISTD_H -#include <unistd.h> -#endif - -#include "gdb_string.h" -#include "gdb_stat.h" -#include <ctype.h> - -extern void initialize_utils PARAMS ((void)); - -/* Prototypes for local functions */ - -static void dont_repeat_command PARAMS ((char *, int)); - -static void source_cleanup_lines PARAMS ((PTR)); - -static void user_defined_command PARAMS ((char *, int)); - -static void init_signals PARAMS ((void)); - -#ifdef STOP_SIGNAL -static void stop_sig PARAMS ((int)); -#endif - -static char * line_completion_function PARAMS ((char *, int, char *, int)); - -static char * readline_line_completion_function PARAMS ((char *, int)); - -static void command_loop_marker PARAMS ((int)); - -static void while_command PARAMS ((char *, int)); - -static void if_command PARAMS ((char *, int)); - -static struct command_line * -build_command_line PARAMS ((enum command_control_type, char *)); - -static struct command_line * -get_command_line PARAMS ((enum command_control_type, char *)); - -static void realloc_body_list PARAMS ((struct command_line *, int)); - -static enum misc_command_type read_next_line PARAMS ((struct command_line **)); - -static enum command_control_type -recurse_read_control_structure PARAMS ((struct command_line *)); - -static struct cleanup * setup_user_args PARAMS ((char *)); - -static char * locate_arg PARAMS ((char *)); - -static char * insert_args PARAMS ((char *)); - -static void arg_cleanup PARAMS ((void)); - -static void init_main PARAMS ((void)); - -static void init_cmd_lists PARAMS ((void)); - -static void float_handler PARAMS ((int)); - -static void init_signals PARAMS ((void)); - -static void set_verbose PARAMS ((char *, int, struct cmd_list_element *)); - -static void show_history PARAMS ((char *, int)); - -static void set_history PARAMS ((char *, int)); - -static void set_history_size_command PARAMS ((char *, int, - struct cmd_list_element *)); - -static void show_commands PARAMS ((char *, int)); - -static void echo_command PARAMS ((char *, int)); - -static void pwd_command PARAMS ((char *, int)); - -static void show_version PARAMS ((char *, int)); - -static void document_command PARAMS ((char *, int)); - -static void define_command PARAMS ((char *, int)); - -static void validate_comname PARAMS ((char *)); - -static void help_command PARAMS ((char *, int)); - -static void show_command PARAMS ((char *, int)); - -static void info_command PARAMS ((char *, int)); - -static void complete_command PARAMS ((char *, int)); - -static void do_nothing PARAMS ((int)); - -#ifdef SIGHUP -static int quit_cover PARAMS ((PTR)); - -static void disconnect PARAMS ((int)); -#endif - -static void source_cleanup PARAMS ((FILE *)); - -/* If this definition isn't overridden by the header files, assume - that isatty and fileno exist on this system. */ -#ifndef ISATTY -#define ISATTY(FP) (isatty (fileno (FP))) -#endif - -/* Initialization file name for gdb. This is overridden in some configs. */ - -#ifndef GDBINIT_FILENAME -#define GDBINIT_FILENAME ".gdbinit" -#endif -char gdbinit[] = GDBINIT_FILENAME; - -int inhibit_gdbinit = 0; - -/* If nonzero, and GDB has been configured to be able to use windows, - attempt to open them upon startup. */ - -int use_windows = 1; - -/* Version number of GDB, as a string. */ - -extern char *version; - -/* Canonical host name as a string. */ - -extern char *host_name; - -/* Canonical target name as a string. */ - -extern char *target_name; - -extern char lang_frame_mismatch_warn[]; /* language.c */ - -/* Flag for whether we want all the "from_tty" gubbish printed. */ - -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. */ - -#if MAINTENANCE_CMDS -struct cmd_list_element *maintenancelist; -#endif - -/* Chain containing all defined "maintenance info" subcommands. */ - -#if MAINTENANCE_CMDS -struct cmd_list_element *maintenanceinfolist; -#endif - -/* Chain containing all defined "maintenance print" subcommands. */ - -#if MAINTENANCE_CMDS -struct cmd_list_element *maintenanceprintlist; -#endif - -struct cmd_list_element *setprintlist; - -struct cmd_list_element *showprintlist; - -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. */ - -FILE *instream; - -/* Current working directory. */ - -char *current_directory; - -/* The directory name is actually stored here (usually). */ -char gdb_dirbuf[1024]; - -/* Function to call before reading a command, if nonzero. - The function receives two args: an input stream, - and a prompt string. */ - -void (*window_hook) PARAMS ((FILE *, char *)); - -int epoch_interface; -int xgdb_verbose; - -/* gdb prints this when reading a command interactively */ -static char *prompt; - -/* Buffer used for reading command lines, and the size - allocated for it so far. */ - -char *line; -int linesize = 100; - -/* Nonzero if the current command is modified by "server ". This - affects things like recording into the command history, comamnds - repeating on RETURN, etc. This is so a user interface (emacs, GUI, - whatever) can issue its own commands and also send along commands - from the user, and have the user not notice that the user interface - is issuing commands too. */ -int server_command; - -/* Baud rate specified for talking to serial target systems. Default - is left as -1, so targets can choose their own defaults. */ -/* FIXME: This means that "show remotebaud" and gr_files_info can print -1 - or (unsigned int)-1. This is a Bad User Interface. */ - -int baud_rate = -1; - -/* Timeout limit for response from target. */ - -int remote_timeout = 20; /* Set default to 20 */ - -/* Non-zero tells remote* modules to output debugging info. */ - -int remote_debug = 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 -#ifdef SIGTSTP -#define STOP_SIGNAL SIGTSTP -static void stop_sig PARAMS ((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. */ - -void (*init_ui_hook) PARAMS ((char *argv0)); -#ifdef __CYGWIN32__ -void (*ui_loop_hook) PARAMS ((int)); -#endif - -/* Called instead of command_loop at top level. Can be invoked via - return_to_top_level. */ - -void (*command_loop_hook) PARAMS ((void)); - - -/* Called instead of fputs for all output. */ - -void (*fputs_unfiltered_hook) PARAMS ((const char *linebuffer, GDB_FILE *stream)); - -/* Called when the target says something to the host, which may - want to appear in a different window. */ - -void (*target_output_hook) PARAMS ((char *)); - -/* Called from print_frame_info to list the line we stopped in. */ - -void (*print_frame_info_listing_hook) PARAMS ((struct symtab *s, int line, - int stopline, int noerror)); -/* Replaces most of query. */ - -int (*query_hook) PARAMS ((const char *, va_list)); - -/* Replaces most of warning. */ - -void (*warning_hook) PARAMS ((const char *, va_list)); - -/* Called from gdb_flush to flush output. */ - -void (*flush_hook) PARAMS ((GDB_FILE *stream)); - -/* These three functions support getting lines of text from the user. They - are used in sequence. First readline_begin_hook is called with a text - string that might be (for example) a message for the user to type in a - sequence of commands to be executed at a breakpoint. If this function - calls back to a GUI, it might take this opportunity to pop up a text - interaction window with this message. Next, readline_hook is called - with a prompt that is emitted prior to collecting the user input. - It can be called multiple times. Finally, readline_end_hook is called - to notify the GUI that we are done with the interaction window and it - can close it. */ - -void (*readline_begin_hook) PARAMS ((char *, ...)); -char * (*readline_hook) PARAMS ((char *)); -void (*readline_end_hook) PARAMS ((void)); - -/* Called as appropriate to notify the interface of the specified breakpoint - conditions. */ - -void (*create_breakpoint_hook) PARAMS ((struct breakpoint *bpt)); -void (*delete_breakpoint_hook) PARAMS ((struct breakpoint *bpt)); -void (*modify_breakpoint_hook) PARAMS ((struct breakpoint *bpt)); - -/* Called during long calculations to allow GUI to repair window damage, and to - check for stop buttons, etc... */ - -void (*interactive_hook) PARAMS ((void)); - -/* Called when the registers have changed, as a hint to a GUI - to minimize window update. */ - -void (*registers_changed_hook) PARAMS ((void)); - -/* Tell the GUI someone changed the register REGNO. -1 means - that the caller does not know which register changed or - that several registers have changed (see value_assign).*/ -void (*register_changed_hook) PARAMS ((int regno)); - -/* Tell the GUI someone changed LEN bytes of memory at ADDR */ -void (*memory_changed_hook) PARAMS ((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) PARAMS ((int pid, struct target_waitstatus *status)); - -/* Used by UI as a wrapper around command execution. May do various things - like enabling/disabling buttons, etc... */ - -void (*call_command_hook) PARAMS ((struct cmd_list_element *c, char *cmd, - int from_tty)); - -/* Called when the current thread changes. Argument is thread id. */ - -void (*context_hook) PARAMS ((int id)); - -/* Takes control from error (). Typically used to prevent longjmps out of the - middle of the GUI. Usually used in conjunction with a catch routine. */ - -NORETURN void (*error_hook) PARAMS ((void)) ATTR_NORETURN; - - -/* Where to go for return_to_top_level (RETURN_ERROR). */ -SIGJMP_BUF error_return; -/* Where to go for return_to_top_level (RETURN_QUIT). */ -SIGJMP_BUF quit_return; - -/* Return for reason REASON. This generally gets back to the command - loop, but can be caught via catch_errors. */ - -NORETURN void -return_to_top_level (reason) - enum return_reason reason; -{ - quit_flag = 0; - immediate_quit = 0; - - /* Perhaps it would be cleaner to do this via the cleanup chain (not sure - I can think of a reason why that is vital, though). */ - bpstat_clear_actions(stop_bpstat); /* Clear queued breakpoint commands */ - - disable_current_display (); - do_cleanups (ALL_CLEANUPS); - - if (annotation_level > 1) - switch (reason) - { - case RETURN_QUIT: - annotate_quit (); - break; - case RETURN_ERROR: - annotate_error (); - break; - } - - (NORETURN void) SIGLONGJMP - (reason == RETURN_ERROR ? error_return : quit_return, 1); -} - -/* 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. - - 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). - This is an OK restriction; with very few exceptions immediate_quit can - be replaced by judicious use of QUIT. - - MASK specifies what to catch; it is normally set to - RETURN_MASK_ALL, if for no other reason than that the code which - calls catch_errors might not be set up to deal with a quit which - isn't caught. But if the code can deal with it, it generally - should be RETURN_MASK_ERROR, unless for some reason it is more - useful to abort only the portion of the operation inside the - catch_errors. Note that quit should return to the command line - fairly quickly, even if some further processing is being done. */ - -int -catch_errors (func, args, errstring, mask) - catch_errors_ftype *func; - PTR args; - char *errstring; - return_mask mask; -{ - SIGJMP_BUF saved_error; - SIGJMP_BUF saved_quit; - SIGJMP_BUF tmp_jmp; - int val; - struct cleanup *saved_cleanup_chain; - char *saved_error_pre_print; - char *saved_quit_pre_print; - - saved_cleanup_chain = save_cleanups (); - saved_error_pre_print = error_pre_print; - saved_quit_pre_print = quit_pre_print; - - if (mask & RETURN_MASK_ERROR) - { - memcpy ((char *)saved_error, (char *)error_return, sizeof (SIGJMP_BUF)); - error_pre_print = errstring; - } - if (mask & RETURN_MASK_QUIT) - { - memcpy (saved_quit, quit_return, sizeof (SIGJMP_BUF)); - quit_pre_print = errstring; - } - - if (SIGSETJMP (tmp_jmp) == 0) - { - if (mask & RETURN_MASK_ERROR) - memcpy (error_return, tmp_jmp, sizeof (SIGJMP_BUF)); - if (mask & RETURN_MASK_QUIT) - memcpy (quit_return, tmp_jmp, sizeof (SIGJMP_BUF)); - val = (*func) (args); - } - else - val = 0; - - restore_cleanups (saved_cleanup_chain); - - if (mask & RETURN_MASK_ERROR) - { - memcpy (error_return, saved_error, sizeof (SIGJMP_BUF)); - error_pre_print = saved_error_pre_print; - } - if (mask & RETURN_MASK_QUIT) - { - memcpy (quit_return, saved_quit, sizeof (SIGJMP_BUF)); - quit_pre_print = saved_quit_pre_print; - } - return val; -} - -/* Handler for SIGHUP. */ - -#ifdef SIGHUP -static void -disconnect (signo) -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(). */ - -static int -quit_cover (s) - PTR 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; -} -#endif /* defined SIGHUP */ - -/* Line number we are currently in in a file which is being sourced. */ -static int source_line_number; - -/* Name of the file we are sourcing. */ -static char *source_file_name; - -/* Buffer containing the error_pre_print used by the source stuff. - Malloc'd. */ -static char *source_error; -static int source_error_allocated; - -/* Something to glom on to the start of error_pre_print if source_file_name - is set. */ -static char *source_pre_error; - -/* Clean up on error during a "source" command (or execution of a - user-defined command). */ - -static void -source_cleanup (stream) - FILE *stream; -{ - /* Restore the previous input stream. */ - instream = stream; -} - -/* Read commands from STREAM. */ -void -read_command_file (stream) - FILE *stream; -{ - struct cleanup *cleanups; - - cleanups = make_cleanup ((make_cleanup_func) source_cleanup, instream); - instream = stream; - command_loop (); - do_cleanups (cleanups); -} - -extern void init_proc PARAMS ((void)); - -void (*pre_init_ui_hook) PARAMS ((void)); - -void -gdb_init (argv0) - 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; - - 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 (); - init_main (); /* But that omits this file! Do it now */ - init_signals (); - - init_proc (); - - /* 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. */ - - if (init_ui_hook) - init_ui_hook (argv0); -} - -/* Allocate, initialize a new command line structure for one of the - control commands (if/while). */ - -static struct command_line * -build_command_line (type, args) - 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; -} - -/* Build and return a new command structure for the control commands - such as "if" and "while". */ - -static struct command_line * -get_command_line (type, arg) - enum command_control_type type; - char *arg; -{ - struct command_line *cmd; - struct cleanup *old_chain = NULL; - - /* Allocate and build a new command line structure. */ - cmd = build_command_line (type, arg); - - old_chain = make_cleanup ((make_cleanup_func) free_command_lines, &cmd); - - /* 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). */ -void -print_command_line (cmd, depth) - struct command_line *cmd; - unsigned int depth; -{ - unsigned int i; - - if (depth) - { - for (i = 0; i < depth; i++) - fputs_filtered (" ", gdb_stdout); - } - - /* A simple command, print it and return. */ - if (cmd->control_type == simple_control) - { - fputs_filtered (cmd->line, gdb_stdout); - fputs_filtered ("\n", gdb_stdout); - return; - } - - /* 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", gdb_stdout); - 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", gdb_stdout); - return; - } - - /* A while command. Recursively print its subcommands before returning. */ - if (cmd->control_type == while_control) - { - struct command_line *list; - fputs_filtered ("while ", gdb_stdout); - fputs_filtered (cmd->line, gdb_stdout); - fputs_filtered ("\n", gdb_stdout); - list = *cmd->body_list; - while (list) - { - print_command_line (list, depth + 1); - list = list->next; - } - } - - /* An if command. Recursively print both arms before returning. */ - if (cmd->control_type == if_control) - { - fputs_filtered ("if ", gdb_stdout); - fputs_filtered (cmd->line, gdb_stdout); - fputs_filtered ("\n", gdb_stdout); - /* The true arm. */ - print_command_line (cmd->body_list[0], depth + 1); - - /* Show the false arm if it exists. */ - if (cmd->body_count == 2) - { - if (depth) - { - for (i = 0; i < depth; i++) - fputs_filtered (" ", gdb_stdout); - } - fputs_filtered ("else\n", gdb_stdout); - print_command_line (cmd->body_list[1], depth + 1); - } - if (depth) - { - for (i = 0; i < depth; i++) - fputs_filtered (" ", gdb_stdout); - } - fputs_filtered ("end\n", gdb_stdout); - } -} - -/* Execute the command in CMD. */ - -enum command_control_type -execute_control_command (cmd) - struct command_line *cmd; -{ - 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 ((make_cleanup_func) 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 ((make_cleanup_func) free_current_contents, - &new_line); - expr = parse_expression (new_line); - make_cleanup ((make_cleanup_func) 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; - - /* Get the next statement. */ - current = current->next; - } - } - - /* Reset RET so that we don't recurse the break all the way down. */ - if (ret == break_control) - ret = simple_control; - - break; - } - - case if_control: - { - new_line = insert_args (cmd->line); - if (!new_line) - return invalid_control; - old_chain = make_cleanup ((make_cleanup_func) free_current_contents, - &new_line); - /* Parse the conditional for the if statement. */ - expr = parse_expression (new_line); - make_cleanup ((make_cleanup_func) 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; - } - - break; - } - - default: - warning ("Invalid control type in command structure."); - return invalid_control; - } - - 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 (arg, from_tty) - 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); -} - -/* "if" command support. Execute either the true or false arm depending - on the value of the if conditional. */ - -static void -if_command (arg, from_tty) - char *arg; - int from_tty; -{ - struct command_line *command = NULL; - - control_level = 1; - command = get_command_line (if_control, arg); - - if (command == NULL) - return; - - execute_control_command (command); - free_command_lines (&command); -} - -/* Cleanup */ -static void -arg_cleanup () -{ - struct user_args *oargs = user_args; - if (!user_args) - fatal ("Internal error, arg_cleanup called with no user args.\n"); - - user_args = user_args->next; - free (oargs); -} - -/* Bind the incomming arguments for a user defined command to - $arg0, $arg1 ... $argMAXUSERARGS. */ - -static struct cleanup * -setup_user_args (p) - char *p; -{ - struct user_args *args; - struct cleanup *old_chain; - unsigned int arg_count = 0; - - args = (struct user_args *)xmalloc (sizeof (struct user_args)); - memset (args, 0, sizeof (struct user_args)); - - args->next = user_args; - user_args = args; - - old_chain = make_cleanup ((make_cleanup_func) arg_cleanup, 0); - - if (p == NULL) - return old_chain; - - while (*p) - { - char *start_arg; - int squote = 0; - int dquote = 0; - int bsquote = 0; - - if (arg_count >= MAXUSERARGS) - { - error ("user defined function may only have %d arguments.\n", - MAXUSERARGS); - return old_chain; - } - - /* Strip whitespace. */ - while (*p == ' ' || *p == '\t') - p++; - - /* P now points to an argument. */ - start_arg = p; - user_args->a[arg_count].arg = p; - - /* Get to the end of this argument. */ - while (*p) - { - if (((*p == ' ' || *p == '\t')) && !squote && !dquote && !bsquote) - break; - else - { - if (bsquote) - bsquote = 0; - else if (*p == '\\') - bsquote = 1; - else if (squote) - { - if (*p == '\'') - squote = 0; - } - else if (dquote) - { - if (*p == '"') - dquote = 0; - } - else - { - if (*p == '\'') - squote = 1; - else if (*p == '"') - dquote = 1; - } - p++; - } - } - - user_args->a[arg_count].len = p - start_arg; - arg_count++; - user_args->count++; - } - return old_chain; -} - -/* Given character string P, return a point to the first argument ($arg), - or NULL if P contains no arguments. */ - -static char * -locate_arg (p) - char *p; -{ - while ((p = strchr (p, '$'))) - { - if (strncmp (p, "$arg", 4) == 0 && isdigit (p[4])) - return p; - p++; - } - return NULL; -} - -/* 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 (line) - 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 (c, args) - 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 ((make_cleanup_func) source_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 (p, from_tty) - char *p; - int from_tty; -{ - register struct cmd_list_element *c; - register enum language flang; - static int warned = 0; - /* FIXME: These should really be in an appropriate header file */ - extern void serial_log_command PARAMS ((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; - - c = lookup_cmd (&p, cmdlist, "", 0, 1); - /* 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 hooked, run the hook first. */ - if (c->hook) - execute_user_command (c->hook, (char *)0); - - 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); - } - - /* 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; - } - } -} - -/* ARGSUSED */ -static void -command_loop_marker (foo) - int foo; -{ -} - -/* Read commands from `instream' and execute them - until end of file or error reading instream. */ - -void -command_loop () -{ - 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, prompt); - - quit_flag = 0; - if (instream == stdin && stdin_is_tty) - reinitialize_more_filter (); - old_chain = make_cleanup ((make_cleanup_func) command_loop_marker, 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 ? 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 - } - } -} - -/* Commands call this if they do not want to be repeated by null lines. */ - -void -dont_repeat () -{ - 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 PRROMPT 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 (prrompt) - char *prrompt; -{ - int c; - char *result; - int input_index = 0; - int result_size = 80; - - if (prrompt) - { - /* 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 (prrompt, 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; -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!@#$%^&*()+=|~`}{[]\"';:?/>.<,"; - -/* 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 (text, prefix) - char *text; - char *prefix; -{ - return NULL; -} - -/* Complete on filenames. */ -char ** -filename_completer (text, word) - char *text; - char *word; -{ - /* From readline. */ - extern char *filename_completion_function PARAMS ((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; - } - /* 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); - } - } - subsequent_name = 1; - } -#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 (text, matches, line_buffer, point) - 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); - } - } - 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 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 (text, matches) - 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 (str) - 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 (signo) -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", 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 (signo) -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 () -{ - 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 (prrompt, repeat, annotation_suffix) - char *prrompt; - int repeat; - char *annotation_suffix; -{ - static char *linebuffer = 0; - static unsigned linelength = 0; - register char *p; - char *p1; - char *rl; - char *local_prompt = prrompt; - 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 ((prrompt == NULL ? 0 : strlen (prrompt)) - + strlen (annotation_suffix) + 40); - if (prrompt == NULL) - local_prompt[0] = '\0'; - else - strcpy (local_prompt, prrompt); - 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) - 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; - } - -#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 (prrompt, 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. */ - - /* Save into global buffer if appropriate. */ - if (repeat) - { - if (linelength > linesize) - { - line = xrealloc (line, linelength); - linesize = linelength; - } - strcpy (line, linebuffer); - return line; - } - - return linebuffer; -} - - -/* 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. */ - -static void -realloc_body_list (command, new_length) - struct command_line *command; - int new_length; -{ - 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; -} - -/* 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 (command) - struct command_line **command; -{ - 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; -} - -/* 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 (current_cmd) - struct command_line *current_cmd; -{ - 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; - } - } - - /* 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 (child_tail) - { - child_tail->next = next; - } - else - { - body_ptr = current_cmd->body_list; - for (i = 1; i < current_body; i++) - body_ptr++; - - *body_ptr = next; - - } - - child_tail = next; - - /* 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--; - - if (ret != simple_control) - break; - } - } - - dont_repeat (); - - return ret; -} - -/* 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. */ - -#define END_MESSAGE "End with a line saying just \"end\"." - -struct command_line * -read_command_lines (prompt, from_tty) -char *prompt; -int from_tty; -{ - struct command_line *head, *tail, *next; - struct cleanup *old_chain; - enum command_control_type ret; - enum misc_command_type val; - - if (readline_begin_hook) - { - /* Note - intentional to merge messages with no newline */ - (*readline_begin_hook) ("%s %s\n", prompt, END_MESSAGE); - } - else if (from_tty && input_from_terminal_p ()) - { - printf_unfiltered ("%s\n%s\n", prompt, END_MESSAGE); - gdb_flush (gdb_stdout); - } - - head = tail = NULL; - old_chain = NULL; - - while (1) - { - val = read_next_line (&next); - - /* Ignore blank lines or comments. */ - if (val == nop_command) - continue; - - if (val == end_command) - { - ret = simple_control; - break; - } - - if (val != ok_command) - { - ret = invalid_control; - break; - } - - if (next->control_type == while_control - || next->control_type == if_control) - { - control_level++; - ret = recurse_read_control_structure (next); - control_level--; - - if (ret == invalid_control) - break; - } - - if (tail) - { - tail->next = next; - } - else - { - head = next; - old_chain = make_cleanup ((make_cleanup_func) free_command_lines, - &head); - } - tail = next; - } - - dont_repeat (); - - if (head) - { - if (ret != invalid_control) - { - discard_cleanups (old_chain); - } - 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 (lptr) - 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) - { - blist = l->body_list; - for (i = 0; i < l->body_count; i++, blist++) - free_command_lines (blist); - } - next = l->next; - free (l->line); - free ((PTR)l); - l = next; - } -} - -/* Add an element to the list of info subcommands. */ - -void -add_info (name, fun, doc) - char *name; - void (*fun) PARAMS ((char *, int)); - char *doc; -{ - add_cmd (name, no_class, fun, doc, &infolist); -} - -/* Add an alias to the list of info subcommands. */ - -void -add_info_alias (name, oldname, abbrev_flag) - char *name; - char *oldname; - int abbrev_flag; -{ - 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 (arg, from_tty) - 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 (arg, from_tty) - char *arg; - int from_tty; -{ - int i; - int argpoint; - char *completion; - - dont_repeat (); - - if (arg == NULL) - arg = ""; - argpoint = strlen (arg); - - 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); - } -} - -/* The "show" command with no arguments shows all the settings. */ - -/* ARGSUSED */ -static void -show_command (arg, from_tty) - char *arg; - int from_tty; -{ - cmd_show_list (showlist, from_tty, ""); -} - -/* Add an element to the list of commands. */ - -void -add_com (name, class, fun, doc) - char *name; - enum command_class class; - void (*fun) PARAMS ((char *, int)); - char *doc; -{ - add_cmd (name, class, fun, doc, &cmdlist); -} - -/* Add an alias or abbreviation command to the list of commands. */ - -void -add_com_alias (name, oldname, class, abbrev_flag) - char *name; - char *oldname; - enum command_class class; - int abbrev_flag; -{ - add_alias_cmd (name, oldname, class, abbrev_flag, &cmdlist); -} - -void -error_no_arg (why) - char *why; -{ - error ("Argument required (%s).", why); -} - -/* ARGSUSED */ -static void -help_command (command, from_tty) - char *command; - int from_tty; /* Ignored */ -{ - help_cmd (command, gdb_stdout); -} - -static void -validate_comname (comname) - char *comname; -{ - register char *p; - - if (comname == 0) - error_no_arg ("name of command to define"); - - p = comname; - while (*p) - { - if (!isalnum(*p) && *p != '-' && *p != '_') - error ("Junk in argument list: \"%s\"", p); - p++; - } -} - -/* This is just a placeholder in the command data structures. */ -static void -user_defined_command (ignore, from_tty) - char *ignore; - int from_tty; -{ -} - -static void -define_command (comname, from_tty) - char *comname; - int from_tty; -{ - register struct command_line *cmds; - register struct cmd_list_element *c, *newc, *hookc = 0; - char *tem = comname; - char tmpbuf[128]; -#define HOOK_STRING "hook-" -#define HOOK_LEN 5 - - 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) - { - 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. */ - - if (!strncmp (comname, HOOK_STRING, HOOK_LEN)) - { - /* Look up cmd it hooks, and verify that we got an exact match. */ - tem = comname+HOOK_LEN; - hookc = lookup_cmd (&tem, cmdlist, "", -1, 0); - if (hookc && !STREQ (comname+HOOK_LEN, hookc->name)) - hookc = 0; - if (!hookc) - { - warning ("Your new `%s' command does not hook any existing command.", - comname); - if (!query ("Proceed? ")) - error ("Not confirmed."); - } - } - - 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); - - control_level = 0; - sprintf (tmpbuf, "Type commands for definition of \"%s\".", comname); - cmds = read_command_lines (tmpbuf, from_tty); - - if (c && c->class == class_user) - free_command_lines (&c->user_commands); - - 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; - - /* If this new command is a hook, then mark both commands as being - tied. */ - if (hookc) - { - hookc->hook = newc; /* Target gets hooked. */ - newc->hookee = hookc; /* We are marked as hooking target cmd. */ - } -} - -static void -document_command (comname, from_tty) - 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); -} - -/* Print the GDB banner. */ -void -print_gdb_version (stream) - GDB_FILE *stream; -{ - /* From GNU coding standards, first line is meant to be easy for a - program to parse, and is just canonical program name and version - number, which starts after last space. */ - - fprintf_filtered (stream, "GNU gdb %s\n", version); - - /* Second line is a copyright notice. */ - - fprintf_filtered (stream, "Copyright 1998 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 - certain conditions, that it is covered by the GNU GPL, and that - there is no warranty. */ - - fprintf_filtered (stream, "\ -GDB is free software, covered by the GNU General Public License, and you are\n\ -welcome to change it and/or distribute copies of it under certain conditions.\n\ -Type \"show copying\" to see the conditions.\n\ -There is absolutely no warranty for GDB. Type \"show warranty\" for details.\n"); - - /* After the required info we print the configuration information. */ - - fprintf_filtered (stream, "This GDB was configured as \""); - if (!STREQ (host_name, target_name)) - { - fprintf_filtered (stream, "--host=%s --target=%s", host_name, target_name); - } - else - { - fprintf_filtered (stream, "%s", host_name); - } - fprintf_filtered (stream, "\"."); -} - -/* ARGSUSED */ -static void -show_version (args, from_tty) - char *args; - int from_tty; -{ - immediate_quit++; - print_gdb_version (gdb_stdout); - printf_filtered ("\n"); - immediate_quit--; -} - -/* xgdb calls this to reprint the usual GDB prompt. Obsolete now that xgdb - is obsolete. */ - -void -print_prompt () -{ - printf_unfiltered ("%s", prompt); - gdb_flush (gdb_stdout); -} - -/* This replaces the above for the frontends: it returns a pointer - to the prompt. */ -char * -get_prompt () -{ - return prompt; -} - -void -set_prompt (s) - 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); -*/ - prompt = savestring (s, strlen (s)); -} - - -/* If necessary, make the user confirm that we should quit. Return - non-zero if we should quit, zero if we shouldn't. */ - -int -quit_confirm () -{ - if (inferior_pid != 0 && target_has_execution) - { - char *s; - - /* This is something of a hack. But there's no reliable way to - see if a GUI is running. The `use_windows' variable doesn't - cut it. */ - if (init_ui_hook) - s = "A debugging session is active.\nDo you still want to close the debugger?"; - else if (attach_flag) - s = "The program is running. Quit anyway (and detach it)? "; - else - s = "The program is running. Exit anyway? "; - - if (! query (s)) - return 0; - } - - return 1; -} - -/* Quit without asking for confirmation. */ - -void -quit_force (args, from_tty) - char *args; - int from_tty; -{ - int exit_code = 0; - - /* An optional expression may be used to cause gdb to terminate with the - value of that expression. */ - if (args) - { - value_ptr val = parse_and_eval (args); - - exit_code = (int) value_as_long (val); - } - - if (inferior_pid != 0 && target_has_execution) - { - if (attach_flag) - target_detach (args, from_tty); - else - target_kill (); - } - - /* UDI wants this, to kill the TIP. */ - target_close (1); - - /* Save the history information if it is appropriate to do so. */ - if (write_history_p && history_filename) - write_history (history_filename); - - 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 (args, from_tty) - 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. */ - -int -input_from_terminal_p () -{ - return gdb_has_a_terminal () && (instream == stdin) & caution; -} - -/* ARGSUSED */ -static void -pwd_command (args, from_tty) - 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 (dir, from_tty) - 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); - - len = strlen (dir); - dir = savestring (dir, len - (len > 1 && SLASH_P(dir[len-1]))); - if (ROOTED_P(dir)) - current_directory = dir; - else - { - if (SLASH_P (current_directory[0]) && current_directory[1] == '\0') - 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 (args) - 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 */ -void -source_command (args, from_tty) - 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 ((make_cleanup_func) fclose, 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 (text, from_tty) - 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 (ignored, from_tty) - char *ignored; - int from_tty; -{ - *line = 0; /* Can't call dont_repeat here because we're not - necessarily reading from stdin. */ -} - -/* Functions to manipulate command line editing control variables. */ - -/* Number of commands to print in each call to show_commands. */ -#define Hist_print 10 -static void -show_commands (args, from_tty) - char *args; - int from_tty; -{ - /* Index for history commands. Relative to history_base. */ - int offset; - - /* Number of the history entry which we are planning to display next. - Relative to history_base. */ - static int num = 0; - - /* The first command in the history which doesn't exist (i.e. one more - than the number of the last command). Relative to history_base. */ - int hist_len; - - extern HIST_ENTRY *history_get PARAMS ((int)); - - /* Print out some of the commands from the command history. */ - /* First determine the length of the history list. */ - hist_len = history_size; - for (offset = 0; offset < history_size; offset++) - { - if (!history_get (history_base + offset)) - { - hist_len = offset; - break; - } - } - - if (args) - { - if (args[0] == '+' && args[1] == '\0') - /* "info editing +" should print from the stored position. */ - ; - else - /* "info editing <exp>" should print around command number <exp>. */ - num = (parse_and_eval_address (args) - history_base) - Hist_print / 2; - } - /* "show commands" means print the last Hist_print commands. */ - else - { - num = hist_len - Hist_print; - } - - if (num < 0) - num = 0; - - /* If there are at least Hist_print commands, we want to display the last - Hist_print rather than, say, the last 6. */ - if (hist_len - num < Hist_print) - { - num = hist_len - Hist_print; - if (num < 0) - num = 0; - } - - for (offset = num; offset < num + Hist_print && offset < hist_len; offset++) - { - printf_filtered ("%5d %s\n", history_base + offset, - (history_get (history_base + offset))->line); - } - - /* The next command we want to display is the next one that we haven't - displayed yet. */ - num += Hist_print; - - /* If the user repeats this command with return, it should do what - "show commands +" does. This is unnecessary if arg is null, - because "show commands +" is not useful after "show commands". */ - if (from_tty && args) - { - args[0] = '+'; - args[1] = '\0'; - } -} - -/* Called by do_setshow_command. */ -/* ARGSUSED */ -static void -set_history_size_command (args, from_tty, c) - char *args; - int from_tty; - struct cmd_list_element *c; -{ - if (history_size == INT_MAX) - unstifle_history (); - else if (history_size >= 0) - stifle_history (history_size); - else - { - history_size = INT_MAX; - error ("History size must be non-negative"); - } -} - -/* ARGSUSED */ -static void -set_history (args, from_tty) - char *args; - int from_tty; -{ - printf_unfiltered ("\"set history\" must be followed by the name of a history subcommand.\n"); - help_list (sethistlist, "set history ", -1, gdb_stdout); -} - -/* ARGSUSED */ -static void -show_history (args, from_tty) - char *args; - int from_tty; -{ - cmd_show_list (showhistlist, from_tty, ""); -} - -int info_verbose = 0; /* Default verbose msgs off */ - -/* Called by do_setshow_command. An elaborate joke. */ -/* ARGSUSED */ -static void -set_verbose (args, from_tty, c) - char *args; - int from_tty; - struct cmd_list_element *c; -{ - char *cmdname = "verbose"; - struct cmd_list_element *showcmd; - - showcmd = lookup_cmd_1 (&cmdname, showlist, NULL, 1); - - if (info_verbose) - { - c->doc = "Set verbose printing of informational messages."; - showcmd->doc = "Show verbose printing of informational messages."; - } - else - { - c->doc = "Set verbosity."; - showcmd->doc = "Show verbosity."; - } -} - -static void -float_handler (signo) -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 -init_cmd_lists () -{ - 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; -#if MAINTENANCE_CMDS - maintenancelist = NULL; - maintenanceinfolist = NULL; - maintenanceprintlist = NULL; -#endif - 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 - * overrides all of this. - */ - -void -init_history() -{ - char *tmpenv; - - tmpenv = getenv ("HISTSIZE"); - if (tmpenv) - history_size = atoi (tmpenv); - else if (!history_size) - history_size = 256; - - stifle_history (history_size); - - tmpenv = getenv ("GDBHISTFILE"); - if (tmpenv) - history_filename = savestring (tmpenv, strlen(tmpenv)); - else if (!history_filename) { - /* We include the current directory so that if the user changes - directories the file written will be the same as the one - that was read. */ - history_filename = concat (current_directory, "/.gdb_history", NULL); - } - read_history (history_filename); -} - -static void -init_main () -{ - struct cmd_list_element *c; - -#ifdef DEFAULT_PROMPT - prompt = savestring (DEFAULT_PROMPT, strlen(DEFAULT_PROMPT)); -#else - prompt = savestring ("(gdb) ", 6); -#endif - - /* Set the important stuff up for command editing. */ - command_editing_p = 1; - history_expansion_p = 0; - write_history_p = 0; - - /* 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_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; - - add_show_from_set - (add_set_cmd ("prompt", class_support, var_string, (char *)&prompt, - "Set gdb's prompt", - &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); - - add_show_from_set - (add_set_cmd ("editing", class_support, var_boolean, (char *)&command_editing_p, - "Set editing of command lines as they are typed.\n\ -Use \"on\" to enable the editing, and \"off\" to disable it.\n\ -Without an argument, command line editing is enabled. To edit, use\n\ -EMACS-like or VI-like commands like control-P or ESC.", &setlist), - &showlist); - - 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\ -Use \"on\" to enable the saving, and \"off\" to disable it.\n\ -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\ -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; - - 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); - - add_show_from_set - (add_set_cmd ("confirm", class_support, var_boolean, - (char *)&caution, - "Set whether to confirm potentially dangerous operations.", - &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); - - add_show_from_set ( - 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), - &showlist); - - 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); - - c = add_set_cmd ("annotate", class_obscure, var_zinteger, - (char *)&annotation_level, "Set annotation_level.\n\ -0 == normal; 1 == fullname (for use when running under emacs)\n\ -2 == output annotated suitably for use by programs that control GDB.", - &setlist); - c = add_show_from_set (c, &showlist); -} |