| /* 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 "top.h" |
| #include "event-loop.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)); |
| |
| /* NOTE 4/29/99: this function will be static again, after we make the |
| event loop be the default command loop for gdb, and we merge |
| event-top.c into this file, top.c */ |
| /* static */ void command_loop_marker PARAMS ((int)); |
| |
| extern void set_async_editing_command PARAMS ((char *, int, struct cmd_list_element *)); |
| |
| extern void set_async_annotation_level PARAMS ((char *, int, struct cmd_list_element *)); |
| |
| extern void set_async_prompt PARAMS ((char *, int, struct cmd_list_element *)); |
| |
| 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 |
| /* NOTE 4/29/99: This function will be static again, once we modify |
| gdb to use the event loop as the default command loop and we merge |
| event-top.c into this file, top.c */ |
| /* static */ int quit_cover 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. */ |
| |
| struct cmd_list_element *maintenancelist; |
| |
| /* Chain containing all defined "maintenance info" subcommands. */ |
| |
| struct cmd_list_element *maintenanceinfolist; |
| |
| /* Chain containing all defined "maintenance print" subcommands. */ |
| |
| struct cmd_list_element *maintenanceprintlist; |
| |
| struct cmd_list_element *setprintlist; |
| |
| struct cmd_list_element *showprintlist; |
| |
| struct cmd_list_element *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)); |
| |
| /* This hook is called from within gdb's many mini-event loops which could |
| steal control from a real user interface's event loop. It returns |
| non-zero if the user is requesting a detach, zero otherwise. */ |
| |
| int (*ui_loop_hook) PARAMS ((int)); |
| |
| /* 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(). */ |
| |
| /* NOTE 4/29/99: This function will be static again, once we modify |
| gdb to use the event loop as the default command loop and we merge |
| event-top.c into this file, top.c */ |
| /* static */ int |
| quit_cover (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. */ |
| /* NOTE 4/29/99: This variable will be static again, once we modify |
| gdb to use the event loop as the default command loop and we merge |
| event-top.c into this file, top.c */ |
| /* static */ int source_line_number; |
| |
| /* Name of the file we are sourcing. */ |
| /* NOTE 4/29/99: This variable will be static again, once we modify |
| gdb to use the event loop as the default command loop and we merge |
| event-top.c into this file, top.c */ |
| /* static */ char *source_file_name; |
| |
| /* Buffer containing the error_pre_print used by the source stuff. |
| Malloc'd. */ |
| /* NOTE 4/29/99: This variable will be static again, once we modify |
| gdb to use the event loop as the default command loop and we merge |
| event-top.c into this file, top.c */ |
| /* static */ 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. */ |
| /* NOTE 4/29/99: This variable will be static again, once we modify |
| gdb to use the event loop as the default command loop and we merge |
| event-top.c into this file, top.c */ |
| /* static */ 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 */ |
| |
| /* The signal handling mechanism is different depending whether or |
| not the async version is run. NOTE: in the future we plan to make |
| the event loop be the default engine of gdb, and this difference |
| will disappear. */ |
| if (async_hook) |
| async_init_signals (); |
| else |
| 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 */ |
| /* NOTE 4/29/99: This function will be static again, once we modify |
| gdb to use the event loop as the default command loop and we merge |
| event-top.c into this file, top.c */ |
| /* static */ 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; |
| /* NOTE 4/29/99: This variable will be static again, once we modify |
| gdb to use the event loop as the default command loop and we merge |
| event-top.c into this file, top.c */ |
| /* static */ int history_expansion_p; |
| static int write_history_p; |
| static int history_size; |
| static char *history_filename; |
| |
| /* readline uses the word breaks for two things: |
| (1) In figuring out where to point the TEXT parameter to the |
| rl_completion_entry_function. Since we don't use TEXT for much, |
| it doesn't matter a lot what the word breaks are for this purpose, but |
| it does affect how much stuff M-? lists. |
| (2) If one of the matches contains a word break character, readline |
| will quote it. That's why we switch between |
| gdb_completer_word_break_characters and |
| gdb_completer_command_word_break_characters. I'm not sure when |
| we need this behavior (perhaps for funky characters in C++ symbols?). */ |
| |
| /* Variables which are necessary for fancy command line editing. */ |
| char *gdb_completer_word_break_characters = |
| " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,-"; |
| |
| /* When completing on command names, we remove '-' from the list of |
| word break characters, since we use it in command names. If the |
| readline library sees one in any of the current completion strings, |
| it thinks that the string needs to be quoted and automatically supplies |
| a leading quote. */ |
| char *gdb_completer_command_word_break_characters = |
| " \t\n!@#$%^&*()+=|~`}{[]\"';:?/>.<,"; |
| |
| /* 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; |
| |
| control_level = 0; |
| 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); |
| |
| 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; |
| maintenancelist = NULL; |
| maintenanceinfolist = NULL; |
| maintenanceprintlist = NULL; |
| setprintlist = NULL; |
| showprintlist = NULL; |
| setchecklist = NULL; |
| showchecklist = NULL; |
| } |
| |
| /* Init the history buffer. Note that we are called after the init file(s) |
| * have been read so that the user can change the history file via his |
| * .gdbinit file (for instance). The GDBHISTFILE environment variable |
| * 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; |
| |
| /* from event-top.c */ |
| extern int async_command_editing_p; |
| extern struct prompts the_prompts; |
| extern char *async_annotation_suffix; |
| extern char *new_async_prompt; |
| |
| /* If we are running the asynchronous version, |
| we initialize the prompts differently. */ |
| if (!async_hook) |
| { |
| #ifdef DEFAULT_PROMPT |
| prompt = savestring (DEFAULT_PROMPT, strlen(DEFAULT_PROMPT)); |
| #else |
| prompt = savestring ("(gdb) ", 6); |
| #endif |
| } |
| else |
| { |
| /* initialize the prompt stack to a simple "(gdb) " prompt or to |
| whatever the DEFULAT_PROMPT is. */ |
| the_prompts.top = 0; |
| PREFIX(0) = ""; |
| #ifdef DEFAULT_PROMPT |
| PROMPT(0) = savestring (DEFAULT_PROMPT, strlen(DEFAULT_PROMPT)); |
| #else |
| PROMPT(0) = savestring ("(gdb) ", 6); |
| #endif |
| SUFFIX(0) = ""; |
| /* Set things up for annotation_level > 1, if the user ever decides |
| to use it. */ |
| async_annotation_suffix = "prompt"; |
| /* Set the variable associated with the setshow prompt command. */ |
| new_async_prompt = savestring (PROMPT (0), strlen (PROMPT (0))); |
| } |
| |
| /* Set the important stuff up for command editing. */ |
| command_editing_p = 1; |
| async_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; |
| |
| /* The set prompt command is different depending whether or not the |
| async version is run. NOTE: this difference is going to |
| disappear as we make the event loop be the default engine of |
| gdb. */ |
| if (!async_hook) |
| { |
| add_show_from_set |
| (add_set_cmd ("prompt", class_support, var_string, (char *)&prompt, |
| "Set gdb's prompt", |
| &setlist), |
| &showlist); |
| } |
| else |
| { |
| c = add_set_cmd ("prompt", class_support, var_string, |
| (char *)&new_async_prompt, |
| "Set gdb's prompt", |
| &setlist); |
| add_show_from_set (c, &showlist); |
| c->function.sfunc = set_async_prompt; |
| } |
| |
| add_com ("echo", class_support, echo_command, |
| "Print a constant string. Give string as argument.\n\ |
| C escape sequences may be used in the argument.\n\ |
| No newline is added at the end of the argument;\n\ |
| use \"\\n\" if you want a newline to be printed.\n\ |
| Since leading and trailing whitespace are ignored in command arguments,\n\ |
| if you want to print some you must use \"\\\" before leading whitespace\n\ |
| to be printed or after trailing whitespace."); |
| add_com ("document", class_support, document_command, |
| "Document a user-defined command.\n\ |
| Give command name as argument. Give documentation on following lines.\n\ |
| End with a line of just \"end\"."); |
| add_com ("define", class_support, define_command, |
| "Define a new command name. Command name is argument.\n\ |
| Definition appears on following lines, one command per line.\n\ |
| End with a line of just \"end\".\n\ |
| Use the \"document\" command to give documentation for the new command.\n\ |
| Commands defined in this way may have up to ten arguments."); |
| |
| #ifdef __STDC__ |
| c = add_cmd ("source", class_support, source_command, |
| "Read commands from a file named FILE.\n\ |
| Note that the file \"" GDBINIT_FILENAME "\" is read automatically in this way\n\ |
| when gdb is started.", &cmdlist); |
| #else |
| /* Punt file name, we can't help it easily. */ |
| c = add_cmd ("source", class_support, source_command, |
| "Read commands from a file named FILE.\n\ |
| Note that the file \".gdbinit\" is read automatically in this way\n\ |
| when gdb is started.", &cmdlist); |
| #endif |
| c->completer = filename_completer; |
| |
| add_com ("quit", class_support, quit_command, "Exit gdb."); |
| add_com ("help", class_support, help_command, "Print list of commands."); |
| add_com_alias ("q", "quit", class_support, 1); |
| add_com_alias ("h", "help", class_support, 1); |
| |
| add_com ("dont-repeat", class_support, dont_repeat_command, "Don't repeat this command.\n\ |
| Primarily used inside of user-defined commands that should not be repeated when\n\ |
| hitting return."); |
| |
| c = add_set_cmd ("verbose", class_support, var_boolean, (char *)&info_verbose, |
| "Set ", |
| &setlist), |
| add_show_from_set (c, &showlist); |
| c->function.sfunc = set_verbose; |
| set_verbose (NULL, 0, c); |
| |
| /* The set editing command is different depending whether or not the |
| async version is run. NOTE: this difference is going to disappear |
| as we make the event loop be the default engine of gdb. */ |
| if (!async_hook) |
| { |
| 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); |
| } |
| else |
| { |
| c = add_set_cmd ("editing", class_support, var_boolean, (char *)&async_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); |
| |
| add_show_from_set (c, &showlist); |
| c->function.sfunc = set_async_editing_command; |
| } |
| |
| add_prefix_cmd ("history", class_support, set_history, |
| "Generic command for setting command history parameters.", |
| &sethistlist, "set history ", 0, &setlist); |
| add_prefix_cmd ("history", class_support, show_history, |
| "Generic command for showing command history parameters.", |
| &showhistlist, "show history ", 0, &showlist); |
| |
| add_show_from_set |
| (add_set_cmd ("expansion", no_class, var_boolean, (char *)&history_expansion_p, |
| "Set history expansion on command input.\n\ |
| Without an argument, history expansion is enabled.", &sethistlist), |
| &showhistlist); |
| |
| add_show_from_set |
| (add_set_cmd ("save", no_class, var_boolean, (char *)&write_history_p, |
| "Set saving of the history record on exit.\n\ |
| 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); |
| |
| /* The set annotate command is different depending whether or not |
| the async version is run. NOTE: this difference is going to |
| disappear as we make the event loop be the default engine of |
| gdb. */ |
| if (!async_hook) |
| { |
| 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); |
| } |
| else |
| { |
| 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); |
| add_show_from_set (c, &showlist); |
| c->function.sfunc = set_async_annotation_level; |
| } |
| } |