| /* Top level stuff for GDB, the GNU debugger. |
| |
| Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, |
| 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 |
| 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 "cli/cli-cmds.h" |
| #include "cli/cli-script.h" |
| #include "cli/cli-setshow.h" |
| #include "cli/cli-decode.h" |
| #include "symtab.h" |
| #include "inferior.h" |
| #include <signal.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 "completer.h" |
| #include "top.h" |
| #include "version.h" |
| #include "serial.h" |
| #include "doublest.h" |
| #include "gdb_assert.h" |
| |
| /* readline include files */ |
| #include <readline/readline.h> |
| #include <readline/history.h> |
| |
| /* readline defines this. */ |
| #undef savestring |
| |
| #include <sys/types.h> |
| |
| #include <setjmp.h> |
| |
| #include "event-top.h" |
| #include "gdb_string.h" |
| #include "gdb_stat.h" |
| #include <ctype.h> |
| #include "ui-out.h" |
| #include "cli-out.h" |
| |
| /* Default command line prompt. This is overriden in some configs. */ |
| |
| #ifndef DEFAULT_PROMPT |
| #define DEFAULT_PROMPT "(gdb) " |
| #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 = 0; |
| |
| 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. */ |
| |
| /* 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) (FILE *, char *); |
| |
| int epoch_interface; |
| int xgdb_verbose; |
| |
| /* gdb prints this when reading a command interactively */ |
| static char *gdb_prompt_string; /* the global prompt string */ |
| |
| /* 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, commands |
| 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. */ |
| |
| /* The default value has been changed many times over the years. It |
| was originally 5 seconds. But that was thought to be a long time |
| to sit and wait, so it was changed to 2 seconds. That was thought |
| to be plenty unless the connection was going through some terminal |
| server or multiplexer or other form of hairy serial connection. |
| |
| In mid-1996, remote_timeout was moved from remote.c to top.c and |
| it began being used in other remote-* targets. It appears that the |
| default was changed to 20 seconds at that time, perhaps because the |
| Hitachi E7000 ICE didn't always respond in a timely manner. |
| |
| But if 5 seconds is a long time to sit and wait for retransmissions, |
| 20 seconds is far worse. This demonstrates the difficulty of using |
| a single variable for all protocol timeouts. |
| |
| As remote.c is used much more than remote-e7000.c, it was changed |
| back to 2 seconds in 1999. */ |
| |
| int remote_timeout = 2; |
| |
| /* Non-zero tells remote* modules to output debugging info. */ |
| |
| int remote_debug = 0; |
| |
| /* Non-zero means the target is running. Note: this is different from |
| saying that there is an active target and we are stopped at a |
| breakpoint, for instance. This is a real indicator whether the |
| target is off and running, which gdb is doing something else. */ |
| int target_executing = 0; |
| |
| /* Level of control structure. */ |
| static int control_level; |
| |
| /* 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 (int); |
| #endif |
| #endif |
| |
| /* Hooks for alternate command interfaces. */ |
| |
| /* Called after most modules have been initialized, but before taking users |
| command file. |
| |
| If the UI fails to initialize and it wants GDB to continue |
| using the default UI, then it should clear this hook before returning. */ |
| |
| void (*init_ui_hook) (char *argv0); |
| |
| /* 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) (int); |
| |
| /* Called instead of command_loop at top level. Can be invoked via |
| throw_exception(). */ |
| |
| void (*command_loop_hook) (void); |
| |
| |
| /* Called from print_frame_info to list the line we stopped in. */ |
| |
| void (*print_frame_info_listing_hook) (struct symtab * s, int line, |
| int stopline, int noerror); |
| /* Replaces most of query. */ |
| |
| int (*query_hook) (const char *, va_list); |
| |
| /* Replaces most of warning. */ |
| |
| void (*warning_hook) (const char *, va_list); |
| |
| /* 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) (char *, ...); |
| char *(*readline_hook) (char *); |
| void (*readline_end_hook) (void); |
| |
| /* Called as appropriate to notify the interface of the specified breakpoint |
| conditions. */ |
| |
| void (*create_breakpoint_hook) (struct breakpoint * bpt); |
| void (*delete_breakpoint_hook) (struct breakpoint * bpt); |
| void (*modify_breakpoint_hook) (struct breakpoint * bpt); |
| |
| /* Called as appropriate to notify the interface that we have attached |
| to or detached from an already running process. */ |
| |
| void (*attach_hook) (void); |
| void (*detach_hook) (void); |
| |
| /* Called during long calculations to allow GUI to repair window damage, and to |
| check for stop buttons, etc... */ |
| |
| void (*interactive_hook) (void); |
| |
| /* Called when the registers have changed, as a hint to a GUI |
| to minimize window update. */ |
| |
| void (*registers_changed_hook) (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) (int regno); |
| |
| /* Tell the GUI someone changed LEN bytes of memory at ADDR */ |
| void (*memory_changed_hook) (CORE_ADDR addr, int len); |
| |
| /* Called when going to wait for the target. Usually allows the GUI to run |
| while waiting for target events. */ |
| |
| ptid_t (*target_wait_hook) (ptid_t ptid, |
| struct target_waitstatus * status); |
| |
| /* Used by UI as a wrapper around command execution. May do various things |
| like enabling/disabling buttons, etc... */ |
| |
| void (*call_command_hook) (struct cmd_list_element * c, char *cmd, |
| int from_tty); |
| |
| /* Called after a `set' command has finished. Is only run if the |
| `set' command succeeded. */ |
| |
| void (*set_hook) (struct cmd_list_element * c); |
| |
| /* Called when the current thread changes. Argument is thread id. */ |
| |
| void (*context_hook) (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) (void) ATTR_NORETURN; |
| |
| |
| /* One should use catch_errors rather than manipulating these |
| directly. */ |
| #if defined(HAVE_SIGSETJMP) |
| #define SIGJMP_BUF sigjmp_buf |
| #define SIGSETJMP(buf) sigsetjmp((buf), 1) |
| #define SIGLONGJMP(buf,val) siglongjmp((buf), (val)) |
| #else |
| #define SIGJMP_BUF jmp_buf |
| #define SIGSETJMP(buf) setjmp(buf) |
| #define SIGLONGJMP(buf,val) longjmp((buf), (val)) |
| #endif |
| |
| /* Where to go for throw_exception(). */ |
| static SIGJMP_BUF *catch_return; |
| |
| /* Return for reason REASON to the nearest containing catch_errors(). */ |
| |
| NORETURN void |
| throw_exception (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 (event_loop_p && target_can_async_p () && !target_executing) |
| do_exec_cleanups (ALL_CLEANUPS); |
| if (event_loop_p && sync_execution) |
| do_exec_error_cleanups (ALL_CLEANUPS); |
| |
| if (annotation_level > 1) |
| switch (reason) |
| { |
| case RETURN_QUIT: |
| annotate_quit (); |
| break; |
| case RETURN_ERROR: |
| annotate_error (); |
| break; |
| } |
| |
| /* Jump to the containing catch_errors() call, communicating REASON |
| to that call via setjmp's return value. Note that REASON can't |
| be zero, by definition in defs.h. */ |
| |
| (NORETURN void) SIGLONGJMP (*catch_return, (int) reason); |
| } |
| |
| /* Call FUNC() with args FUNC_UIOUT and FUNC_ARGS, catching any |
| errors. Set FUNC_CAUGHT to an ``enum return_reason'' if the |
| function is aborted (using throw_exception() or zero if the |
| function returns normally. Set FUNC_VAL to the value returned by |
| the function or 0 if the function was aborted. |
| |
| Must not be called with immediate_quit in effect (bad things might |
| happen, say we got a signal in the middle of a memcpy to quit_return). |
| 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. */ |
| |
| /* MAYBE: cagney/1999-11-05: catch_errors() in conjunction with |
| error() et.al. could maintain a set of flags that indicate the the |
| current state of each of the longjmp buffers. This would give the |
| longjmp code the chance to detect a longjmp botch (before it gets |
| to longjmperror()). Prior to 1999-11-05 this wasn't possible as |
| code also randomly used a SET_TOP_LEVEL macro that directly |
| initialize the longjmp buffers. */ |
| |
| /* MAYBE: cagney/1999-11-05: Should the catch_errors and cleanups code |
| be consolidated into a single file instead of being distributed |
| between utils.c and top.c? */ |
| |
| static void |
| catcher (catch_exceptions_ftype *func, |
| struct ui_out *func_uiout, |
| void *func_args, |
| int *func_val, |
| enum return_reason *func_caught, |
| char *errstring, |
| return_mask mask) |
| { |
| SIGJMP_BUF *saved_catch; |
| SIGJMP_BUF catch; |
| struct cleanup *saved_cleanup_chain; |
| char *saved_error_pre_print; |
| char *saved_quit_pre_print; |
| struct ui_out *saved_uiout; |
| |
| /* Return value from SIGSETJMP(): enum return_reason if error or |
| quit caught, 0 otherwise. */ |
| int caught; |
| |
| /* Return value from FUNC(): Hopefully non-zero. Explicitly set to |
| zero if an error quit was caught. */ |
| int val; |
| |
| /* Override error/quit messages during FUNC. */ |
| |
| saved_error_pre_print = error_pre_print; |
| saved_quit_pre_print = quit_pre_print; |
| |
| if (mask & RETURN_MASK_ERROR) |
| error_pre_print = errstring; |
| if (mask & RETURN_MASK_QUIT) |
| quit_pre_print = errstring; |
| |
| /* Override the global ``struct ui_out'' builder. */ |
| |
| saved_uiout = uiout; |
| uiout = func_uiout; |
| |
| /* Prevent error/quit during FUNC from calling cleanups established |
| prior to here. */ |
| |
| saved_cleanup_chain = save_cleanups (); |
| |
| /* Call FUNC, catching error/quit events. */ |
| |
| saved_catch = catch_return; |
| catch_return = &catch; |
| caught = SIGSETJMP (catch); |
| if (!caught) |
| val = (*func) (func_uiout, func_args); |
| else |
| val = 0; |
| catch_return = saved_catch; |
| |
| /* FIXME: cagney/1999-11-05: A correct FUNC implementation will |
| clean things up (restoring the cleanup chain) to the state they |
| were just prior to the call. Unfortunately, many FUNC's are not |
| that well behaved. This could be fixed by adding either a |
| do_cleanups call (to cover the problem) or an assertion check to |
| detect bad FUNCs code. */ |
| |
| /* Restore the cleanup chain, the error/quit messages, and the uiout |
| builder, to their original states. */ |
| |
| restore_cleanups (saved_cleanup_chain); |
| |
| uiout = saved_uiout; |
| |
| if (mask & RETURN_MASK_QUIT) |
| quit_pre_print = saved_quit_pre_print; |
| if (mask & RETURN_MASK_ERROR) |
| error_pre_print = saved_error_pre_print; |
| |
| /* Return normally if no error/quit event occurred or this catcher |
| can handle this exception. The caller analyses the func return |
| values. */ |
| |
| if (!caught || (mask & RETURN_MASK (caught))) |
| { |
| *func_val = val; |
| *func_caught = caught; |
| return; |
| } |
| |
| /* The caller didn't request that the event be caught, relay the |
| event to the next containing catch_errors(). */ |
| |
| throw_exception (caught); |
| } |
| |
| int |
| catch_exceptions (struct ui_out *uiout, |
| catch_exceptions_ftype *func, |
| void *func_args, |
| char *errstring, |
| return_mask mask) |
| { |
| int val; |
| enum return_reason caught; |
| catcher (func, uiout, func_args, &val, &caught, errstring, mask); |
| gdb_assert (val >= 0); |
| gdb_assert (caught <= 0); |
| if (caught < 0) |
| return caught; |
| return val; |
| } |
| |
| struct catch_errors_args |
| { |
| catch_errors_ftype *func; |
| void *func_args; |
| }; |
| |
| int |
| do_catch_errors (struct ui_out *uiout, void *data) |
| { |
| struct catch_errors_args *args = data; |
| return args->func (args->func_args); |
| } |
| |
| int |
| catch_errors (catch_errors_ftype *func, void *func_args, char *errstring, |
| return_mask mask) |
| { |
| int val; |
| enum return_reason caught; |
| struct catch_errors_args args; |
| args.func = func; |
| args.func_args = func_args; |
| catcher (do_catch_errors, uiout, &args, &val, &caught, errstring, mask); |
| if (caught != 0) |
| return 0; |
| return val; |
| } |
| |
| struct captured_command_args |
| { |
| catch_command_errors_ftype *command; |
| char *arg; |
| int from_tty; |
| }; |
| |
| static int |
| do_captured_command (void *data) |
| { |
| struct captured_command_args *context = data; |
| context->command (context->arg, context->from_tty); |
| /* FIXME: cagney/1999-11-07: Technically this do_cleanups() call |
| isn't needed. Instead an assertion check could be made that |
| simply confirmed that the called function correctly cleaned up |
| after itself. Unfortunately, old code (prior to 1999-11-04) in |
| main.c was calling SET_TOP_LEVEL(), calling the command function, |
| and then *always* calling do_cleanups(). For the moment we |
| remain ``bug compatible'' with that old code.. */ |
| do_cleanups (ALL_CLEANUPS); |
| return 1; |
| } |
| |
| int |
| catch_command_errors (catch_command_errors_ftype * command, |
| char *arg, int from_tty, return_mask mask) |
| { |
| struct captured_command_args args; |
| args.command = command; |
| args.arg = arg; |
| args.from_tty = from_tty; |
| return catch_errors (do_captured_command, &args, "", mask); |
| } |
| |
| |
| /* Handler for SIGHUP. */ |
| |
| #ifdef SIGHUP |
| /* Just a little helper function for disconnect(). */ |
| |
| /* NOTE 1999-04-29: This function will be static again, once we modify |
| gdb to use the event loop as the default command loop and we merge |
| event-top.c into this file, top.c */ |
| /* static */ int |
| quit_cover (void *s) |
| { |
| caution = 0; /* Throw caution to the wind -- we're exiting. |
| This prevents asking the user dumb questions. */ |
| quit_command ((char *) 0, 0); |
| return 0; |
| } |
| |
| static void |
| disconnect (int signo) |
| { |
| catch_errors (quit_cover, NULL, |
| "Could not kill the program being debugged", RETURN_MASK_ALL); |
| signal (SIGHUP, SIG_DFL); |
| kill (getpid (), SIGHUP); |
| } |
| #endif /* defined SIGHUP */ |
| |
| /* Line number we are currently in in a file which is being sourced. */ |
| /* NOTE 1999-04-29: This variable will be static again, once we modify |
| gdb to use the event loop as the default command loop and we merge |
| event-top.c into this file, top.c */ |
| /* static */ int source_line_number; |
| |
| /* Name of the file we are sourcing. */ |
| /* NOTE 1999-04-29: This variable will be static again, once we modify |
| gdb to use the event loop as the default command loop and we merge |
| event-top.c into this file, top.c */ |
| /* static */ char *source_file_name; |
| |
| /* Buffer containing the error_pre_print used by the source stuff. |
| Malloc'd. */ |
| /* NOTE 1999-04-29: This variable will be static again, once we modify |
| gdb to use the event loop as the default command loop and we merge |
| event-top.c into this file, top.c */ |
| /* static */ 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 1999-04-29: This variable will be static again, once we modify |
| gdb to use the event loop as the default command loop and we merge |
| event-top.c into this file, top.c */ |
| /* static */ char *source_pre_error; |
| |
| /* Clean up on error during a "source" command (or execution of a |
| user-defined command). */ |
| |
| void |
| do_restore_instream_cleanup (void *stream) |
| { |
| /* Restore the previous input stream. */ |
| instream = stream; |
| } |
| |
| /* Read commands from STREAM. */ |
| void |
| read_command_file (FILE *stream) |
| { |
| struct cleanup *cleanups; |
| |
| cleanups = make_cleanup (do_restore_instream_cleanup, instream); |
| instream = stream; |
| command_loop (); |
| do_cleanups (cleanups); |
| } |
| |
| void (*pre_init_ui_hook) (void); |
| |
| #ifdef __MSDOS__ |
| void |
| do_chdir_cleanup (void *old_dir) |
| { |
| chdir (old_dir); |
| xfree (old_dir); |
| } |
| #endif |
| |
| /* Execute the line P as a command. |
| Pass FROM_TTY as second argument to the defining function. */ |
| |
| void |
| execute_command (char *p, int from_tty) |
| { |
| register struct cmd_list_element *c; |
| register enum language flang; |
| static int warned = 0; |
| char *line; |
| |
| free_all_values (); |
| |
| /* Force cleanup of any alloca areas if using C alloca instead of |
| a builtin alloca. */ |
| alloca (0); |
| |
| /* This can happen when command_line_input hits end of file. */ |
| if (p == NULL) |
| return; |
| |
| serial_log_command (p); |
| |
| while (*p == ' ' || *p == '\t') |
| p++; |
| if (*p) |
| { |
| char *arg; |
| line = p; |
| |
| c = lookup_cmd (&p, cmdlist, "", 0, 1); |
| |
| /* If the target is running, we allow only a limited set of |
| commands. */ |
| if (event_loop_p && target_can_async_p () && target_executing) |
| if (!strcmp (c->name, "help") |
| && !strcmp (c->name, "pwd") |
| && !strcmp (c->name, "show") |
| && !strcmp (c->name, "stop")) |
| error ("Cannot execute this command while the target is running."); |
| |
| /* Pass null arg rather than an empty one. */ |
| arg = *p ? p : 0; |
| |
| /* FIXME: cagney/2002-02-02: The c->type test is pretty dodgy |
| while the is_complete_command(cfunc) test is just plain |
| bogus. They should both be replaced by a test of the form |
| c->strip_trailing_white_space_p. */ |
| /* NOTE: cagney/2002-02-02: The function.cfunc in the below |
| can't be replaced with func. This is because it is the |
| cfunc, and not the func, that has the value that the |
| is_complete_command hack is testing for. */ |
| /* Clear off trailing whitespace, except for set and complete |
| command. */ |
| if (arg |
| && c->type != set_cmd |
| && !is_complete_command (c)) |
| { |
| p = arg + strlen (arg) - 1; |
| while (p >= arg && (*p == ' ' || *p == '\t')) |
| p--; |
| *(p + 1) = '\0'; |
| } |
| |
| /* If this command has been pre-hooked, run the hook first. */ |
| execute_cmd_pre_hook (c); |
| |
| if (c->flags & DEPRECATED_WARN_USER) |
| deprecated_cmd_warning (&line); |
| |
| if (c->class == class_user) |
| execute_user_command (c, arg); |
| else if (c->type == set_cmd || c->type == show_cmd) |
| do_setshow_command (arg, from_tty & caution, c); |
| else if (!cmd_func_p (c)) |
| error ("That is not a command, just a help topic."); |
| else if (call_command_hook) |
| call_command_hook (c, arg, from_tty & caution); |
| else |
| cmd_func (c, arg, from_tty & caution); |
| |
| /* If this command has been post-hooked, run the hook last. */ |
| execute_cmd_post_hook (c); |
| |
| } |
| |
| /* Tell the user if the language has changed (except first time). */ |
| if (current_language != expected_language) |
| { |
| if (language_mode == language_mode_auto) |
| { |
| language_info (1); /* Print what changed. */ |
| } |
| warned = 0; |
| } |
| |
| /* Warn the user if the working language does not match the |
| language of the current frame. Only warn the user if we are |
| actually running the program, i.e. there is a stack. */ |
| /* FIXME: This should be cacheing the frame and only running when |
| the frame changes. */ |
| |
| if (target_has_stack) |
| { |
| flang = get_frame_language (); |
| if (!warned |
| && flang != language_unknown |
| && flang != current_language->la_language) |
| { |
| printf_filtered ("%s\n", lang_frame_mismatch_warn); |
| warned = 1; |
| } |
| } |
| } |
| |
| /* Read commands from `instream' and execute them |
| until end of file or error reading instream. */ |
| |
| void |
| command_loop (void) |
| { |
| struct cleanup *old_chain; |
| char *command; |
| int stdin_is_tty = ISATTY (stdin); |
| long time_at_cmd_start; |
| #ifdef HAVE_SBRK |
| long space_at_cmd_start = 0; |
| #endif |
| extern int display_time; |
| extern int display_space; |
| |
| while (instream && !feof (instream)) |
| { |
| if (window_hook && instream == stdin) |
| (*window_hook) (instream, get_prompt ()); |
| |
| quit_flag = 0; |
| if (instream == stdin && stdin_is_tty) |
| reinitialize_more_filter (); |
| old_chain = make_cleanup (null_cleanup, 0); |
| |
| /* Get a command-line. This calls the readline package. */ |
| command = command_line_input (instream == stdin ? |
| get_prompt () : (char *) NULL, |
| instream == stdin, "prompt"); |
| if (command == 0) |
| return; |
| |
| time_at_cmd_start = get_run_time (); |
| |
| if (display_space) |
| { |
| #ifdef HAVE_SBRK |
| extern char **environ; |
| char *lim = (char *) sbrk (0); |
| |
| space_at_cmd_start = (long) (lim - (char *) &environ); |
| #endif |
| } |
| |
| execute_command (command, instream == stdin); |
| /* Do any commands attached to breakpoint we stopped at. */ |
| bpstat_do_actions (&stop_bpstat); |
| do_cleanups (old_chain); |
| |
| if (display_time) |
| { |
| long cmd_time = get_run_time () - time_at_cmd_start; |
| |
| printf_unfiltered ("Command execution time: %ld.%06ld\n", |
| cmd_time / 1000000, cmd_time % 1000000); |
| } |
| |
| if (display_space) |
| { |
| #ifdef HAVE_SBRK |
| extern char **environ; |
| char *lim = (char *) sbrk (0); |
| long space_now = lim - (char *) &environ; |
| long space_diff = space_now - space_at_cmd_start; |
| |
| printf_unfiltered ("Space used: %ld (%c%ld for this command)\n", |
| space_now, |
| (space_diff >= 0 ? '+' : '-'), |
| space_diff); |
| #endif |
| } |
| } |
| } |
| |
| /* Read commands from `instream' and execute them until end of file or |
| error reading instream. This command loop doesnt care about any |
| such things as displaying time and space usage. If the user asks |
| for those, they won't work. */ |
| void |
| simplified_command_loop (char *(*read_input_func) (char *), |
| void (*execute_command_func) (char *, int)) |
| { |
| struct cleanup *old_chain; |
| char *command; |
| int stdin_is_tty = ISATTY (stdin); |
| |
| while (instream && !feof (instream)) |
| { |
| quit_flag = 0; |
| if (instream == stdin && stdin_is_tty) |
| reinitialize_more_filter (); |
| old_chain = make_cleanup (null_cleanup, 0); |
| |
| /* Get a command-line. */ |
| command = (*read_input_func) (instream == stdin ? |
| get_prompt () : (char *) NULL); |
| |
| if (command == 0) |
| return; |
| |
| (*execute_command_func) (command, instream == stdin); |
| |
| /* Do any commands attached to breakpoint we stopped at. */ |
| bpstat_do_actions (&stop_bpstat); |
| |
| do_cleanups (old_chain); |
| } |
| } |
| |
| /* Commands call this if they do not want to be repeated by null lines. */ |
| |
| void |
| dont_repeat (void) |
| { |
| if (server_command) |
| return; |
| |
| /* If we aren't reading from standard input, we are saving the last |
| thing read from stdin in line and don't want to delete it. Null lines |
| won't repeat here in any case. */ |
| if (instream == stdin) |
| *line = 0; |
| } |
| |
| /* Read a line from the stream "instream" without command line editing. |
| |
| It prints PROMPT_ARG once at the start. |
| Action is compatible with "readline", e.g. space for the result is |
| malloc'd and should be freed by the caller. |
| |
| A NULL return means end of file. */ |
| char * |
| gdb_readline (char *prompt_arg) |
| { |
| int c; |
| char *result; |
| int input_index = 0; |
| int result_size = 80; |
| |
| if (prompt_arg) |
| { |
| /* Don't use a _filtered function here. It causes the assumed |
| character position to be off, since the newline we read from |
| the user is not accounted for. */ |
| fputs_unfiltered (prompt_arg, gdb_stdout); |
| 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; |
| xfree (result); |
| return NULL; |
| } |
| |
| if (c == '\n') |
| #ifndef CRLF_SOURCE_FILES |
| break; |
| #else |
| { |
| if (input_index > 0 && result[input_index - 1] == '\r') |
| input_index--; |
| break; |
| } |
| #endif |
| |
| result[input_index++] = c; |
| while (input_index >= result_size) |
| { |
| result_size *= 2; |
| result = (char *) xrealloc (result, result_size); |
| } |
| } |
| |
| result[input_index++] = '\0'; |
| return result; |
| } |
| |
| /* Variables which control command line editing and history |
| substitution. These variables are given default values at the end |
| of this file. */ |
| static int command_editing_p; |
| /* NOTE 1999-04-29: This variable will be static again, once we modify |
| gdb to use the event loop as the default command loop and we merge |
| event-top.c into this file, top.c */ |
| /* static */ int history_expansion_p; |
| static int write_history_p; |
| static int history_size; |
| static char *history_filename; |
| |
| /* This is like readline(), but it has some gdb-specific behavior. |
| gdb can use readline in both the synchronous and async modes during |
| a single gdb invocation. At the ordinary top-level prompt we might |
| be using the async readline. That means we can't use |
| rl_pre_input_hook, since it doesn't work properly in async mode. |
| However, for a secondary prompt (" >", such as occurs during a |
| `define'), gdb just calls readline() directly, running it in |
| synchronous mode. So for operate-and-get-next to work in this |
| situation, we have to switch the hooks around. That is what |
| gdb_readline_wrapper is for. */ |
| char * |
| gdb_readline_wrapper (char *prompt) |
| { |
| /* Set the hook that works in this case. */ |
| if (event_loop_p && after_char_processing_hook) |
| { |
| rl_pre_input_hook = (Function *) after_char_processing_hook; |
| after_char_processing_hook = NULL; |
| } |
| |
| return readline (prompt); |
| } |
| |
| |
| #ifdef STOP_SIGNAL |
| static void |
| stop_sig (int signo) |
| { |
| #if STOP_SIGNAL == SIGTSTP |
| signal (SIGTSTP, SIG_DFL); |
| #if HAVE_SIGPROCMASK |
| { |
| sigset_t zero; |
| |
| sigemptyset (&zero); |
| sigprocmask (SIG_SETMASK, &zero, 0); |
| } |
| #elif HAVE_SIGSETMASK |
| sigsetmask (0); |
| #endif |
| kill (getpid (), SIGTSTP); |
| signal (SIGTSTP, stop_sig); |
| #else |
| signal (STOP_SIGNAL, stop_sig); |
| #endif |
| printf_unfiltered ("%s", get_prompt ()); |
| gdb_flush (gdb_stdout); |
| |
| /* Forget about any previous command -- null line now will do nothing. */ |
| dont_repeat (); |
| } |
| #endif /* STOP_SIGNAL */ |
| |
| /* Initialize signal handlers. */ |
| static void |
| float_handler (int signo) |
| { |
| /* This message is based on ANSI C, section 4.7. Note that integer |
| divide by zero causes this, so "float" is a misnomer. */ |
| signal (SIGFPE, float_handler); |
| error ("Erroneous arithmetic operation."); |
| } |
| |
| static void |
| do_nothing (int signo) |
| { |
| /* Under System V the default disposition of a signal is reinstated after |
| the signal is caught and delivered to an application process. On such |
| systems one must restore the replacement signal handler if one wishes |
| to continue handling the signal in one's program. On BSD systems this |
| is not needed but it is harmless, and it simplifies the code to just do |
| it unconditionally. */ |
| signal (signo, do_nothing); |
| } |
| |
| static void |
| init_signals (void) |
| { |
| signal (SIGINT, request_quit); |
| |
| /* If SIGTRAP was set to SIG_IGN, then the SIG_IGN will get passed |
| to the inferior and breakpoints will be ignored. */ |
| #ifdef SIGTRAP |
| signal (SIGTRAP, SIG_DFL); |
| #endif |
| |
| /* If we initialize SIGQUIT to SIG_IGN, then the SIG_IGN will get |
| passed to the inferior, which we don't want. It would be |
| possible to do a "signal (SIGQUIT, SIG_DFL)" after we fork, but |
| on BSD4.3 systems using vfork, that can affect the |
| GDB process as well as the inferior (the signal handling tables |
| might be in memory, shared between the two). Since we establish |
| a handler for SIGQUIT, when we call exec it will set the signal |
| to SIG_DFL for us. */ |
| signal (SIGQUIT, do_nothing); |
| #ifdef SIGHUP |
| if (signal (SIGHUP, do_nothing) != SIG_IGN) |
| signal (SIGHUP, disconnect); |
| #endif |
| signal (SIGFPE, float_handler); |
| |
| #if defined(SIGWINCH) && defined(SIGWINCH_HANDLER) |
| signal (SIGWINCH, SIGWINCH_HANDLER); |
| #endif |
| } |
| |
| /* The current saved history number from operate-and-get-next. |
| This is -1 if not valid. */ |
| static int operate_saved_history = -1; |
| |
| /* This is put on the appropriate hook and helps operate-and-get-next |
| do its work. */ |
| void |
| gdb_rl_operate_and_get_next_completion (void) |
| { |
| int delta = where_history () - operate_saved_history; |
| /* The `key' argument to rl_get_previous_history is ignored. */ |
| rl_get_previous_history (delta, 0); |
| operate_saved_history = -1; |
| |
| /* readline doesn't automatically update the display for us. */ |
| rl_redisplay (); |
| |
| after_char_processing_hook = NULL; |
| rl_pre_input_hook = NULL; |
| } |
| |
| /* This is a gdb-local readline command handler. It accepts the |
| current command line (like RET does) and, if this command was taken |
| from the history, arranges for the next command in the history to |
| appear on the command line when the prompt returns. |
| We ignore the arguments. */ |
| static int |
| gdb_rl_operate_and_get_next (int count, int key) |
| { |
| int where; |
| |
| if (event_loop_p) |
| { |
| /* Use the async hook. */ |
| after_char_processing_hook = gdb_rl_operate_and_get_next_completion; |
| } |
| else |
| { |
| /* This hook only works correctly when we are using the |
| synchronous readline. */ |
| rl_pre_input_hook = (Function *) gdb_rl_operate_and_get_next_completion; |
| } |
| |
| /* Find the current line, and find the next line to use. */ |
| where = where_history(); |
| |
| /* FIXME: kettenis/20020817: max_input_history is renamed into |
| history_max_entries in readline-4.2. When we do a new readline |
| import, we should probably change it here too, even though |
| readline maintains backwards compatibility for now by still |
| defining max_input_history. */ |
| if ((history_is_stifled () && (history_length >= max_input_history)) || |
| (where >= history_length - 1)) |
| operate_saved_history = where; |
| else |
| operate_saved_history = where + 1; |
| |
| return rl_newline (1, key); |
| } |
| |
| /* Read one line from the command input stream `instream' |
| into the local static buffer `linebuffer' (whose current length |
| is `linelength'). |
| The buffer is made bigger as necessary. |
| Returns the address of the start of the line. |
| |
| NULL is returned for end of file. |
| |
| *If* the instream == stdin & stdin is a terminal, the line read |
| is copied into the file line saver (global var char *line, |
| length linesize) so that it can be duplicated. |
| |
| This routine either uses fancy command line editing or |
| simple input as the user has requested. */ |
| |
| char * |
| command_line_input (char *prompt_arg, int repeat, char *annotation_suffix) |
| { |
| static char *linebuffer = 0; |
| static unsigned linelength = 0; |
| register char *p; |
| char *p1; |
| char *rl; |
| char *local_prompt = prompt_arg; |
| char *nline; |
| char got_eof = 0; |
| |
| /* The annotation suffix must be non-NULL. */ |
| if (annotation_suffix == NULL) |
| annotation_suffix = ""; |
| |
| if (annotation_level > 1 && instream == stdin) |
| { |
| local_prompt = alloca ((prompt_arg == NULL ? 0 : strlen (prompt_arg)) |
| + strlen (annotation_suffix) + 40); |
| if (prompt_arg == NULL) |
| local_prompt[0] = '\0'; |
| else |
| strcpy (local_prompt, prompt_arg); |
| strcat (local_prompt, "\n\032\032"); |
| strcat (local_prompt, annotation_suffix); |
| strcat (local_prompt, "\n"); |
| } |
| |
| if (linebuffer == 0) |
| { |
| linelength = 80; |
| linebuffer = (char *) xmalloc (linelength); |
| } |
| |
| p = linebuffer; |
| |
| /* Control-C quits instantly if typed while in this loop |
| since it should not wait until the user types a newline. */ |
| immediate_quit++; |
| #ifdef STOP_SIGNAL |
| if (job_control) |
| { |
| if (event_loop_p) |
| signal (STOP_SIGNAL, handle_stop_sig); |
| else |
| signal (STOP_SIGNAL, stop_sig); |
| } |
| #endif |
| |
| while (1) |
| { |
| /* Make sure that all output has been output. Some machines may let |
| you get away with leaving out some of the gdb_flush, but not all. */ |
| wrap_here (""); |
| gdb_flush (gdb_stdout); |
| gdb_flush (gdb_stderr); |
| |
| if (source_file_name != NULL) |
| { |
| ++source_line_number; |
| sprintf (source_error, |
| "%s%s:%d: Error in sourced command file:\n", |
| source_pre_error, |
| source_file_name, |
| source_line_number); |
| error_pre_print = source_error; |
| } |
| |
| if (annotation_level > 1 && instream == stdin) |
| { |
| printf_unfiltered ("\n\032\032pre-"); |
| printf_unfiltered (annotation_suffix); |
| printf_unfiltered ("\n"); |
| } |
| |
| /* Don't use fancy stuff if not talking to stdin. */ |
| if (readline_hook && instream == NULL) |
| { |
| rl = (*readline_hook) (local_prompt); |
| } |
| else if (command_editing_p && instream == stdin && ISATTY (instream)) |
| { |
| rl = gdb_readline_wrapper (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++; |
| |
| xfree (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) |
| { |
| xfree (history_value); |
| return command_line_input (prompt_arg, repeat, annotation_suffix); |
| } |
| if (strlen (history_value) > linelength) |
| { |
| linelength = strlen (history_value) + 1; |
| linebuffer = (char *) xrealloc (linebuffer, linelength); |
| } |
| strcpy (linebuffer, history_value); |
| p = linebuffer + strlen (linebuffer); |
| xfree (history_value); |
| } |
| } |
| |
| /* 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; |
| } |
| |
| /* Print the GDB banner. */ |
| void |
| print_gdb_version (struct ui_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 2003 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, "\"."); |
| } |
| |
| /* get_prompt: access method for the GDB prompt string. */ |
| |
| #define MAX_PROMPT_SIZE 256 |
| |
| /* |
| * int get_prompt_1 (char * buf); |
| * |
| * Work-horse for get_prompt (called via catch_errors). |
| * Argument is buffer to hold the formatted prompt. |
| * |
| * Returns: 1 for success (use formatted prompt) |
| * 0 for failure (use gdb_prompt_string). |
| */ |
| |
| static int gdb_prompt_escape; |
| |
| static int |
| get_prompt_1 (void *data) |
| { |
| char *formatted_prompt = data; |
| char *local_prompt; |
| |
| if (event_loop_p) |
| local_prompt = PROMPT (0); |
| else |
| local_prompt = gdb_prompt_string; |
| |
| |
| if (gdb_prompt_escape == 0) |
| { |
| return 0; /* do no formatting */ |
| } |
| else |
| /* formatted prompt */ |
| { |
| char fmt[40], *promptp, *outp, *tmp; |
| struct value *arg_val; |
| DOUBLEST doubleval; |
| LONGEST longval; |
| CORE_ADDR addrval; |
| |
| int i, len; |
| struct type *arg_type, *elt_type; |
| |
| promptp = local_prompt; |
| outp = formatted_prompt; |
| |
| while (*promptp != '\0') |
| { |
| int available = MAX_PROMPT_SIZE - (outp - formatted_prompt) - 1; |
| |
| if (*promptp != gdb_prompt_escape) |
| { |
| if (available >= 1) /* overflow protect */ |
| *outp++ = *promptp++; |
| } |
| else |
| { |
| /* GDB prompt string contains escape char. Parse for arg. |
| Two consecutive escape chars followed by arg followed by |
| a comma means to insert the arg using a default format. |
| Otherwise a printf format string may be included between |
| the two escape chars. eg: |
| %%foo, insert foo using default format |
| %2.2f%foo, insert foo using "%2.2f" format |
| A mismatch between the format string and the data type |
| of "foo" is an error (which we don't know how to protect |
| against). */ |
| |
| fmt[0] = '\0'; /* assume null format string */ |
| if (promptp[1] == gdb_prompt_escape) /* double esc char */ |
| { |
| promptp += 2; /* skip past two escape chars. */ |
| } |
| else |
| { |
| /* extract format string from between two esc chars */ |
| i = 0; |
| do |
| { |
| fmt[i++] = *promptp++; /* copy format string */ |
| } |
| while (i < sizeof (fmt) - 1 && |
| *promptp != gdb_prompt_escape && |
| *promptp != '\0'); |
| |
| if (*promptp != gdb_prompt_escape) |
| error ("Syntax error at prompt position %d", |
| (int) (promptp - local_prompt)); |
| else |
| { |
| promptp++; /* skip second escape char */ |
| fmt[i++] = '\0'; /* terminate the format string */ |
| } |
| } |
| |
| arg_val = parse_to_comma_and_eval (&promptp); |
| if (*promptp == ',') |
| promptp++; /* skip past the comma */ |
| arg_type = check_typedef (VALUE_TYPE (arg_val)); |
| switch (TYPE_CODE (arg_type)) |
| { |
| case TYPE_CODE_ARRAY: |
| elt_type = check_typedef (TYPE_TARGET_TYPE (arg_type)); |
| if (TYPE_LENGTH (arg_type) > 0 && |
| TYPE_LENGTH (elt_type) == 1 && |
| TYPE_CODE (elt_type) == TYPE_CODE_INT) |
| { |
| int len = TYPE_LENGTH (arg_type); |
| |
| if (VALUE_LAZY (arg_val)) |
| value_fetch_lazy (arg_val); |
| tmp = VALUE_CONTENTS (arg_val); |
| |
| if (len > available) |
| len = available; /* overflow protect */ |
| |
| /* FIXME: how to protect GDB from crashing |
| from bad user-supplied format string? */ |
| if (fmt[0] != 0) |
| sprintf (outp, fmt, tmp); |
| else |
| strncpy (outp, tmp, len); |
| outp[len] = '\0'; |
| } |
| break; |
| case TYPE_CODE_PTR: |
| elt_type = check_typedef (TYPE_TARGET_TYPE (arg_type)); |
| addrval = value_as_address (arg_val); |
| |
| if (TYPE_LENGTH (elt_type) == 1 && |
| TYPE_CODE (elt_type) == TYPE_CODE_INT && |
| addrval != 0) |
| { |
| /* display it as a string */ |
| char *default_fmt = "%s"; |
| char *tmp; |
| int err = 0; |
| |
| /* Limiting the number of bytes that the following call |
| will read protects us from sprintf overflow later. */ |
| i = target_read_string (addrval, /* src */ |
| &tmp, /* dest */ |
| available, /* len */ |
| &err); |
| if (err) /* read failed */ |
| error ("%s on target_read", safe_strerror (err)); |
| |
| tmp[i] = '\0'; /* force-terminate string */ |
| /* FIXME: how to protect GDB from crashing |
| from bad user-supplied format string? */ |
| sprintf (outp, fmt[0] == 0 ? default_fmt : fmt, |
| tmp); |
| xfree (tmp); |
| } |
| else |
| { |
| /* display it as a pointer */ |
| char *default_fmt = "0x%x"; |
| |
| /* FIXME: how to protect GDB from crashing |
| from bad user-supplied format string? */ |
| if (available >= 16 /*? */ ) /* overflow protect */ |
| sprintf (outp, fmt[0] == 0 ? default_fmt : fmt, |
| (long) addrval); |
| } |
| break; |
| case TYPE_CODE_FLT: |
| { |
| char *default_fmt = "%g"; |
| |
| doubleval = value_as_double (arg_val); |
| /* FIXME: how to protect GDB from crashing |
| from bad user-supplied format string? */ |
| if (available >= 16 /*? */ ) /* overflow protect */ |
| sprintf (outp, fmt[0] == 0 ? default_fmt : fmt, |
| (double) doubleval); |
| break; |
| } |
| case TYPE_CODE_INT: |
| { |
| char *default_fmt = "%d"; |
| |
| longval = value_as_long (arg_val); |
| /* FIXME: how to protect GDB from crashing |
| from bad user-supplied format string? */ |
| if (available >= 16 /*? */ ) /* overflow protect */ |
| sprintf (outp, fmt[0] == 0 ? default_fmt : fmt, |
| (long) longval); |
| break; |
| } |
| case TYPE_CODE_BOOL: |
| { |
| /* no default format for bool */ |
| longval = value_as_long (arg_val); |
| if (available >= 8 /*? */ ) /* overflow protect */ |
| { |
| if (longval) |
| strcpy (outp, "<true>"); |
| else |
| strcpy (outp, "<false>"); |
| } |
| break; |
| } |
| case TYPE_CODE_ENUM: |
| { |
| /* no default format for enum */ |
| longval = value_as_long (arg_val); |
| len = TYPE_NFIELDS (arg_type); |
| /* find enum name if possible */ |
| for (i = 0; i < len; i++) |
| if (TYPE_FIELD_BITPOS (arg_type, i) == longval) |
| break; /* match -- end loop */ |
| |
| if (i < len) /* enum name found */ |
| { |
| char *name = TYPE_FIELD_NAME (arg_type, i); |
| |
| strncpy (outp, name, available); |
| /* in casel available < strlen (name), */ |
| outp[available] = '\0'; |
| } |
| else |
| { |
| if (available >= 16 /*? */ ) /* overflow protect */ |
| sprintf (outp, "%ld", (long) longval); |
| } |
| break; |
| } |
| case TYPE_CODE_VOID: |
| *outp = '\0'; |
| break; /* void type -- no output */ |
| default: |
| error ("bad data type at prompt position %d", |
| (int) (promptp - local_prompt)); |
| break; |
| } |
| outp += strlen (outp); |
| } |
| } |
| *outp++ = '\0'; /* terminate prompt string */ |
| return 1; |
| } |
| } |
| |
| char * |
| get_prompt (void) |
| { |
| static char buf[MAX_PROMPT_SIZE]; |
| |
| if (catch_errors (get_prompt_1, buf, "bad formatted prompt: ", |
| RETURN_MASK_ALL)) |
| { |
| return &buf[0]; /* successful formatted prompt */ |
| } |
| else |
| { |
| /* Prompt could not be formatted. */ |
| if (event_loop_p) |
| return PROMPT (0); |
| else |
| return gdb_prompt_string; |
| } |
| } |
| |
| void |
| set_prompt (char *s) |
| { |
| /* ??rehrauer: I don't know why this fails, since it looks as though |
| assignments to prompt are wrapped in calls to savestring... |
| if (prompt != NULL) |
| xfree (prompt); |
| */ |
| if (event_loop_p) |
| PROMPT (0) = savestring (s, strlen (s)); |
| else |
| gdb_prompt_string = 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 (void) |
| { |
| if (! ptid_equal (inferior_ptid, null_ptid) && 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 (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) |
| { |
| struct value *val = parse_and_eval (args); |
| |
| exit_code = (int) value_as_long (val); |
| } |
| |
| if (! ptid_equal (inferior_ptid, null_ptid) && 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 */ |
| |
| exit (exit_code); |
| } |
| |
| /* 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 (void) |
| { |
| return gdb_has_a_terminal () && (instream == stdin) & caution; |
| } |
| |
| /* ARGSUSED */ |
| static void |
| dont_repeat_command (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 |
| void |
| show_commands (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; |
| |
| /* 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_long (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 (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 */ |
| void |
| set_history (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 */ |
| void |
| show_history (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 */ |
| void |
| set_verbose (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."; |
| } |
| } |
| |
| /* 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 (void) |
| { |
| 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. */ |
| #ifdef __MSDOS__ |
| /* No leading dots in file names are allowed on MSDOS. */ |
| history_filename = concat (current_directory, "/_gdb_history", NULL); |
| #else |
| history_filename = concat (current_directory, "/.gdb_history", NULL); |
| #endif |
| } |
| read_history (history_filename); |
| } |
| |
| static void |
| init_main (void) |
| { |
| struct cmd_list_element *c; |
| |
| /* If we are running the asynchronous version, |
| we initialize the prompts differently. */ |
| if (!event_loop_p) |
| { |
| gdb_prompt_string = savestring (DEFAULT_PROMPT, strlen (DEFAULT_PROMPT)); |
| } |
| else |
| { |
| /* initialize the prompt stack to a simple "(gdb) " prompt or to |
| whatever the DEFAULT_PROMPT is. */ |
| the_prompts.top = 0; |
| PREFIX (0) = ""; |
| PROMPT (0) = savestring (DEFAULT_PROMPT, strlen (DEFAULT_PROMPT)); |
| 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))); |
| |
| /* If gdb was started with --annotate=2, this is equivalent to |
| the user entering the command 'set annotate 2' at the gdb |
| prompt, so we need to do extra processing. */ |
| if (annotation_level > 1) |
| set_async_annotation_level (NULL, 0, NULL); |
| } |
| gdb_prompt_escape = 0; /* default to none. */ |
| |
| /* Set the important stuff up for command editing. */ |
| command_editing_p = 1; |
| history_expansion_p = 0; |
| write_history_p = 0; |
| |
| /* Setup important stuff for command line editing. */ |
| rl_completion_entry_function = readline_line_completion_function; |
| rl_completer_word_break_characters = |
| get_gdb_completer_word_break_characters (); |
| rl_completer_quote_characters = get_gdb_completer_quote_characters (); |
| rl_readline_name = "gdb"; |
| rl_terminal_name = getenv ("TERM"); |
| |
| /* The name for this defun comes from Bash, where it originated. |
| 15 is Control-o, the same binding this function has in Bash. */ |
| rl_add_defun ("operate-and-get-next", gdb_rl_operate_and_get_next, 15); |
| |
| /* The set prompt command is different depending whether or not the |
| async version is run. NOTE: this difference is going to |
| disappear as we make the event loop be the default engine of |
| gdb. */ |
| if (!event_loop_p) |
| { |
| add_show_from_set |
| (add_set_cmd ("prompt", class_support, var_string, |
| (char *) &gdb_prompt_string, "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); |
| set_cmd_sfunc (c, set_async_prompt); |
| } |
| |
| add_show_from_set |
| (add_set_cmd ("prompt-escape-char", class_support, var_zinteger, |
| (char *) &gdb_prompt_escape, |
| "Set escape character for formatting of gdb's prompt", |
| &setlist), |
| &showlist); |
| |
| 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."); |
| |
| /* 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 (!event_loop_p) |
| { |
| 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); |
| set_cmd_sfunc (c, set_async_editing_command); |
| } |
| |
| 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); |
| set_cmd_sfunc (c, set_history_size_command); |
| |
| c = add_set_cmd ("filename", no_class, var_filename, |
| (char *) &history_filename, |
| "Set the filename in which to record the command history\n\ |
| (the list of previous commands of which a record is kept).", &sethistlist); |
| set_cmd_completer (c, filename_completer); |
| add_show_from_set (c, &showhistlist); |
| |
| add_show_from_set |
| (add_set_cmd ("confirm", class_support, var_boolean, |
| (char *) &caution, |
| "Set whether to confirm potentially dangerous operations.", |
| &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 (!event_loop_p) |
| { |
| 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); |
| set_cmd_sfunc (c, set_async_annotation_level); |
| } |
| if (event_loop_p) |
| { |
| add_show_from_set |
| (add_set_cmd ("exec-done-display", class_support, var_boolean, (char *) &exec_done_display_p, |
| "Set notification of completion for asynchronous execution commands.\n\ |
| Use \"on\" to enable the notification, and \"off\" to disable it.", &setlist), |
| &showlist); |
| } |
| } |
| |
| void |
| gdb_init (char *argv0) |
| { |
| if (pre_init_ui_hook) |
| pre_init_ui_hook (); |
| |
| /* Run the init function of each source file */ |
| |
| getcwd (gdb_dirbuf, sizeof (gdb_dirbuf)); |
| current_directory = gdb_dirbuf; |
| |
| #ifdef __MSDOS__ |
| /* Make sure we return to the original directory upon exit, come |
| what may, since the OS doesn't do that for us. */ |
| make_final_cleanup (do_chdir_cleanup, xstrdup (current_directory)); |
| #endif |
| |
| init_cmd_lists (); /* This needs to be done first */ |
| initialize_targets (); /* Setup target_terminal macros for utils.c */ |
| initialize_utils (); /* Make errors and warnings possible */ |
| initialize_all_files (); |
| initialize_current_architecture (); |
| init_cli_cmds(); |
| init_main (); /* But that omits this file! Do it now */ |
| |
| /* The signal handling mechanism is different depending whether or |
| not the async version is run. NOTE: in the future we plan to make |
| the event loop be the default engine of gdb, and this difference |
| will disappear. */ |
| if (event_loop_p) |
| async_init_signals (); |
| else |
| init_signals (); |
| |
| /* We need a default language for parsing expressions, so simple things like |
| "set width 0" won't fail if no language is explicitly set in a config file |
| or implicitly set by reading an executable during startup. */ |
| set_language (language_c); |
| expected_language = current_language; /* don't warn about the change. */ |
| |
| /* Allow another UI to initialize. If the UI fails to initialize, and |
| it wants GDB to revert to the CLI, it should clear init_ui_hook. */ |
| if (init_ui_hook) |
| init_ui_hook (argv0); |
| } |