| /* Memory-access and commands for "inferior" process, for GDB. |
| Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, |
| 1996, 1997, 1998, 1999, 2000, 2001, 2002 |
| Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| 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 <signal.h> |
| #include "gdb_string.h" |
| #include "symtab.h" |
| #include "gdbtypes.h" |
| #include "frame.h" |
| #include "inferior.h" |
| #include "environ.h" |
| #include "value.h" |
| #include "gdbcmd.h" |
| #include "symfile.h" |
| #include "gdbcore.h" |
| #include "target.h" |
| #include "language.h" |
| #include "symfile.h" |
| #include "objfiles.h" |
| #include "completer.h" |
| #include "ui-out.h" |
| #include "event-top.h" |
| #include "parser-defs.h" |
| #include "regcache.h" |
| #include "reggroups.h" |
| #include <ctype.h> |
| |
| /* Functions exported for general use, in inferior.h: */ |
| |
| void all_registers_info (char *, int); |
| |
| void registers_info (char *, int); |
| |
| void nexti_command (char *, int); |
| |
| void stepi_command (char *, int); |
| |
| void continue_command (char *, int); |
| |
| void interrupt_target_command (char *args, int from_tty); |
| |
| /* Local functions: */ |
| |
| static void nofp_registers_info (char *, int); |
| |
| static void print_return_value (int struct_return, struct type *value_type); |
| |
| static void finish_command_continuation (struct continuation_arg *); |
| |
| static void until_next_command (int); |
| |
| static void until_command (char *, int); |
| |
| static void path_info (char *, int); |
| |
| static void path_command (char *, int); |
| |
| static void unset_command (char *, int); |
| |
| static void float_info (char *, int); |
| |
| static void detach_command (char *, int); |
| |
| static void unset_environment_command (char *, int); |
| |
| static void set_environment_command (char *, int); |
| |
| static void environment_info (char *, int); |
| |
| static void program_info (char *, int); |
| |
| static void finish_command (char *, int); |
| |
| static void signal_command (char *, int); |
| |
| static void jump_command (char *, int); |
| |
| static void step_1 (int, int, char *); |
| static void step_once (int skip_subroutines, int single_inst, int count); |
| static void step_1_continuation (struct continuation_arg *arg); |
| |
| static void next_command (char *, int); |
| |
| static void step_command (char *, int); |
| |
| static void run_command (char *, int); |
| |
| static void run_no_args_command (char *args, int from_tty); |
| |
| static void go_command (char *line_no, int from_tty); |
| |
| static int strip_bg_char (char **); |
| |
| void _initialize_infcmd (void); |
| |
| #define GO_USAGE "Usage: go <location>\n" |
| |
| static void breakpoint_auto_delete_contents (void *); |
| |
| #define ERROR_NO_INFERIOR \ |
| if (!target_has_execution) error ("The program is not being run."); |
| |
| /* String containing arguments to give to the program, separated by spaces. |
| Empty string (pointer to '\0') means no args. */ |
| |
| static char *inferior_args; |
| |
| /* The inferior arguments as a vector. If INFERIOR_ARGC is nonzero, |
| then we must compute INFERIOR_ARGS from this (via the target). */ |
| |
| static int inferior_argc; |
| static char **inferior_argv; |
| |
| /* File name for default use for standard in/out in the inferior. */ |
| |
| char *inferior_io_terminal; |
| |
| /* Pid of our debugged inferior, or 0 if no inferior now. |
| Since various parts of infrun.c test this to see whether there is a program |
| being debugged it should be nonzero (currently 3 is used) for remote |
| debugging. */ |
| |
| ptid_t inferior_ptid; |
| |
| /* Last signal that the inferior received (why it stopped). */ |
| |
| enum target_signal stop_signal; |
| |
| /* Address at which inferior stopped. */ |
| |
| CORE_ADDR stop_pc; |
| |
| /* Chain containing status of breakpoint(s) that we have stopped at. */ |
| |
| bpstat stop_bpstat; |
| |
| /* Flag indicating that a command has proceeded the inferior past the |
| current breakpoint. */ |
| |
| int breakpoint_proceeded; |
| |
| /* Nonzero if stopped due to a step command. */ |
| |
| int stop_step; |
| |
| /* Nonzero if stopped due to completion of a stack dummy routine. */ |
| |
| int stop_stack_dummy; |
| |
| /* Nonzero if stopped due to a random (unexpected) signal in inferior |
| process. */ |
| |
| int stopped_by_random_signal; |
| |
| /* Range to single step within. |
| If this is nonzero, respond to a single-step signal |
| by continuing to step if the pc is in this range. */ |
| |
| CORE_ADDR step_range_start; /* Inclusive */ |
| CORE_ADDR step_range_end; /* Exclusive */ |
| |
| /* Stack frame address as of when stepping command was issued. |
| This is how we know when we step into a subroutine call, |
| and how to set the frame for the breakpoint used to step out. */ |
| |
| struct frame_id step_frame_id; |
| |
| /* Our notion of the current stack pointer. */ |
| |
| CORE_ADDR step_sp; |
| |
| enum step_over_calls_kind step_over_calls; |
| |
| /* If stepping, nonzero means step count is > 1 |
| so don't print frame next time inferior stops |
| if it stops due to stepping. */ |
| |
| int step_multi; |
| |
| /* Environment to use for running inferior, |
| in format described in environ.h. */ |
| |
| struct environ *inferior_environ; |
| |
| /* Accessor routines. */ |
| |
| char * |
| get_inferior_args (void) |
| { |
| if (inferior_argc != 0) |
| { |
| char *n, *old; |
| |
| n = gdbarch_construct_inferior_arguments (current_gdbarch, |
| inferior_argc, inferior_argv); |
| old = set_inferior_args (n); |
| xfree (old); |
| } |
| |
| if (inferior_args == NULL) |
| inferior_args = xstrdup (""); |
| |
| return inferior_args; |
| } |
| |
| char * |
| set_inferior_args (char *newargs) |
| { |
| char *saved_args = inferior_args; |
| |
| inferior_args = newargs; |
| inferior_argc = 0; |
| inferior_argv = 0; |
| |
| return saved_args; |
| } |
| |
| void |
| set_inferior_args_vector (int argc, char **argv) |
| { |
| inferior_argc = argc; |
| inferior_argv = argv; |
| } |
| |
| /* Notice when `set args' is run. */ |
| static void |
| notice_args_set (char *args, int from_tty, struct cmd_list_element *c) |
| { |
| inferior_argc = 0; |
| inferior_argv = 0; |
| } |
| |
| /* Notice when `show args' is run. */ |
| static void |
| notice_args_read (char *args, int from_tty, struct cmd_list_element *c) |
| { |
| /* Might compute the value. */ |
| get_inferior_args (); |
| } |
| |
| |
| /* Compute command-line string given argument vector. This does the |
| same shell processing as fork_inferior. */ |
| /* ARGSUSED */ |
| char * |
| construct_inferior_arguments (struct gdbarch *gdbarch, int argc, char **argv) |
| { |
| char *result; |
| |
| if (STARTUP_WITH_SHELL) |
| { |
| /* This holds all the characters considered special to the |
| typical Unix shells. We include `^' because the SunOS |
| /bin/sh treats it as a synonym for `|'. */ |
| char *special = "\"!#$&*()\\|[]{}<>?'\"`~^; \t\n"; |
| int i; |
| int length = 0; |
| char *out, *cp; |
| |
| /* We over-compute the size. It shouldn't matter. */ |
| for (i = 0; i < argc; ++i) |
| length += 2 * strlen (argv[i]) + 1 + 2 * (argv[i][0] == '\0'); |
| |
| result = (char *) xmalloc (length); |
| out = result; |
| |
| for (i = 0; i < argc; ++i) |
| { |
| if (i > 0) |
| *out++ = ' '; |
| |
| /* Need to handle empty arguments specially. */ |
| if (argv[i][0] == '\0') |
| { |
| *out++ = '\''; |
| *out++ = '\''; |
| } |
| else |
| { |
| for (cp = argv[i]; *cp; ++cp) |
| { |
| if (strchr (special, *cp) != NULL) |
| *out++ = '\\'; |
| *out++ = *cp; |
| } |
| } |
| } |
| *out = '\0'; |
| } |
| else |
| { |
| /* In this case we can't handle arguments that contain spaces, |
| tabs, or newlines -- see breakup_args(). */ |
| int i; |
| int length = 0; |
| |
| for (i = 0; i < argc; ++i) |
| { |
| char *cp = strchr (argv[i], ' '); |
| if (cp == NULL) |
| cp = strchr (argv[i], '\t'); |
| if (cp == NULL) |
| cp = strchr (argv[i], '\n'); |
| if (cp != NULL) |
| error ("can't handle command-line argument containing whitespace"); |
| length += strlen (argv[i]) + 1; |
| } |
| |
| result = (char *) xmalloc (length); |
| result[0] = '\0'; |
| for (i = 0; i < argc; ++i) |
| { |
| if (i > 0) |
| strcat (result, " "); |
| strcat (result, argv[i]); |
| } |
| } |
| |
| return result; |
| } |
| |
| |
| /* This function detects whether or not a '&' character (indicating |
| background execution) has been added as *the last* of the arguments ARGS |
| of a command. If it has, it removes it and returns 1. Otherwise it |
| does nothing and returns 0. */ |
| static int |
| strip_bg_char (char **args) |
| { |
| char *p = NULL; |
| |
| p = strchr (*args, '&'); |
| |
| if (p) |
| { |
| if (p == (*args + strlen (*args) - 1)) |
| { |
| if (strlen (*args) > 1) |
| { |
| do |
| p--; |
| while (*p == ' ' || *p == '\t'); |
| *(p + 1) = '\0'; |
| } |
| else |
| *args = 0; |
| return 1; |
| } |
| } |
| return 0; |
| } |
| |
| /* ARGSUSED */ |
| void |
| tty_command (char *file, int from_tty) |
| { |
| if (file == 0) |
| error_no_arg ("terminal name for running target process"); |
| |
| inferior_io_terminal = savestring (file, strlen (file)); |
| } |
| |
| static void |
| run_command (char *args, int from_tty) |
| { |
| char *exec_file; |
| |
| dont_repeat (); |
| |
| if (! ptid_equal (inferior_ptid, null_ptid) && target_has_execution) |
| { |
| if (from_tty |
| && !query ("The program being debugged has been started already.\n\ |
| Start it from the beginning? ")) |
| error ("Program not restarted."); |
| target_kill (); |
| #if defined(SOLIB_RESTART) |
| SOLIB_RESTART (); |
| #endif |
| init_wait_for_inferior (); |
| } |
| |
| clear_breakpoint_hit_counts (); |
| |
| /* Purge old solib objfiles. */ |
| objfile_purge_solibs (); |
| |
| do_run_cleanups (NULL); |
| |
| /* The comment here used to read, "The exec file is re-read every |
| time we do a generic_mourn_inferior, so we just have to worry |
| about the symbol file." The `generic_mourn_inferior' function |
| gets called whenever the program exits. However, suppose the |
| program exits, and *then* the executable file changes? We need |
| to check again here. Since reopen_exec_file doesn't do anything |
| if the timestamp hasn't changed, I don't see the harm. */ |
| reopen_exec_file (); |
| reread_symbols (); |
| |
| exec_file = (char *) get_exec_file (0); |
| |
| /* We keep symbols from add-symbol-file, on the grounds that the |
| user might want to add some symbols before running the program |
| (right?). But sometimes (dynamic loading where the user manually |
| introduces the new symbols with add-symbol-file), the code which |
| the symbols describe does not persist between runs. Currently |
| the user has to manually nuke all symbols between runs if they |
| want them to go away (PR 2207). This is probably reasonable. */ |
| |
| if (!args) |
| { |
| if (event_loop_p && target_can_async_p ()) |
| async_disable_stdin (); |
| } |
| else |
| { |
| int async_exec = strip_bg_char (&args); |
| |
| /* If we get a request for running in the bg but the target |
| doesn't support it, error out. */ |
| if (event_loop_p && async_exec && !target_can_async_p ()) |
| error ("Asynchronous execution not supported on this target."); |
| |
| /* If we don't get a request of running in the bg, then we need |
| to simulate synchronous (fg) execution. */ |
| if (event_loop_p && !async_exec && target_can_async_p ()) |
| { |
| /* Simulate synchronous execution */ |
| async_disable_stdin (); |
| } |
| |
| /* If there were other args, beside '&', process them. */ |
| if (args) |
| { |
| char *old_args = set_inferior_args (xstrdup (args)); |
| xfree (old_args); |
| } |
| } |
| |
| if (from_tty) |
| { |
| ui_out_field_string (uiout, NULL, "Starting program"); |
| ui_out_text (uiout, ": "); |
| if (exec_file) |
| ui_out_field_string (uiout, "execfile", exec_file); |
| ui_out_spaces (uiout, 1); |
| /* We call get_inferior_args() because we might need to compute |
| the value now. */ |
| ui_out_field_string (uiout, "infargs", get_inferior_args ()); |
| ui_out_text (uiout, "\n"); |
| ui_out_flush (uiout); |
| } |
| |
| /* We call get_inferior_args() because we might need to compute |
| the value now. */ |
| target_create_inferior (exec_file, get_inferior_args (), |
| environ_vector (inferior_environ)); |
| } |
| |
| |
| static void |
| run_no_args_command (char *args, int from_tty) |
| { |
| char *old_args = set_inferior_args (xstrdup ("")); |
| xfree (old_args); |
| } |
| |
| |
| void |
| continue_command (char *proc_count_exp, int from_tty) |
| { |
| int async_exec = 0; |
| ERROR_NO_INFERIOR; |
| |
| /* Find out whether we must run in the background. */ |
| if (proc_count_exp != NULL) |
| async_exec = strip_bg_char (&proc_count_exp); |
| |
| /* If we must run in the background, but the target can't do it, |
| error out. */ |
| if (event_loop_p && async_exec && !target_can_async_p ()) |
| error ("Asynchronous execution not supported on this target."); |
| |
| /* If we are not asked to run in the bg, then prepare to run in the |
| foreground, synchronously. */ |
| if (event_loop_p && !async_exec && target_can_async_p ()) |
| { |
| /* Simulate synchronous execution */ |
| async_disable_stdin (); |
| } |
| |
| /* If have argument (besides '&'), set proceed count of breakpoint |
| we stopped at. */ |
| if (proc_count_exp != NULL) |
| { |
| bpstat bs = stop_bpstat; |
| int num = bpstat_num (&bs); |
| if (num == 0 && from_tty) |
| { |
| printf_filtered |
| ("Not stopped at any breakpoint; argument ignored.\n"); |
| } |
| while (num != 0) |
| { |
| set_ignore_count (num, |
| parse_and_eval_long (proc_count_exp) - 1, |
| from_tty); |
| /* set_ignore_count prints a message ending with a period. |
| So print two spaces before "Continuing.". */ |
| if (from_tty) |
| printf_filtered (" "); |
| num = bpstat_num (&bs); |
| } |
| } |
| |
| if (from_tty) |
| printf_filtered ("Continuing.\n"); |
| |
| clear_proceed_status (); |
| |
| proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0); |
| } |
| |
| /* Step until outside of current statement. */ |
| |
| /* ARGSUSED */ |
| static void |
| step_command (char *count_string, int from_tty) |
| { |
| step_1 (0, 0, count_string); |
| } |
| |
| /* Likewise, but skip over subroutine calls as if single instructions. */ |
| |
| /* ARGSUSED */ |
| static void |
| next_command (char *count_string, int from_tty) |
| { |
| step_1 (1, 0, count_string); |
| } |
| |
| /* Likewise, but step only one instruction. */ |
| |
| /* ARGSUSED */ |
| void |
| stepi_command (char *count_string, int from_tty) |
| { |
| step_1 (0, 1, count_string); |
| } |
| |
| /* ARGSUSED */ |
| void |
| nexti_command (char *count_string, int from_tty) |
| { |
| step_1 (1, 1, count_string); |
| } |
| |
| static void |
| disable_longjmp_breakpoint_cleanup (void *ignore) |
| { |
| disable_longjmp_breakpoint (); |
| } |
| |
| static void |
| step_1 (int skip_subroutines, int single_inst, char *count_string) |
| { |
| register int count = 1; |
| struct frame_info *frame; |
| struct cleanup *cleanups = 0; |
| int async_exec = 0; |
| |
| ERROR_NO_INFERIOR; |
| |
| if (count_string) |
| async_exec = strip_bg_char (&count_string); |
| |
| /* If we get a request for running in the bg but the target |
| doesn't support it, error out. */ |
| if (event_loop_p && async_exec && !target_can_async_p ()) |
| error ("Asynchronous execution not supported on this target."); |
| |
| /* If we don't get a request of running in the bg, then we need |
| to simulate synchronous (fg) execution. */ |
| if (event_loop_p && !async_exec && target_can_async_p ()) |
| { |
| /* Simulate synchronous execution */ |
| async_disable_stdin (); |
| } |
| |
| count = count_string ? parse_and_eval_long (count_string) : 1; |
| |
| if (!single_inst || skip_subroutines) /* leave si command alone */ |
| { |
| enable_longjmp_breakpoint (); |
| if (!event_loop_p || !target_can_async_p ()) |
| cleanups = make_cleanup (disable_longjmp_breakpoint_cleanup, 0 /*ignore*/); |
| else |
| make_exec_cleanup (disable_longjmp_breakpoint_cleanup, 0 /*ignore*/); |
| } |
| |
| /* In synchronous case, all is well, just use the regular for loop. */ |
| if (!event_loop_p || !target_can_async_p ()) |
| { |
| for (; count > 0; count--) |
| { |
| clear_proceed_status (); |
| |
| frame = get_current_frame (); |
| if (!frame) /* Avoid coredump here. Why tho? */ |
| error ("No current frame"); |
| step_frame_id = get_frame_id (frame); |
| step_sp = read_sp (); |
| |
| if (!single_inst) |
| { |
| find_pc_line_pc_range (stop_pc, &step_range_start, &step_range_end); |
| if (step_range_end == 0) |
| { |
| char *name; |
| if (find_pc_partial_function (stop_pc, &name, &step_range_start, |
| &step_range_end) == 0) |
| error ("Cannot find bounds of current function"); |
| |
| target_terminal_ours (); |
| printf_filtered ("\ |
| Single stepping until exit from function %s, \n\ |
| which has no line number information.\n", name); |
| } |
| } |
| else |
| { |
| /* Say we are stepping, but stop after one insn whatever it does. */ |
| step_range_start = step_range_end = 1; |
| if (!skip_subroutines) |
| /* It is stepi. |
| Don't step over function calls, not even to functions lacking |
| line numbers. */ |
| step_over_calls = STEP_OVER_NONE; |
| } |
| |
| if (skip_subroutines) |
| step_over_calls = STEP_OVER_ALL; |
| |
| step_multi = (count > 1); |
| proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 1); |
| |
| if (!stop_step) |
| break; |
| |
| /* FIXME: On nexti, this may have already been done (when we hit the |
| step resume break, I think). Probably this should be moved to |
| wait_for_inferior (near the top). */ |
| #if defined (SHIFT_INST_REGS) |
| SHIFT_INST_REGS (); |
| #endif |
| } |
| |
| if (!single_inst || skip_subroutines) |
| do_cleanups (cleanups); |
| return; |
| } |
| /* In case of asynchronous target things get complicated, do only |
| one step for now, before returning control to the event loop. Let |
| the continuation figure out how many other steps we need to do, |
| and handle them one at the time, through step_once(). */ |
| else |
| { |
| if (event_loop_p && target_can_async_p ()) |
| step_once (skip_subroutines, single_inst, count); |
| } |
| } |
| |
| /* Called after we are done with one step operation, to check whether |
| we need to step again, before we print the prompt and return control |
| to the user. If count is > 1, we will need to do one more call to |
| proceed(), via step_once(). Basically it is like step_once and |
| step_1_continuation are co-recursive. */ |
| static void |
| step_1_continuation (struct continuation_arg *arg) |
| { |
| int count; |
| int skip_subroutines; |
| int single_inst; |
| |
| skip_subroutines = arg->data.integer; |
| single_inst = arg->next->data.integer; |
| count = arg->next->next->data.integer; |
| |
| if (stop_step) |
| { |
| /* FIXME: On nexti, this may have already been done (when we hit the |
| step resume break, I think). Probably this should be moved to |
| wait_for_inferior (near the top). */ |
| #if defined (SHIFT_INST_REGS) |
| SHIFT_INST_REGS (); |
| #endif |
| step_once (skip_subroutines, single_inst, count - 1); |
| } |
| else |
| if (!single_inst || skip_subroutines) |
| do_exec_cleanups (ALL_CLEANUPS); |
| } |
| |
| /* Do just one step operation. If count >1 we will have to set up a |
| continuation to be done after the target stops (after this one |
| step). This is useful to implement the 'step n' kind of commands, in |
| case of asynchronous targets. We had to split step_1 into two parts, |
| one to be done before proceed() and one afterwards. This function is |
| called in case of step n with n>1, after the first step operation has |
| been completed.*/ |
| static void |
| step_once (int skip_subroutines, int single_inst, int count) |
| { |
| struct continuation_arg *arg1; |
| struct continuation_arg *arg2; |
| struct continuation_arg *arg3; |
| struct frame_info *frame; |
| |
| if (count > 0) |
| { |
| clear_proceed_status (); |
| |
| frame = get_current_frame (); |
| if (!frame) /* Avoid coredump here. Why tho? */ |
| error ("No current frame"); |
| step_frame_id = get_frame_id (frame); |
| step_sp = read_sp (); |
| |
| if (!single_inst) |
| { |
| find_pc_line_pc_range (stop_pc, &step_range_start, &step_range_end); |
| |
| /* If we have no line info, switch to stepi mode. */ |
| if (step_range_end == 0 && step_stop_if_no_debug) |
| { |
| step_range_start = step_range_end = 1; |
| } |
| else if (step_range_end == 0) |
| { |
| char *name; |
| if (find_pc_partial_function (stop_pc, &name, &step_range_start, |
| &step_range_end) == 0) |
| error ("Cannot find bounds of current function"); |
| |
| target_terminal_ours (); |
| printf_filtered ("\ |
| Single stepping until exit from function %s, \n\ |
| which has no line number information.\n", name); |
| } |
| } |
| else |
| { |
| /* Say we are stepping, but stop after one insn whatever it does. */ |
| step_range_start = step_range_end = 1; |
| if (!skip_subroutines) |
| /* It is stepi. |
| Don't step over function calls, not even to functions lacking |
| line numbers. */ |
| step_over_calls = STEP_OVER_NONE; |
| } |
| |
| if (skip_subroutines) |
| step_over_calls = STEP_OVER_ALL; |
| |
| step_multi = (count > 1); |
| arg1 = |
| (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg)); |
| arg2 = |
| (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg)); |
| arg3 = |
| (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg)); |
| arg1->next = arg2; |
| arg1->data.integer = skip_subroutines; |
| arg2->next = arg3; |
| arg2->data.integer = single_inst; |
| arg3->next = NULL; |
| arg3->data.integer = count; |
| add_intermediate_continuation (step_1_continuation, arg1); |
| proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 1); |
| } |
| } |
| |
| |
| /* Continue program at specified address. */ |
| |
| static void |
| jump_command (char *arg, int from_tty) |
| { |
| register CORE_ADDR addr; |
| struct symtabs_and_lines sals; |
| struct symtab_and_line sal; |
| struct symbol *fn; |
| struct symbol *sfn; |
| int async_exec = 0; |
| |
| ERROR_NO_INFERIOR; |
| |
| /* Find out whether we must run in the background. */ |
| if (arg != NULL) |
| async_exec = strip_bg_char (&arg); |
| |
| /* If we must run in the background, but the target can't do it, |
| error out. */ |
| if (event_loop_p && async_exec && !target_can_async_p ()) |
| error ("Asynchronous execution not supported on this target."); |
| |
| /* If we are not asked to run in the bg, then prepare to run in the |
| foreground, synchronously. */ |
| if (event_loop_p && !async_exec && target_can_async_p ()) |
| { |
| /* Simulate synchronous execution */ |
| async_disable_stdin (); |
| } |
| |
| if (!arg) |
| error_no_arg ("starting address"); |
| |
| sals = decode_line_spec_1 (arg, 1); |
| if (sals.nelts != 1) |
| { |
| error ("Unreasonable jump request"); |
| } |
| |
| sal = sals.sals[0]; |
| xfree (sals.sals); |
| |
| if (sal.symtab == 0 && sal.pc == 0) |
| error ("No source file has been specified."); |
| |
| resolve_sal_pc (&sal); /* May error out */ |
| |
| /* See if we are trying to jump to another function. */ |
| fn = get_frame_function (get_current_frame ()); |
| sfn = find_pc_function (sal.pc); |
| if (fn != NULL && sfn != fn) |
| { |
| if (!query ("Line %d is not in `%s'. Jump anyway? ", sal.line, |
| SYMBOL_SOURCE_NAME (fn))) |
| { |
| error ("Not confirmed."); |
| /* NOTREACHED */ |
| } |
| } |
| |
| if (sfn != NULL) |
| { |
| fixup_symbol_section (sfn, 0); |
| if (section_is_overlay (SYMBOL_BFD_SECTION (sfn)) && |
| !section_is_mapped (SYMBOL_BFD_SECTION (sfn))) |
| { |
| if (!query ("WARNING!!! Destination is in unmapped overlay! Jump anyway? ")) |
| { |
| error ("Not confirmed."); |
| /* NOTREACHED */ |
| } |
| } |
| } |
| |
| addr = sal.pc; |
| |
| if (from_tty) |
| { |
| printf_filtered ("Continuing at "); |
| print_address_numeric (addr, 1, gdb_stdout); |
| printf_filtered (".\n"); |
| } |
| |
| clear_proceed_status (); |
| proceed (addr, TARGET_SIGNAL_0, 0); |
| } |
| |
| |
| /* Go to line or address in current procedure */ |
| static void |
| go_command (char *line_no, int from_tty) |
| { |
| if (line_no == (char *) NULL || !*line_no) |
| printf_filtered (GO_USAGE); |
| else |
| { |
| tbreak_command (line_no, from_tty); |
| jump_command (line_no, from_tty); |
| } |
| } |
| |
| |
| /* Continue program giving it specified signal. */ |
| |
| static void |
| signal_command (char *signum_exp, int from_tty) |
| { |
| enum target_signal oursig; |
| |
| dont_repeat (); /* Too dangerous. */ |
| ERROR_NO_INFERIOR; |
| |
| if (!signum_exp) |
| error_no_arg ("signal number"); |
| |
| /* It would be even slicker to make signal names be valid expressions, |
| (the type could be "enum $signal" or some such), then the user could |
| assign them to convenience variables. */ |
| oursig = target_signal_from_name (signum_exp); |
| |
| if (oursig == TARGET_SIGNAL_UNKNOWN) |
| { |
| /* No, try numeric. */ |
| int num = parse_and_eval_long (signum_exp); |
| |
| if (num == 0) |
| oursig = TARGET_SIGNAL_0; |
| else |
| oursig = target_signal_from_command (num); |
| } |
| |
| if (from_tty) |
| { |
| if (oursig == TARGET_SIGNAL_0) |
| printf_filtered ("Continuing with no signal.\n"); |
| else |
| printf_filtered ("Continuing with signal %s.\n", |
| target_signal_to_name (oursig)); |
| } |
| |
| clear_proceed_status (); |
| /* "signal 0" should not get stuck if we are stopped at a breakpoint. |
| FIXME: Neither should "signal foo" but when I tried passing |
| (CORE_ADDR)-1 unconditionally I got a testsuite failure which I haven't |
| tried to track down yet. */ |
| proceed (oursig == TARGET_SIGNAL_0 ? (CORE_ADDR) -1 : stop_pc, oursig, 0); |
| } |
| |
| /* Call breakpoint_auto_delete on the current contents of the bpstat |
| pointed to by arg (which is really a bpstat *). */ |
| |
| static void |
| breakpoint_auto_delete_contents (void *arg) |
| { |
| breakpoint_auto_delete (*(bpstat *) arg); |
| } |
| |
| |
| /* Execute a "stack dummy", a piece of code stored in the stack |
| by the debugger to be executed in the inferior. |
| |
| To call: first, do PUSH_DUMMY_FRAME. |
| Then push the contents of the dummy. It should end with a breakpoint insn. |
| Then call here, passing address at which to start the dummy. |
| |
| The contents of all registers are saved before the dummy frame is popped |
| and copied into the buffer BUFFER. |
| |
| The dummy's frame is automatically popped whenever that break is hit. |
| If that is the first time the program stops, run_stack_dummy |
| returns to its caller with that frame already gone and returns 0. |
| |
| Otherwise, run_stack-dummy returns a non-zero value. |
| If the called function receives a random signal, we do not allow the user |
| to continue executing it as this may not work. The dummy frame is poped |
| and we return 1. |
| If we hit a breakpoint, we leave the frame in place and return 2 (the frame |
| will eventually be popped when we do hit the dummy end breakpoint). */ |
| |
| int |
| run_stack_dummy (CORE_ADDR addr, struct regcache *buffer) |
| { |
| struct cleanup *old_cleanups = make_cleanup (null_cleanup, 0); |
| int saved_async = 0; |
| |
| /* Now proceed, having reached the desired place. */ |
| clear_proceed_status (); |
| |
| if (CALL_DUMMY_BREAKPOINT_OFFSET_P) |
| { |
| struct breakpoint *bpt; |
| struct symtab_and_line sal; |
| |
| init_sal (&sal); /* initialize to zeroes */ |
| if (CALL_DUMMY_LOCATION == AT_ENTRY_POINT) |
| { |
| sal.pc = CALL_DUMMY_ADDRESS (); |
| } |
| else |
| { |
| /* If defined, CALL_DUMMY_BREAKPOINT_OFFSET is where we need |
| to put a breakpoint instruction. If not, the call dummy |
| already has the breakpoint instruction in it. |
| |
| ADDR IS THE ADDRESS of the call dummy plus the |
| CALL_DUMMY_START_OFFSET, so we need to subtract the |
| CALL_DUMMY_START_OFFSET. */ |
| sal.pc = addr - CALL_DUMMY_START_OFFSET + CALL_DUMMY_BREAKPOINT_OFFSET; |
| } |
| sal.section = find_pc_overlay (sal.pc); |
| |
| { |
| /* Set up a frame ID for the dummy frame so we can pass it to |
| set_momentary_breakpoint. We need to give the breakpoint a |
| frame ID so that the breakpoint code can correctly |
| re-identify the dummy breakpoint. */ |
| struct frame_id frame = frame_id_build (read_fp (), sal.pc); |
| /* Create a momentary breakpoint at the return address of the |
| inferior. That way it breaks when it returns. */ |
| bpt = set_momentary_breakpoint (sal, frame, bp_call_dummy); |
| bpt->disposition = disp_del; |
| } |
| |
| /* If all error()s out of proceed ended up calling normal_stop (and |
| perhaps they should; it already does in the special case of error |
| out of resume()), then we wouldn't need this. */ |
| make_cleanup (breakpoint_auto_delete_contents, &stop_bpstat); |
| } |
| |
| disable_watchpoints_before_interactive_call_start (); |
| proceed_to_finish = 1; /* We want stop_registers, please... */ |
| |
| if (target_can_async_p ()) |
| saved_async = target_async_mask (0); |
| |
| proceed (addr, TARGET_SIGNAL_0, 0); |
| |
| if (saved_async) |
| target_async_mask (saved_async); |
| |
| enable_watchpoints_after_interactive_call_stop (); |
| |
| discard_cleanups (old_cleanups); |
| |
| /* We can stop during an inferior call because a signal is received. */ |
| if (stopped_by_random_signal) |
| return 1; |
| |
| /* We may also stop prematurely because we hit a breakpoint in the |
| called routine. */ |
| if (!stop_stack_dummy) |
| return 2; |
| |
| /* On normal return, the stack dummy has been popped already. */ |
| regcache_cpy_no_passthrough (buffer, stop_registers); |
| return 0; |
| } |
| |
| /* Proceed until we reach a different source line with pc greater than |
| our current one or exit the function. We skip calls in both cases. |
| |
| Note that eventually this command should probably be changed so |
| that only source lines are printed out when we hit the breakpoint |
| we set. This may involve changes to wait_for_inferior and the |
| proceed status code. */ |
| |
| /* ARGSUSED */ |
| static void |
| until_next_command (int from_tty) |
| { |
| struct frame_info *frame; |
| CORE_ADDR pc; |
| struct symbol *func; |
| struct symtab_and_line sal; |
| |
| clear_proceed_status (); |
| |
| frame = get_current_frame (); |
| |
| /* Step until either exited from this function or greater |
| than the current line (if in symbolic section) or pc (if |
| not). */ |
| |
| pc = read_pc (); |
| func = find_pc_function (pc); |
| |
| if (!func) |
| { |
| struct minimal_symbol *msymbol = lookup_minimal_symbol_by_pc (pc); |
| |
| if (msymbol == NULL) |
| error ("Execution is not within a known function."); |
| |
| step_range_start = SYMBOL_VALUE_ADDRESS (msymbol); |
| step_range_end = pc; |
| } |
| else |
| { |
| sal = find_pc_line (pc, 0); |
| |
| step_range_start = BLOCK_START (SYMBOL_BLOCK_VALUE (func)); |
| step_range_end = sal.end; |
| } |
| |
| step_over_calls = STEP_OVER_ALL; |
| step_frame_id = get_frame_id (frame); |
| step_sp = read_sp (); |
| |
| step_multi = 0; /* Only one call to proceed */ |
| |
| proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 1); |
| } |
| |
| static void |
| until_command (char *arg, int from_tty) |
| { |
| int async_exec = 0; |
| |
| if (!target_has_execution) |
| error ("The program is not running."); |
| |
| /* Find out whether we must run in the background. */ |
| if (arg != NULL) |
| async_exec = strip_bg_char (&arg); |
| |
| /* If we must run in the background, but the target can't do it, |
| error out. */ |
| if (event_loop_p && async_exec && !target_can_async_p ()) |
| error ("Asynchronous execution not supported on this target."); |
| |
| /* If we are not asked to run in the bg, then prepare to run in the |
| foreground, synchronously. */ |
| if (event_loop_p && !async_exec && target_can_async_p ()) |
| { |
| /* Simulate synchronous execution */ |
| async_disable_stdin (); |
| } |
| |
| if (arg) |
| until_break_command (arg, from_tty, 0); |
| else |
| until_next_command (from_tty); |
| } |
| |
| static void |
| advance_command (char *arg, int from_tty) |
| { |
| int async_exec = 0; |
| |
| if (!target_has_execution) |
| error ("The program is not running."); |
| |
| if (arg == NULL) |
| error_no_arg ("a location"); |
| |
| /* Find out whether we must run in the background. */ |
| if (arg != NULL) |
| async_exec = strip_bg_char (&arg); |
| |
| /* If we must run in the background, but the target can't do it, |
| error out. */ |
| if (event_loop_p && async_exec && !target_can_async_p ()) |
| error ("Asynchronous execution not supported on this target."); |
| |
| /* If we are not asked to run in the bg, then prepare to run in the |
| foreground, synchronously. */ |
| if (event_loop_p && !async_exec && target_can_async_p ()) |
| { |
| /* Simulate synchronous execution. */ |
| async_disable_stdin (); |
| } |
| |
| until_break_command (arg, from_tty, 1); |
| } |
| |
| |
| /* Print the result of a function at the end of a 'finish' command. */ |
| static void |
| print_return_value (int structure_return, struct type *value_type) |
| { |
| struct value *value; |
| static struct ui_stream *stb = NULL; |
| |
| if (!structure_return) |
| { |
| value = value_being_returned (value_type, stop_registers, structure_return); |
| stb = ui_out_stream_new (uiout); |
| ui_out_text (uiout, "Value returned is "); |
| ui_out_field_fmt (uiout, "gdb-result-var", "$%d", record_latest_value (value)); |
| ui_out_text (uiout, " = "); |
| value_print (value, stb->stream, 0, Val_no_prettyprint); |
| ui_out_field_stream (uiout, "return-value", stb); |
| ui_out_text (uiout, "\n"); |
| } |
| else |
| { |
| /* We cannot determine the contents of the structure because |
| it is on the stack, and we don't know where, since we did not |
| initiate the call, as opposed to the call_function_by_hand case */ |
| #ifdef VALUE_RETURNED_FROM_STACK |
| value = 0; |
| ui_out_text (uiout, "Value returned has type: "); |
| ui_out_field_string (uiout, "return-type", TYPE_NAME (value_type)); |
| ui_out_text (uiout, "."); |
| ui_out_text (uiout, " Cannot determine contents\n"); |
| #else |
| value = value_being_returned (value_type, stop_registers, structure_return); |
| stb = ui_out_stream_new (uiout); |
| ui_out_text (uiout, "Value returned is "); |
| ui_out_field_fmt (uiout, "gdb-result-var", "$%d", record_latest_value (value)); |
| ui_out_text (uiout, " = "); |
| value_print (value, stb->stream, 0, Val_no_prettyprint); |
| ui_out_field_stream (uiout, "return-value", stb); |
| ui_out_text (uiout, "\n"); |
| #endif |
| } |
| } |
| |
| /* Stuff that needs to be done by the finish command after the target |
| has stopped. In asynchronous mode, we wait for the target to stop in |
| the call to poll or select in the event loop, so it is impossible to |
| do all the stuff as part of the finish_command function itself. The |
| only chance we have to complete this command is in |
| fetch_inferior_event, which is called by the event loop as soon as it |
| detects that the target has stopped. This function is called via the |
| cmd_continuation pointer. */ |
| void |
| finish_command_continuation (struct continuation_arg *arg) |
| { |
| register struct symbol *function; |
| struct breakpoint *breakpoint; |
| struct cleanup *cleanups; |
| |
| breakpoint = (struct breakpoint *) arg->data.pointer; |
| function = (struct symbol *) arg->next->data.pointer; |
| cleanups = (struct cleanup *) arg->next->next->data.pointer; |
| |
| if (bpstat_find_breakpoint (stop_bpstat, breakpoint) != NULL |
| && function != 0) |
| { |
| struct type *value_type; |
| CORE_ADDR funcaddr; |
| int struct_return; |
| |
| value_type = TYPE_TARGET_TYPE (SYMBOL_TYPE (function)); |
| if (!value_type) |
| internal_error (__FILE__, __LINE__, |
| "finish_command: function has no target type"); |
| |
| if (TYPE_CODE (value_type) == TYPE_CODE_VOID) |
| { |
| do_exec_cleanups (cleanups); |
| return; |
| } |
| |
| funcaddr = BLOCK_START (SYMBOL_BLOCK_VALUE (function)); |
| |
| struct_return = using_struct_return (value_of_variable (function, NULL), |
| funcaddr, |
| check_typedef (value_type), |
| BLOCK_GCC_COMPILED (SYMBOL_BLOCK_VALUE (function))); |
| |
| print_return_value (struct_return, value_type); |
| } |
| do_exec_cleanups (cleanups); |
| } |
| |
| /* "finish": Set a temporary breakpoint at the place |
| the selected frame will return to, then continue. */ |
| |
| static void |
| finish_command (char *arg, int from_tty) |
| { |
| struct symtab_and_line sal; |
| register struct frame_info *frame; |
| register struct symbol *function; |
| struct breakpoint *breakpoint; |
| struct cleanup *old_chain; |
| struct continuation_arg *arg1, *arg2, *arg3; |
| |
| int async_exec = 0; |
| |
| /* Find out whether we must run in the background. */ |
| if (arg != NULL) |
| async_exec = strip_bg_char (&arg); |
| |
| /* If we must run in the background, but the target can't do it, |
| error out. */ |
| if (event_loop_p && async_exec && !target_can_async_p ()) |
| error ("Asynchronous execution not supported on this target."); |
| |
| /* If we are not asked to run in the bg, then prepare to run in the |
| foreground, synchronously. */ |
| if (event_loop_p && !async_exec && target_can_async_p ()) |
| { |
| /* Simulate synchronous execution */ |
| async_disable_stdin (); |
| } |
| |
| if (arg) |
| error ("The \"finish\" command does not take any arguments."); |
| if (!target_has_execution) |
| error ("The program is not running."); |
| if (deprecated_selected_frame == NULL) |
| error ("No selected frame."); |
| |
| frame = get_prev_frame (deprecated_selected_frame); |
| if (frame == 0) |
| error ("\"finish\" not meaningful in the outermost frame."); |
| |
| clear_proceed_status (); |
| |
| sal = find_pc_line (get_frame_pc (frame), 0); |
| sal.pc = get_frame_pc (frame); |
| |
| breakpoint = set_momentary_breakpoint (sal, get_frame_id (frame), bp_finish); |
| |
| if (!event_loop_p || !target_can_async_p ()) |
| old_chain = make_cleanup_delete_breakpoint (breakpoint); |
| else |
| old_chain = make_exec_cleanup_delete_breakpoint (breakpoint); |
| |
| /* Find the function we will return from. */ |
| |
| function = find_pc_function (get_frame_pc (deprecated_selected_frame)); |
| |
| /* Print info on the selected frame, including level number |
| but not source. */ |
| if (from_tty) |
| { |
| printf_filtered ("Run till exit from "); |
| print_stack_frame (deprecated_selected_frame, |
| frame_relative_level (deprecated_selected_frame), 0); |
| } |
| |
| /* If running asynchronously and the target support asynchronous |
| execution, set things up for the rest of the finish command to be |
| completed later on, when gdb has detected that the target has |
| stopped, in fetch_inferior_event. */ |
| if (event_loop_p && target_can_async_p ()) |
| { |
| arg1 = |
| (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg)); |
| arg2 = |
| (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg)); |
| arg3 = |
| (struct continuation_arg *) xmalloc (sizeof (struct continuation_arg)); |
| arg1->next = arg2; |
| arg2->next = arg3; |
| arg3->next = NULL; |
| arg1->data.pointer = breakpoint; |
| arg2->data.pointer = function; |
| arg3->data.pointer = old_chain; |
| add_continuation (finish_command_continuation, arg1); |
| } |
| |
| proceed_to_finish = 1; /* We want stop_registers, please... */ |
| proceed ((CORE_ADDR) -1, TARGET_SIGNAL_DEFAULT, 0); |
| |
| /* Do this only if not running asynchronously or if the target |
| cannot do async execution. Otherwise, complete this command when |
| the target actually stops, in fetch_inferior_event. */ |
| if (!event_loop_p || !target_can_async_p ()) |
| { |
| |
| /* Did we stop at our breakpoint? */ |
| if (bpstat_find_breakpoint (stop_bpstat, breakpoint) != NULL |
| && function != 0) |
| { |
| struct type *value_type; |
| CORE_ADDR funcaddr; |
| int struct_return; |
| |
| value_type = TYPE_TARGET_TYPE (SYMBOL_TYPE (function)); |
| if (!value_type) |
| internal_error (__FILE__, __LINE__, |
| "finish_command: function has no target type"); |
| |
| /* FIXME: Shouldn't we do the cleanups before returning? */ |
| if (TYPE_CODE (value_type) == TYPE_CODE_VOID) |
| return; |
| |
| funcaddr = BLOCK_START (SYMBOL_BLOCK_VALUE (function)); |
| |
| struct_return = |
| using_struct_return (value_of_variable (function, NULL), |
| funcaddr, |
| check_typedef (value_type), |
| BLOCK_GCC_COMPILED (SYMBOL_BLOCK_VALUE (function))); |
| |
| print_return_value (struct_return, value_type); |
| } |
| do_cleanups (old_chain); |
| } |
| } |
| |
| /* ARGSUSED */ |
| static void |
| program_info (char *args, int from_tty) |
| { |
| bpstat bs = stop_bpstat; |
| int num = bpstat_num (&bs); |
| |
| if (!target_has_execution) |
| { |
| printf_filtered ("The program being debugged is not being run.\n"); |
| return; |
| } |
| |
| target_files_info (); |
| printf_filtered ("Program stopped at %s.\n", |
| local_hex_string ((unsigned long) stop_pc)); |
| if (stop_step) |
| printf_filtered ("It stopped after being stepped.\n"); |
| else if (num != 0) |
| { |
| /* There may be several breakpoints in the same place, so this |
| isn't as strange as it seems. */ |
| while (num != 0) |
| { |
| if (num < 0) |
| { |
| printf_filtered ("It stopped at a breakpoint that has "); |
| printf_filtered ("since been deleted.\n"); |
| } |
| else |
| printf_filtered ("It stopped at breakpoint %d.\n", num); |
| num = bpstat_num (&bs); |
| } |
| } |
| else if (stop_signal != TARGET_SIGNAL_0) |
| { |
| printf_filtered ("It stopped with signal %s, %s.\n", |
| target_signal_to_name (stop_signal), |
| target_signal_to_string (stop_signal)); |
| } |
| |
| if (!from_tty) |
| { |
| printf_filtered ("Type \"info stack\" or \"info registers\" "); |
| printf_filtered ("for more information.\n"); |
| } |
| } |
| |
| static void |
| environment_info (char *var, int from_tty) |
| { |
| if (var) |
| { |
| register char *val = get_in_environ (inferior_environ, var); |
| if (val) |
| { |
| puts_filtered (var); |
| puts_filtered (" = "); |
| puts_filtered (val); |
| puts_filtered ("\n"); |
| } |
| else |
| { |
| puts_filtered ("Environment variable \""); |
| puts_filtered (var); |
| puts_filtered ("\" not defined.\n"); |
| } |
| } |
| else |
| { |
| register char **vector = environ_vector (inferior_environ); |
| while (*vector) |
| { |
| puts_filtered (*vector++); |
| puts_filtered ("\n"); |
| } |
| } |
| } |
| |
| static void |
| set_environment_command (char *arg, int from_tty) |
| { |
| register char *p, *val, *var; |
| int nullset = 0; |
| |
| if (arg == 0) |
| error_no_arg ("environment variable and value"); |
| |
| /* Find seperation between variable name and value */ |
| p = (char *) strchr (arg, '='); |
| val = (char *) strchr (arg, ' '); |
| |
| if (p != 0 && val != 0) |
| { |
| /* We have both a space and an equals. If the space is before the |
| equals, walk forward over the spaces til we see a nonspace |
| (possibly the equals). */ |
| if (p > val) |
| while (*val == ' ') |
| val++; |
| |
| /* Now if the = is after the char following the spaces, |
| take the char following the spaces. */ |
| if (p > val) |
| p = val - 1; |
| } |
| else if (val != 0 && p == 0) |
| p = val; |
| |
| if (p == arg) |
| error_no_arg ("environment variable to set"); |
| |
| if (p == 0 || p[1] == 0) |
| { |
| nullset = 1; |
| if (p == 0) |
| p = arg + strlen (arg); /* So that savestring below will work */ |
| } |
| else |
| { |
| /* Not setting variable value to null */ |
| val = p + 1; |
| while (*val == ' ' || *val == '\t') |
| val++; |
| } |
| |
| while (p != arg && (p[-1] == ' ' || p[-1] == '\t')) |
| p--; |
| |
| var = savestring (arg, p - arg); |
| if (nullset) |
| { |
| printf_filtered ("Setting environment variable "); |
| printf_filtered ("\"%s\" to null value.\n", var); |
| set_in_environ (inferior_environ, var, ""); |
| } |
| else |
| set_in_environ (inferior_environ, var, val); |
| xfree (var); |
| } |
| |
| static void |
| unset_environment_command (char *var, int from_tty) |
| { |
| if (var == 0) |
| { |
| /* If there is no argument, delete all environment variables. |
| Ask for confirmation if reading from the terminal. */ |
| if (!from_tty || query ("Delete all environment variables? ")) |
| { |
| free_environ (inferior_environ); |
| inferior_environ = make_environ (); |
| } |
| } |
| else |
| unset_in_environ (inferior_environ, var); |
| } |
| |
| /* Handle the execution path (PATH variable) */ |
| |
| static const char path_var_name[] = "PATH"; |
| |
| /* ARGSUSED */ |
| static void |
| path_info (char *args, int from_tty) |
| { |
| puts_filtered ("Executable and object file path: "); |
| puts_filtered (get_in_environ (inferior_environ, path_var_name)); |
| puts_filtered ("\n"); |
| } |
| |
| /* Add zero or more directories to the front of the execution path. */ |
| |
| static void |
| path_command (char *dirname, int from_tty) |
| { |
| char *exec_path; |
| char *env; |
| dont_repeat (); |
| env = get_in_environ (inferior_environ, path_var_name); |
| /* Can be null if path is not set */ |
| if (!env) |
| env = ""; |
| exec_path = xstrdup (env); |
| mod_path (dirname, &exec_path); |
| set_in_environ (inferior_environ, path_var_name, exec_path); |
| xfree (exec_path); |
| if (from_tty) |
| path_info ((char *) NULL, from_tty); |
| } |
| |
| |
| #ifdef REGISTER_NAMES |
| char *gdb_register_names[] = REGISTER_NAMES; |
| #endif |
| /* Print out the machine register regnum. If regnum is -1, print all |
| registers (print_all == 1) or all non-float and non-vector |
| registers (print_all == 0). |
| |
| For most machines, having all_registers_info() print the |
| register(s) one per line is good enough. If a different format is |
| required, (eg, for MIPS or Pyramid 90x, which both have lots of |
| regs), or there is an existing convention for showing all the |
| registers, define the architecture method PRINT_REGISTERS_INFO to |
| provide that format. */ |
| |
| void |
| default_print_registers_info (struct gdbarch *gdbarch, |
| struct ui_file *file, |
| struct frame_info *frame, |
| int regnum, int print_all) |
| { |
| int i; |
| const int numregs = NUM_REGS + NUM_PSEUDO_REGS; |
| char *raw_buffer = alloca (MAX_REGISTER_RAW_SIZE); |
| char *virtual_buffer = alloca (MAX_REGISTER_VIRTUAL_SIZE); |
| |
| if (DEPRECATED_DO_REGISTERS_INFO_P ()) |
| { |
| DEPRECATED_DO_REGISTERS_INFO (regnum, print_all); |
| return; |
| } |
| |
| for (i = 0; i < numregs; i++) |
| { |
| /* Decide between printing all regs, non-float / vector regs, or |
| specific reg. */ |
| if (regnum == -1) |
| { |
| if (print_all) |
| { |
| if (!gdbarch_register_reggroup_p (gdbarch, i, all_reggroup)) |
| continue; |
| } |
| else |
| { |
| if (!gdbarch_register_reggroup_p (gdbarch, i, general_reggroup)) |
| continue; |
| } |
| } |
| else |
| { |
| if (i != regnum) |
| continue; |
| } |
| |
| /* If the register name is empty, it is undefined for this |
| processor, so don't display anything. */ |
| if (REGISTER_NAME (i) == NULL || *(REGISTER_NAME (i)) == '\0') |
| continue; |
| |
| fputs_filtered (REGISTER_NAME (i), file); |
| print_spaces_filtered (15 - strlen (REGISTER_NAME (i)), file); |
| |
| /* Get the data in raw format. */ |
| if (! frame_register_read (frame, i, raw_buffer)) |
| { |
| fprintf_filtered (file, "*value not available*\n"); |
| continue; |
| } |
| |
| /* FIXME: cagney/2002-08-03: This code shouldn't be necessary. |
| The function frame_register_read() should have returned the |
| pre-cooked register so no conversion is necessary. */ |
| /* Convert raw data to virtual format if necessary. */ |
| if (REGISTER_CONVERTIBLE (i)) |
| { |
| REGISTER_CONVERT_TO_VIRTUAL (i, REGISTER_VIRTUAL_TYPE (i), |
| raw_buffer, virtual_buffer); |
| } |
| else |
| { |
| memcpy (virtual_buffer, raw_buffer, |
| REGISTER_VIRTUAL_SIZE (i)); |
| } |
| |
| /* If virtual format is floating, print it that way, and in raw |
| hex. */ |
| if (TYPE_CODE (REGISTER_VIRTUAL_TYPE (i)) == TYPE_CODE_FLT) |
| { |
| int j; |
| |
| val_print (REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0, |
| file, 0, 1, 0, Val_pretty_default); |
| |
| fprintf_filtered (file, "\t(raw 0x"); |
| for (j = 0; j < REGISTER_RAW_SIZE (i); j++) |
| { |
| int idx; |
| if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) |
| idx = j; |
| else |
| idx = REGISTER_RAW_SIZE (i) - 1 - j; |
| fprintf_filtered (file, "%02x", (unsigned char) raw_buffer[idx]); |
| } |
| fprintf_filtered (file, ")"); |
| } |
| else |
| { |
| /* Print the register in hex. */ |
| val_print (REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0, |
| file, 'x', 1, 0, Val_pretty_default); |
| /* If not a vector register, print it also according to its |
| natural format. */ |
| if (TYPE_VECTOR (REGISTER_VIRTUAL_TYPE (i)) == 0) |
| { |
| fprintf_filtered (file, "\t"); |
| val_print (REGISTER_VIRTUAL_TYPE (i), virtual_buffer, 0, 0, |
| file, 0, 1, 0, Val_pretty_default); |
| } |
| } |
| |
| fprintf_filtered (file, "\n"); |
| } |
| } |
| |
| void |
| registers_info (char *addr_exp, int fpregs) |
| { |
| int regnum, numregs; |
| register char *end; |
| |
| if (!target_has_registers) |
| error ("The program has no registers now."); |
| if (deprecated_selected_frame == NULL) |
| error ("No selected frame."); |
| |
| if (!addr_exp) |
| { |
| gdbarch_print_registers_info (current_gdbarch, gdb_stdout, |
| deprecated_selected_frame, -1, fpregs); |
| return; |
| } |
| |
| while (*addr_exp != '\0') |
| { |
| char *start; |
| const char *end; |
| |
| /* Keep skipping leading white space. */ |
| if (isspace ((*addr_exp))) |
| { |
| addr_exp++; |
| continue; |
| } |
| |
| /* Discard any leading ``$''. Check that there is something |
| resembling a register following it. */ |
| if (addr_exp[0] == '$') |
| addr_exp++; |
| if (isspace ((*addr_exp)) || (*addr_exp) == '\0') |
| error ("Missing register name"); |
| |
| /* Find the start/end of this register name/num/group. */ |
| start = addr_exp; |
| while ((*addr_exp) != '\0' && !isspace ((*addr_exp))) |
| addr_exp++; |
| end = addr_exp; |
| |
| /* Figure out what we've found and display it. */ |
| |
| /* A register name? */ |
| { |
| int regnum = frame_map_name_to_regnum (start, end - start); |
| if (regnum >= 0) |
| { |
| gdbarch_print_registers_info (current_gdbarch, gdb_stdout, |
| deprecated_selected_frame, regnum, fpregs); |
| continue; |
| } |
| } |
| |
| /* A register number? (how portable is this one?). */ |
| { |
| char *endptr; |
| int regnum = strtol (start, &endptr, 0); |
| if (endptr == end |
| && regnum >= 0 |
| && regnum < NUM_REGS + NUM_PSEUDO_REGS) |
| { |
| gdbarch_print_registers_info (current_gdbarch, gdb_stdout, |
| deprecated_selected_frame, regnum, fpregs); |
| continue; |
| } |
| } |
| |
| /* A register group? */ |
| { |
| struct reggroup *const *group; |
| for (group = reggroups (current_gdbarch); |
| (*group) != NULL; |
| group++) |
| { |
| /* Don't bother with a length check. Should the user |
| enter a short register group name, go with the first |
| group that matches. */ |
| if (strncmp (start, reggroup_name ((*group)), end - start) == 0) |
| break; |
| } |
| if ((*group) != NULL) |
| { |
| int regnum; |
| for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++) |
| { |
| if (gdbarch_register_reggroup_p (current_gdbarch, regnum, |
| (*group))) |
| gdbarch_print_registers_info (current_gdbarch, |
| gdb_stdout, deprecated_selected_frame, |
| regnum, fpregs); |
| } |
| continue; |
| } |
| } |
| |
| /* Nothing matched. */ |
| error ("Invalid register `%.*s'", (int) (end - start), start); |
| } |
| } |
| |
| void |
| all_registers_info (char *addr_exp, int from_tty) |
| { |
| registers_info (addr_exp, 1); |
| } |
| |
| static void |
| nofp_registers_info (char *addr_exp, int from_tty) |
| { |
| registers_info (addr_exp, 0); |
| } |
| |
| static void |
| print_vector_info (struct gdbarch *gdbarch, struct ui_file *file, |
| struct frame_info *frame, const char *args) |
| { |
| if (!target_has_registers) |
| error ("The program has no registers now."); |
| if (deprecated_selected_frame == NULL) |
| error ("No selected frame."); |
| |
| if (gdbarch_print_vector_info_p (gdbarch)) |
| gdbarch_print_vector_info (gdbarch, file, frame, args); |
| else |
| { |
| int regnum; |
| int printed_something = 0; |
| |
| for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++) |
| { |
| if (gdbarch_register_reggroup_p (gdbarch, regnum, vector_reggroup)) |
| { |
| printed_something = 1; |
| gdbarch_print_registers_info (gdbarch, file, frame, regnum, 1); |
| } |
| } |
| if (!printed_something) |
| fprintf_filtered (file, "No vector information\n"); |
| } |
| } |
| |
| static void |
| vector_info (char *args, int from_tty) |
| { |
| print_vector_info (current_gdbarch, gdb_stdout, deprecated_selected_frame, args); |
| } |
| |
| |
| /* |
| * TODO: |
| * Should save/restore the tty state since it might be that the |
| * program to be debugged was started on this tty and it wants |
| * the tty in some state other than what we want. If it's running |
| * on another terminal or without a terminal, then saving and |
| * restoring the tty state is a harmless no-op. |
| * This only needs to be done if we are attaching to a process. |
| */ |
| |
| /* |
| attach_command -- |
| takes a program started up outside of gdb and ``attaches'' to it. |
| This stops it cold in its tracks and allows us to start debugging it. |
| and wait for the trace-trap that results from attaching. */ |
| |
| void |
| attach_command (char *args, int from_tty) |
| { |
| char *exec_file; |
| char *full_exec_path = NULL; |
| |
| dont_repeat (); /* Not for the faint of heart */ |
| |
| if (target_has_execution) |
| { |
| if (query ("A program is being debugged already. Kill it? ")) |
| target_kill (); |
| else |
| error ("Not killed."); |
| } |
| |
| target_attach (args, from_tty); |
| |
| /* Set up the "saved terminal modes" of the inferior |
| based on what modes we are starting it with. */ |
| target_terminal_init (); |
| |
| /* Install inferior's terminal modes. */ |
| target_terminal_inferior (); |
| |
| /* Set up execution context to know that we should return from |
| wait_for_inferior as soon as the target reports a stop. */ |
| init_wait_for_inferior (); |
| clear_proceed_status (); |
| |
| /* No traps are generated when attaching to inferior under Mach 3 |
| or GNU hurd. */ |
| #ifndef ATTACH_NO_WAIT |
| stop_soon_quietly = 1; |
| wait_for_inferior (); |
| #endif |
| |
| /* |
| * If no exec file is yet known, try to determine it from the |
| * process itself. |
| */ |
| exec_file = (char *) get_exec_file (0); |
| if (!exec_file) |
| { |
| exec_file = target_pid_to_exec_file (PIDGET (inferior_ptid)); |
| if (exec_file) |
| { |
| /* It's possible we don't have a full path, but rather just a |
| filename. Some targets, such as HP-UX, don't provide the |
| full path, sigh. |
| |
| Attempt to qualify the filename against the source path. |
| (If that fails, we'll just fall back on the original |
| filename. Not much more we can do...) |
| */ |
| if (!source_full_path_of (exec_file, &full_exec_path)) |
| full_exec_path = savestring (exec_file, strlen (exec_file)); |
| |
| exec_file_attach (full_exec_path, from_tty); |
| symbol_file_add_main (full_exec_path, from_tty); |
| } |
| } |
| |
| #ifdef SOLIB_ADD |
| /* Add shared library symbols from the newly attached process, if any. */ |
| SOLIB_ADD ((char *) 0, from_tty, ¤t_target, auto_solib_add); |
| re_enable_breakpoints_in_shlibs (); |
| #endif |
| |
| /* Take any necessary post-attaching actions for this platform. |
| */ |
| target_post_attach (PIDGET (inferior_ptid)); |
| |
| normal_stop (); |
| |
| if (attach_hook) |
| attach_hook (); |
| } |
| |
| /* |
| * detach_command -- |
| * takes a program previously attached to and detaches it. |
| * The program resumes execution and will no longer stop |
| * on signals, etc. We better not have left any breakpoints |
| * in the program or it'll die when it hits one. For this |
| * to work, it may be necessary for the process to have been |
| * previously attached. It *might* work if the program was |
| * started via the normal ptrace (PTRACE_TRACEME). |
| */ |
| |
| static void |
| detach_command (char *args, int from_tty) |
| { |
| dont_repeat (); /* Not for the faint of heart */ |
| target_detach (args, from_tty); |
| #if defined(SOLIB_RESTART) |
| SOLIB_RESTART (); |
| #endif |
| if (detach_hook) |
| detach_hook (); |
| } |
| |
| /* Stop the execution of the target while running in async mode, in |
| the backgound. */ |
| void |
| interrupt_target_command (char *args, int from_tty) |
| { |
| if (event_loop_p && target_can_async_p ()) |
| { |
| dont_repeat (); /* Not for the faint of heart */ |
| target_stop (); |
| } |
| } |
| |
| /* ARGSUSED */ |
| static void |
| print_float_info (struct gdbarch *gdbarch, struct ui_file *file, |
| struct frame_info *frame, const char *args) |
| { |
| if (!target_has_registers) |
| error ("The program has no registers now."); |
| if (deprecated_selected_frame == NULL) |
| error ("No selected frame."); |
| |
| if (gdbarch_print_float_info_p (gdbarch)) |
| gdbarch_print_float_info (gdbarch, file, frame, args); |
| else |
| { |
| int regnum; |
| int printed_something = 0; |
| |
| for (regnum = 0; regnum < NUM_REGS + NUM_PSEUDO_REGS; regnum++) |
| { |
| if (gdbarch_register_reggroup_p (gdbarch, regnum, float_reggroup)) |
| { |
| printed_something = 1; |
| gdbarch_print_registers_info (gdbarch, file, frame, regnum, 1); |
| } |
| } |
| if (!printed_something) |
| fprintf_filtered (file, "\ |
| No floating-point info available for this processor.\n"); |
| } |
| } |
| |
| static void |
| float_info (char *args, int from_tty) |
| { |
| print_float_info (current_gdbarch, gdb_stdout, deprecated_selected_frame, args); |
| } |
| |
| /* ARGSUSED */ |
| static void |
| unset_command (char *args, int from_tty) |
| { |
| printf_filtered ("\"unset\" must be followed by the name of "); |
| printf_filtered ("an unset subcommand.\n"); |
| help_list (unsetlist, "unset ", -1, gdb_stdout); |
| } |
| |
| void |
| _initialize_infcmd (void) |
| { |
| struct cmd_list_element *c; |
| |
| c = add_com ("tty", class_run, tty_command, |
| "Set terminal for future runs of program being debugged."); |
| set_cmd_completer (c, filename_completer); |
| |
| c = add_set_cmd ("args", class_run, var_string_noescape, |
| (char *) &inferior_args, |
| "Set argument list to give program being debugged when it is started.\n\ |
| Follow this command with any number of args, to be passed to the program.", |
| &setlist); |
| set_cmd_completer (c, filename_completer); |
| set_cmd_sfunc (c, notice_args_set); |
| c = add_show_from_set (c, &showlist); |
| set_cmd_sfunc (c, notice_args_read); |
| |
| c = add_cmd |
| ("environment", no_class, environment_info, |
| "The environment to give the program, or one variable's value.\n\ |
| With an argument VAR, prints the value of environment variable VAR to\n\ |
| give the program being debugged. With no arguments, prints the entire\n\ |
| environment to be given to the program.", &showlist); |
| set_cmd_completer (c, noop_completer); |
| |
| add_prefix_cmd ("unset", no_class, unset_command, |
| "Complement to certain \"set\" commands.", |
| &unsetlist, "unset ", 0, &cmdlist); |
| |
| c = add_cmd ("environment", class_run, unset_environment_command, |
| "Cancel environment variable VAR for the program.\n\ |
| This does not affect the program until the next \"run\" command.", |
| &unsetlist); |
| set_cmd_completer (c, noop_completer); |
| |
| c = add_cmd ("environment", class_run, set_environment_command, |
| "Set environment variable value to give the program.\n\ |
| Arguments are VAR VALUE where VAR is variable name and VALUE is value.\n\ |
| VALUES of environment variables are uninterpreted strings.\n\ |
| This does not affect the program until the next \"run\" command.", |
| &setlist); |
| set_cmd_completer (c, noop_completer); |
| |
| c = add_com ("path", class_files, path_command, |
| "Add directory DIR(s) to beginning of search path for object files.\n\ |
| $cwd in the path means the current working directory.\n\ |
| This path is equivalent to the $PATH shell variable. It is a list of\n\ |
| directories, separated by colons. These directories are searched to find\n\ |
| fully linked executable files and separately compiled object files as needed."); |
| set_cmd_completer (c, filename_completer); |
| |
| c = add_cmd ("paths", no_class, path_info, |
| "Current search path for finding object files.\n\ |
| $cwd in the path means the current working directory.\n\ |
| This path is equivalent to the $PATH shell variable. It is a list of\n\ |
| directories, separated by colons. These directories are searched to find\n\ |
| fully linked executable files and separately compiled object files as needed.", |
| &showlist); |
| set_cmd_completer (c, noop_completer); |
| |
| add_com ("attach", class_run, attach_command, |
| "Attach to a process or file outside of GDB.\n\ |
| This command attaches to another target, of the same type as your last\n\ |
| \"target\" command (\"info files\" will show your target stack).\n\ |
| The command may take as argument a process id or a device file.\n\ |
| For a process id, you must have permission to send the process a signal,\n\ |
| and it must have the same effective uid as the debugger.\n\ |
| When using \"attach\" with a process id, the debugger finds the\n\ |
| program running in the process, looking first in the current working\n\ |
| directory, or (if not found there) using the source file search path\n\ |
| (see the \"directory\" command). You can also use the \"file\" command\n\ |
| to specify the program, and to load its symbol table."); |
| |
| add_com ("detach", class_run, detach_command, |
| "Detach a process or file previously attached.\n\ |
| If a process, it is no longer traced, and it continues its execution. If\n\ |
| you were debugging a file, the file is closed and gdb no longer accesses it."); |
| |
| add_com ("signal", class_run, signal_command, |
| "Continue program giving it signal specified by the argument.\n\ |
| An argument of \"0\" means continue program without giving it a signal."); |
| |
| add_com ("stepi", class_run, stepi_command, |
| "Step one instruction exactly.\n\ |
| Argument N means do this N times (or till program stops for another reason)."); |
| add_com_alias ("si", "stepi", class_alias, 0); |
| |
| add_com ("nexti", class_run, nexti_command, |
| "Step one instruction, but proceed through subroutine calls.\n\ |
| Argument N means do this N times (or till program stops for another reason)."); |
| add_com_alias ("ni", "nexti", class_alias, 0); |
| |
| add_com ("finish", class_run, finish_command, |
| "Execute until selected stack frame returns.\n\ |
| Upon return, the value returned is printed and put in the value history."); |
| |
| add_com ("next", class_run, next_command, |
| "Step program, proceeding through subroutine calls.\n\ |
| Like the \"step\" command as long as subroutine calls do not happen;\n\ |
| when they do, the call is treated as one instruction.\n\ |
| Argument N means do this N times (or till program stops for another reason)."); |
| add_com_alias ("n", "next", class_run, 1); |
| if (xdb_commands) |
| add_com_alias ("S", "next", class_run, 1); |
| |
| add_com ("step", class_run, step_command, |
| "Step program until it reaches a different source line.\n\ |
| Argument N means do this N times (or till program stops for another reason)."); |
| add_com_alias ("s", "step", class_run, 1); |
| |
| c = add_com ("until", class_run, until_command, |
| "Execute until the program reaches a source line greater than the current\n\ |
| or a specified location (same args as break command) within the current frame."); |
| set_cmd_completer (c, location_completer); |
| add_com_alias ("u", "until", class_run, 1); |
| |
| c = add_com ("advance", class_run, advance_command, |
| "Continue the program up to the given location (same form as args for break command).\n\ |
| Execution will also stop upon exit from the current stack frame."); |
| set_cmd_completer (c, location_completer); |
| |
| c = add_com ("jump", class_run, jump_command, |
| "Continue program being debugged at specified line or address.\n\ |
| Give as argument either LINENUM or *ADDR, where ADDR is an expression\n\ |
| for an address to start at."); |
| set_cmd_completer (c, location_completer); |
| |
| if (xdb_commands) |
| { |
| c = add_com ("go", class_run, go_command, |
| "Usage: go <location>\n\ |
| Continue program being debugged, stopping at specified line or \n\ |
| address.\n\ |
| Give as argument either LINENUM or *ADDR, where ADDR is an \n\ |
| expression for an address to start at.\n\ |
| This command is a combination of tbreak and jump."); |
| set_cmd_completer (c, location_completer); |
| } |
| |
| if (xdb_commands) |
| add_com_alias ("g", "go", class_run, 1); |
| |
| add_com ("continue", class_run, continue_command, |
| "Continue program being debugged, after signal or breakpoint.\n\ |
| If proceeding from breakpoint, a number N may be used as an argument,\n\ |
| which means to set the ignore count of that breakpoint to N - 1 (so that\n\ |
| the breakpoint won't break until the Nth time it is reached)."); |
| add_com_alias ("c", "cont", class_run, 1); |
| add_com_alias ("fg", "cont", class_run, 1); |
| |
| c = add_com ("run", class_run, run_command, |
| "Start debugged program. You may specify arguments to give it.\n\ |
| Args may include \"*\", or \"[...]\"; they are expanded using \"sh\".\n\ |
| Input and output redirection with \">\", \"<\", or \">>\" are also allowed.\n\n\ |
| With no arguments, uses arguments last specified (with \"run\" or \"set args\").\n\ |
| To cancel previous arguments and run with no arguments,\n\ |
| use \"set args\" without arguments."); |
| set_cmd_completer (c, filename_completer); |
| add_com_alias ("r", "run", class_run, 1); |
| if (xdb_commands) |
| add_com ("R", class_run, run_no_args_command, |
| "Start debugged program with no arguments."); |
| |
| add_com ("interrupt", class_run, interrupt_target_command, |
| "Interrupt the execution of the debugged program."); |
| |
| add_info ("registers", nofp_registers_info, |
| "List of integer registers and their contents, for selected stack frame.\n\ |
| Register name as argument means describe only that register."); |
| add_info_alias ("r", "registers", 1); |
| |
| if (xdb_commands) |
| add_com ("lr", class_info, nofp_registers_info, |
| "List of integer registers and their contents, for selected stack frame.\n\ |
| Register name as argument means describe only that register."); |
| add_info ("all-registers", all_registers_info, |
| "List of all registers and their contents, for selected stack frame.\n\ |
| Register name as argument means describe only that register."); |
| |
| add_info ("program", program_info, |
| "Execution status of the program."); |
| |
| add_info ("float", float_info, |
| "Print the status of the floating point unit\n"); |
| |
| add_info ("vector", vector_info, |
| "Print the status of the vector unit\n"); |
| |
| inferior_environ = make_environ (); |
| init_environ (inferior_environ); |
| } |