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Diffstat (limited to 'gdb/breakpoint.c')
-rw-r--r-- | gdb/breakpoint.c | 1373 |
1 files changed, 0 insertions, 1373 deletions
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c deleted file mode 100644 index 0cffc45..0000000 --- a/gdb/breakpoint.c +++ /dev/null @@ -1,1373 +0,0 @@ -/* Everything about breakpoints, for GDB. - Copyright (C) 1986, 1987, 1989 Free Software Foundation, Inc. - -This file is part of GDB. - -GDB 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 1, or (at your option) -any later version. - -GDB 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 GDB; see the file COPYING. If not, write to -the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ - -#include <stdio.h> -#include "defs.h" -#include "param.h" -#include "symtab.h" -#include "frame.h" - -/* This is the sequence of bytes we insert for a breakpoint. */ - -static char break_insn[] = BREAKPOINT; - -/* States of enablement of breakpoint. - `temporary' means disable when hit. - `delete' means delete when hit. */ - -enum enable { disabled, enabled, temporary, delete}; - -/* Not that the ->silent field is not currently used by any commands - (though the code is in there if it was to be and set_raw_breakpoint - does set it to 0). I implemented it because I thought it would be - useful for a hack I had to put in; I'm going to leave it in because - I can see how there might be times when it would indeed be useful */ - -struct breakpoint -{ - struct breakpoint *next; - /* Number assigned to distinguish breakpoints. */ - int number; - /* Address to break at. */ - CORE_ADDR address; - /* Line number of this address. Redundant. */ - int line_number; - /* Symtab of file of this address. Redundant. */ - struct symtab *symtab; - /* Zero means disabled; remember the info but don't break here. */ - enum enable enable; - /* Non-zero means a silent breakpoint (don't print frame info - if we stop here). */ - unsigned char silent; - /* Number of stops at this breakpoint that should - be continued automatically before really stopping. */ - int ignore_count; - /* "Real" contents of byte where breakpoint has been inserted. - Valid only when breakpoints are in the program. */ - char shadow_contents[sizeof break_insn]; - /* Nonzero if this breakpoint is now inserted. */ - char inserted; - /* Nonzero if this is not the first breakpoint in the list - for the given address. */ - char duplicate; - /* Chain of command lines to execute when this breakpoint is hit. */ - struct command_line *commands; - /* Stack depth (address of frame). If nonzero, break only if fp - equals this. */ - FRAME_ADDR frame; - /* Conditional. Break only if this expression's value is nonzero. */ - struct expression *cond; -}; - -#define ALL_BREAKPOINTS(b) for (b = breakpoint_chain; b; b = b->next) - -/* Chain of all breakpoints defined. */ - -struct breakpoint *breakpoint_chain; - -/* Number of last breakpoint made. */ - -static int breakpoint_count; - -/* Default address, symtab and line to put a breakpoint at - for "break" command with no arg. - if default_breakpoint_valid is zero, the other three are - not valid, and "break" with no arg is an error. - - This set by print_stack_frame, which calls set_default_breakpoint. */ - -int default_breakpoint_valid; -CORE_ADDR default_breakpoint_address; -struct symtab *default_breakpoint_symtab; -int default_breakpoint_line; - -/* Remaining commands (not yet executed) - of last breakpoint hit. */ - -struct command_line *breakpoint_commands; - -static void delete_breakpoint (); -void clear_momentary_breakpoints (); -void breakpoint_auto_delete (); - -/* Flag indicating extra verbosity for xgdb. */ -extern int xgdb_verbose; - -/* condition N EXP -- set break condition of breakpoint N to EXP. */ - -static void -condition_command (arg, from_tty) - char *arg; - int from_tty; -{ - register struct breakpoint *b; - register char *p; - register int bnum; - register struct expression *expr; - - if (arg == 0) - error_no_arg ("breakpoint number"); - - p = arg; - while (*p >= '0' && *p <= '9') p++; - if (p == arg) - /* There is no number here. (e.g. "cond a == b"). */ - error_no_arg ("breakpoint number"); - bnum = atoi (arg); - - ALL_BREAKPOINTS (b) - if (b->number == bnum) - { - if (b->cond) - free (b->cond); - if (*p == 0) - { - b->cond = 0; - if (from_tty) - printf ("Breakpoint %d now unconditional.\n", bnum); - } - else - { - if (*p != ' ' && *p != '\t') - error ("Arguments must be an integer (breakpoint number) and an expression."); - - /* Find start of expression */ - while (*p == ' ' || *p == '\t') p++; - - arg = p; - b->cond = (struct expression *) parse_c_1 (&arg, block_for_pc (b->address), 0); - if (*arg) - error ("Junk at end of expression"); - } - return; - } - - error ("No breakpoint number %d.", bnum); -} - -static void -commands_command (arg) - char *arg; -{ - register struct breakpoint *b; - register char *p, *p1; - register int bnum; - struct command_line *l; - - /* If we allowed this, we would have problems with when to - free the storage, if we change the commands currently - being read from. */ - - if (breakpoint_commands) - error ("Can't use the \"commands\" command among a breakpoint's commands."); - - /* Allow commands by itself to refer to the last breakpoint. */ - if (arg == 0) - bnum = breakpoint_count; - else - { - p = arg; - if (! (*p >= '0' && *p <= '9')) - error ("Argument must be integer (a breakpoint number)."); - - while (*p >= '0' && *p <= '9') p++; - if (*p) - error ("Unexpected extra arguments following breakpoint number."); - - bnum = atoi (arg); - } - - ALL_BREAKPOINTS (b) - if (b->number == bnum) - { - if (input_from_terminal_p ()) - { - printf ("Type commands for when breakpoint %d is hit, one per line.\n\ -End with a line saying just \"end\".\n", bnum); - fflush (stdout); - } - l = read_command_lines (); - free_command_lines (&b->commands); - b->commands = l; - return; - } - error ("No breakpoint number %d.", bnum); -} - -/* Called from command loop to execute the commands - associated with the breakpoint we just stopped at. */ - -void -do_breakpoint_commands () -{ - while (breakpoint_commands) - { - char *line = breakpoint_commands->line; - breakpoint_commands = breakpoint_commands->next; - execute_command (line, 0); - /* If command was "cont", breakpoint_commands is now 0, - of if we stopped at yet another breakpoint which has commands, - it is now the commands for the new breakpoint. */ - } - clear_momentary_breakpoints (); -} - -/* Used when the program is proceeded, to eliminate any remaining - commands attached to the previous breakpoint we stopped at. */ - -void -clear_breakpoint_commands () -{ - breakpoint_commands = 0; - breakpoint_auto_delete (0); -} - -/* Functions to get and set the current list of pending - breakpoint commands. These are used by run_stack_dummy - to preserve the commands around a function call. */ - -struct command_line * -get_breakpoint_commands () -{ - return breakpoint_commands; -} - -void -set_breakpoint_commands (cmds) - struct command_line *cmds; -{ - breakpoint_commands = cmds; -} - -/* insert_breakpoints is used when starting or continuing the program. - remove_breakpoints is used when the program stops. - Both return zero if successful, - or an `errno' value if could not write the inferior. */ - -int -insert_breakpoints () -{ - register struct breakpoint *b; - int val; - -#ifdef BREAKPOINT_DEBUG - printf ("Inserting breakpoints.\n"); -#endif /* BREAKPOINT_DEBUG */ - - ALL_BREAKPOINTS (b) - if (b->enable != disabled && ! b->inserted && ! b->duplicate) - { - read_memory (b->address, b->shadow_contents, sizeof break_insn); - val = write_memory (b->address, break_insn, sizeof break_insn); - if (val) - return val; -#ifdef BREAKPOINT_DEBUG - printf ("Inserted breakpoint at 0x%x, shadow 0x%x, 0x%x.\n", - b->address, b->shadow_contents[0], b->shadow_contents[1]); -#endif /* BREAKPOINT_DEBUG */ - b->inserted = 1; - } - return 0; -} - -int -remove_breakpoints () -{ - register struct breakpoint *b; - int val; - -#ifdef BREAKPOINT_DEBUG - printf ("Removing breakpoints.\n"); -#endif /* BREAKPOINT_DEBUG */ - - ALL_BREAKPOINTS (b) - if (b->inserted) - { - val = write_memory (b->address, b->shadow_contents, sizeof break_insn); - if (val) - return val; - b->inserted = 0; -#ifdef BREAKPOINT_DEBUG - printf ("Removed breakpoint at 0x%x, shadow 0x%x, 0x%x.\n", - b->address, b->shadow_contents[0], b->shadow_contents[1]); -#endif /* BREAKPOINT_DEBUG */ - } - - return 0; -} - -/* Clear the "inserted" flag in all breakpoints. - This is done when the inferior is loaded. */ - -void -mark_breakpoints_out () -{ - register struct breakpoint *b; - - ALL_BREAKPOINTS (b) - b->inserted = 0; -} - -/* breakpoint_here_p (PC) returns 1 if an enabled breakpoint exists at PC. - When continuing from a location with a breakpoint, - we actually single step once before calling insert_breakpoints. */ - -int -breakpoint_here_p (pc) - CORE_ADDR pc; -{ - register struct breakpoint *b; - - ALL_BREAKPOINTS (b) - if (b->enable != disabled && b->address == pc) - return 1; - - return 0; -} - -/* Evaluate the expression EXP and return 1 if value is zero. - This is used inside a catch_errors to evaluate the breakpoint condition. */ - -int -breakpoint_cond_eval (exp) - struct expression *exp; -{ - return value_zerop (evaluate_expression (exp)); -} - -/* Return 0 if PC is not the address just after a breakpoint, - or -1 if breakpoint says do not stop now, - or -2 if breakpoint says it has deleted itself and don't stop, - or -3 if hit a breakpoint number -3 (delete when program stops), - or else the number of the breakpoint, - with 0x1000000 added (or subtracted, for a negative return value) for - a silent breakpoint. */ - -int -breakpoint_stop_status (pc, frame_address) - CORE_ADDR pc; - FRAME_ADDR frame_address; -{ - register struct breakpoint *b; - register int cont = 0; - - /* Get the address where the breakpoint would have been. */ - pc -= DECR_PC_AFTER_BREAK; - - ALL_BREAKPOINTS (b) - if (b->enable != disabled && b->address == pc) - { - if (b->frame && b->frame != frame_address) - cont = -1; - else - { - int value_zero; - if (b->cond) - { - /* Need to select the frame, with all that implies - so that the conditions will have the right context. */ - select_frame (get_current_frame (), 0); - value_zero - = catch_errors (breakpoint_cond_eval, b->cond, - "Error occurred in testing breakpoint condition."); - free_all_values (); - } - if (b->cond && value_zero) - { - cont = -1; - } - else if (b->ignore_count > 0) - { - b->ignore_count--; - cont = -1; - } - else - { - if (b->enable == temporary) - b->enable = disabled; - breakpoint_commands = b->commands; - if (b->silent - || (breakpoint_commands - && !strcmp ("silent", breakpoint_commands->line))) - { - if (breakpoint_commands) - breakpoint_commands = breakpoint_commands->next; - return (b->number > 0 ? - 0x1000000 + b->number : - b->number - 0x1000000); - } - return b->number; - } - } - } - - return cont; -} - -static void -breakpoint_1 (bnum) - int bnum; -{ - register struct breakpoint *b; - register struct command_line *l; - register struct symbol *sym; - CORE_ADDR last_addr = (CORE_ADDR)-1; - - ALL_BREAKPOINTS (b) - if (bnum == -1 || bnum == b->number) - { - printf_filtered ("#%-3d %c 0x%08x ", b->number, - "nyod"[(int) b->enable], - b->address); - last_addr = b->address; - if (b->symtab) - { - sym = find_pc_function (b->address); - if (sym) - printf_filtered (" in %s (%s line %d)", SYMBOL_NAME (sym), - b->symtab->filename, b->line_number); - else - printf_filtered ("%s line %d", b->symtab->filename, b->line_number); - } - else - { - char *name; - int addr; - - if (find_pc_partial_function (b->address, &name, &addr)) - { - if (b->address - addr) - printf_filtered ("<%s+%d>", name, b->address - addr); - else - printf_filtered ("<%s>", name); - } - } - - printf_filtered ("\n"); - - if (b->ignore_count) - printf_filtered ("\tignore next %d hits\n", b->ignore_count); - if (b->frame) - printf_filtered ("\tstop only in stack frame at 0x%x\n", b->frame); - if (b->cond) - { - printf_filtered ("\tbreak only if "); - print_expression (b->cond, stdout); - printf_filtered ("\n"); - } - if (l = b->commands) - while (l) - { - printf_filtered ("\t%s\n", l->line); - l = l->next; - } - } - - /* Compare against (CORE_ADDR)-1 in case some compiler decides - that a comparison of an unsigned with -1 is always false. */ - if (last_addr != (CORE_ADDR)-1) - set_next_address (last_addr); -} - -static void -breakpoints_info (bnum_exp) - char *bnum_exp; -{ - int bnum = -1; - - if (bnum_exp) - bnum = parse_and_eval_address (bnum_exp); - else if (breakpoint_chain == 0) - printf_filtered ("No breakpoints.\n"); - else - printf_filtered ("Breakpoints:\n\ -Num Enb Address Where\n"); - - breakpoint_1 (bnum); -} - -/* Print a message describing any breakpoints set at PC. */ - -static void -describe_other_breakpoints (pc) - register CORE_ADDR pc; -{ - register int others = 0; - register struct breakpoint *b; - - ALL_BREAKPOINTS (b) - if (b->address == pc) - others++; - if (others > 0) - { - printf ("Note: breakpoint%s ", (others > 1) ? "s" : ""); - ALL_BREAKPOINTS (b) - if (b->address == pc) - { - others--; - printf ("%d%s%s ", - b->number, - (b->enable == disabled) ? " (disabled)" : "", - (others > 1) ? "," : ((others == 1) ? " and" : "")); - } - printf ("also set at pc 0x%x.\n", pc); - } -} - -/* Set the default place to put a breakpoint - for the `break' command with no arguments. */ - -void -set_default_breakpoint (valid, addr, symtab, line) - int valid; - CORE_ADDR addr; - struct symtab *symtab; - int line; -{ - default_breakpoint_valid = valid; - default_breakpoint_address = addr; - default_breakpoint_symtab = symtab; - default_breakpoint_line = line; -} - -/* Rescan breakpoints at address ADDRESS, - marking the first one as "first" and any others as "duplicates". - This is so that the bpt instruction is only inserted once. */ - -static void -check_duplicates (address) - CORE_ADDR address; -{ - register struct breakpoint *b; - register int count = 0; - - ALL_BREAKPOINTS (b) - if (b->enable != disabled && b->address == address) - { - count++; - b->duplicate = count > 1; - } -} - -/* Low level routine to set a breakpoint. - Takes as args the three things that every breakpoint must have. - Returns the breakpoint object so caller can set other things. - Does not set the breakpoint number! - Does not print anything. */ - -static struct breakpoint * -set_raw_breakpoint (sal) - struct symtab_and_line sal; -{ - register struct breakpoint *b, *b1; - - b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint)); - bzero (b, sizeof *b); - b->address = sal.pc; - b->symtab = sal.symtab; - b->line_number = sal.line; - b->enable = enabled; - b->next = 0; - b->silent = 0; - - /* Add this breakpoint to the end of the chain - so that a list of breakpoints will come out in order - of increasing numbers. */ - - b1 = breakpoint_chain; - if (b1 == 0) - breakpoint_chain = b; - else - { - while (b1->next) - b1 = b1->next; - b1->next = b; - } - - check_duplicates (sal.pc); - - return b; -} - -/* Set a breakpoint that will evaporate an end of command - at address specified by SAL. - Restrict it to frame FRAME if FRAME is nonzero. */ - -void -set_momentary_breakpoint (sal, frame) - struct symtab_and_line sal; - FRAME frame; -{ - register struct breakpoint *b; - b = set_raw_breakpoint (sal); - b->number = -3; - b->enable = delete; - b->frame = (frame ? FRAME_FP (frame) : 0); -} - -void -clear_momentary_breakpoints () -{ - register struct breakpoint *b; - ALL_BREAKPOINTS (b) - if (b->number == -3) - { - delete_breakpoint (b); - break; - } -} - -/* Set a breakpoint from a symtab and line. - If TEMPFLAG is nonzero, it is a temporary breakpoint. - Print the same confirmation messages that the breakpoint command prints. */ - -void -set_breakpoint (s, line, tempflag) - struct symtab *s; - int line; - int tempflag; -{ - register struct breakpoint *b; - struct symtab_and_line sal; - - sal.symtab = s; - sal.line = line; - sal.pc = find_line_pc (sal.symtab, sal.line); - if (sal.pc == 0) - error ("No line %d in file \"%s\".\n", sal.line, sal.symtab->filename); - else - { - describe_other_breakpoints (sal.pc); - - b = set_raw_breakpoint (sal); - b->number = ++breakpoint_count; - b->cond = 0; - if (tempflag) - b->enable = temporary; - - printf ("Breakpoint %d at 0x%x", b->number, b->address); - if (b->symtab) - printf (": file %s, line %d.", b->symtab->filename, b->line_number); - printf ("\n"); - } -} - -/* Set a breakpoint according to ARG (function, linenum or *address) - and make it temporary if TEMPFLAG is nonzero. */ - -static void -break_command_1 (arg, tempflag, from_tty) - char *arg; - int tempflag, from_tty; -{ - struct symtabs_and_lines sals; - struct symtab_and_line sal; - register struct expression *cond = 0; - register struct breakpoint *b; - char *save_arg; - int i; - CORE_ADDR pc; - - sals.sals = NULL; - sals.nelts = 0; - - sal.line = sal.pc = sal.end = 0; - sal.symtab = 0; - - /* If no arg given, or if first arg is 'if ', use the default breakpoint. */ - - if (!arg || (arg[0] == 'i' && arg[1] == 'f' - && (arg[2] == ' ' || arg[2] == '\t'))) - { - if (default_breakpoint_valid) - { - sals.sals = (struct symtab_and_line *) - malloc (sizeof (struct symtab_and_line)); - sal.pc = default_breakpoint_address; - sal.line = default_breakpoint_line; - sal.symtab = default_breakpoint_symtab; - sals.sals[0] = sal; - sals.nelts = 1; - } - else - error ("No default breakpoint address now."); - } - else - /* Force almost all breakpoints to be in terms of the - current_source_symtab (which is decode_line_1's default). This - should produce the results we want almost all of the time while - leaving default_breakpoint_* alone. */ - if (default_breakpoint_valid - && (!current_source_symtab - || (arg && (*arg == '+' || *arg == '-')))) - sals = decode_line_1 (&arg, 1, default_breakpoint_symtab, - default_breakpoint_line); - else - sals = decode_line_1 (&arg, 1, 0, 0); - - if (! sals.nelts) - return; - - save_arg = arg; - for (i = 0; i < sals.nelts; i++) - { - sal = sals.sals[i]; - if (sal.pc == 0 && sal.symtab != 0) - { - pc = find_line_pc (sal.symtab, sal.line); - if (pc == 0) - error ("No line %d in file \"%s\".", - sal.line, sal.symtab->filename); - } - else - pc = sal.pc; - - while (arg && *arg) - { - if (arg[0] == 'i' && arg[1] == 'f' - && (arg[2] == ' ' || arg[2] == '\t')) - cond = (struct expression *) parse_c_1 ((arg += 2, &arg), - block_for_pc (pc), 0); - else - error ("Junk at end of arguments."); - } - arg = save_arg; - sals.sals[i].pc = pc; - } - - for (i = 0; i < sals.nelts; i++) - { - sal = sals.sals[i]; - - if (from_tty) - describe_other_breakpoints (sal.pc); - - b = set_raw_breakpoint (sal); - b->number = ++breakpoint_count; - b->cond = cond; - if (tempflag) - b->enable = temporary; - - printf ("Breakpoint %d at 0x%x", b->number, b->address); - if (b->symtab) - printf (": file %s, line %d.", b->symtab->filename, b->line_number); - printf ("\n"); - } - - if (sals.nelts > 1) - { - printf ("Multiple breakpoints were set.\n"); - printf ("Use the \"delete\" command to delete unwanted breakpoints.\n"); - } - free (sals.sals); -} - -static void -break_command (arg, from_tty) - char *arg; - int from_tty; -{ - break_command_1 (arg, 0, from_tty); -} - -static void -tbreak_command (arg, from_tty) - char *arg; - int from_tty; -{ - break_command_1 (arg, 1, from_tty); -} - -/* - * Helper routine for the until_command routine in infcmd.c. Here - * because it uses the mechanisms of breakpoints. - */ -void -until_break_command (arg, from_tty) - char *arg; - int from_tty; -{ - struct symtabs_and_lines sals; - struct symtab_and_line sal; - FRAME prev_frame = get_prev_frame (selected_frame); - - clear_proceed_status (); - - /* Set a breakpoint where the user wants it and at return from - this function */ - - if (default_breakpoint_valid) - sals = decode_line_1 (&arg, 1, default_breakpoint_symtab, - default_breakpoint_line); - else - sals = decode_line_1 (&arg, 1, 0, 0); - - if (sals.nelts != 1) - error ("Couldn't get information on specified line."); - - sal = sals.sals[0]; - free (sals.sals); /* malloc'd, so freed */ - - if (*arg) - error ("Junk at end of arguments."); - - if (sal.pc == 0 && sal.symtab != 0) - sal.pc = find_line_pc (sal.symtab, sal.line); - - if (sal.pc == 0) - error ("No line %d in file \"%s\".", sal.line, sal.symtab->filename); - - set_momentary_breakpoint (sal, selected_frame); - - /* Keep within the current frame */ - - if (prev_frame) - { - struct frame_info *fi; - - fi = get_frame_info (prev_frame); - sal = find_pc_line (fi->pc, 0); - sal.pc = fi->pc; - set_momentary_breakpoint (sal, prev_frame); - } - - proceed (-1, -1, 0); -} - -static void -clear_command (arg, from_tty) - char *arg; - int from_tty; -{ - register struct breakpoint *b, *b1; - struct symtabs_and_lines sals; - struct symtab_and_line sal; - register struct breakpoint *found; - int i; - - if (arg) - { - sals = decode_line_spec (arg, 1); - } - else - { - sals.sals = (struct symtab_and_line *) malloc (sizeof (struct symtab_and_line)); - sal.line = default_breakpoint_line; - sal.symtab = default_breakpoint_symtab; - sal.pc = 0; - if (sal.symtab == 0) - error ("No source file specified."); - - sals.sals[0] = sal; - sals.nelts = 1; - } - - for (i = 0; i < sals.nelts; i++) - { - /* If exact pc given, clear bpts at that pc. - But if sal.pc is zero, clear all bpts on specified line. */ - sal = sals.sals[i]; - found = (struct breakpoint *) 0; - while (breakpoint_chain - && (sal.pc ? breakpoint_chain->address == sal.pc - : (breakpoint_chain->symtab == sal.symtab - && breakpoint_chain->line_number == sal.line))) - { - b1 = breakpoint_chain; - breakpoint_chain = b1->next; - b1->next = found; - found = b1; - } - - ALL_BREAKPOINTS (b) - while (b->next - && (sal.pc ? b->next->address == sal.pc - : (b->next->symtab == sal.symtab - && b->next->line_number == sal.line))) - { - b1 = b->next; - b->next = b1->next; - b1->next = found; - found = b1; - } - - if (found == 0) - error ("No breakpoint at %s.", arg); - - if (found->next) from_tty = 1; /* Always report if deleted more than one */ - if (from_tty) printf ("Deleted breakpoint%s ", found->next ? "s" : ""); - while (found) - { - if (from_tty) printf ("%d ", found->number); - b1 = found->next; - delete_breakpoint (found); - found = b1; - } - if (from_tty) putchar ('\n'); - } - free (sals.sals); -} - -/* Delete breakpoint number BNUM if it is a `delete' breakpoint. - This is called after breakpoint BNUM has been hit. - Also delete any breakpoint numbered -3 unless there are breakpoint - commands to be executed. */ - -void -breakpoint_auto_delete (bnum) - int bnum; -{ - register struct breakpoint *b; - if (bnum != 0) - ALL_BREAKPOINTS (b) - if (b->number == bnum) - { - if (b->enable == delete) - delete_breakpoint (b); - break; - } - if (breakpoint_commands == 0) - clear_momentary_breakpoints (); -} - -static void -delete_breakpoint (bpt) - struct breakpoint *bpt; -{ - register struct breakpoint *b; - - if (bpt->inserted) - write_memory (bpt->address, bpt->shadow_contents, sizeof break_insn); - - if (breakpoint_chain == bpt) - breakpoint_chain = bpt->next; - - ALL_BREAKPOINTS (b) - if (b->next == bpt) - { - b->next = bpt->next; - break; - } - - check_duplicates (bpt->address); - - free_command_lines (&bpt->commands); - if (bpt->cond) - free (bpt->cond); - - if (xgdb_verbose && bpt->number >=0) - printf ("breakpoint #%d deleted\n", bpt->number); - - free (bpt); -} - -static void map_breakpoint_numbers (); - -static void -delete_command (arg, from_tty) - char *arg; - int from_tty; -{ - register struct breakpoint *b, *b1; - - if (arg == 0) - { - /* Ask user only if there are some breakpoints to delete. */ - if (!from_tty - || breakpoint_chain && query ("Delete all breakpoints? ")) - { - /* No arg; clear all breakpoints. */ - while (breakpoint_chain) - delete_breakpoint (breakpoint_chain); - } - } - else - map_breakpoint_numbers (arg, delete_breakpoint); -} - -/* Delete all breakpoints. - Done when new symtabs are loaded, since the break condition expressions - may become invalid, and the breakpoints are probably wrong anyway. */ - -void -clear_breakpoints () -{ - delete_command (0, 0); -} - -/* Set ignore-count of breakpoint number BPTNUM to COUNT. - If from_tty is nonzero, it prints a message to that effect, - which ends with a period (no newline). */ - -void -set_ignore_count (bptnum, count, from_tty) - int bptnum, count, from_tty; -{ - register struct breakpoint *b; - - if (count < 0) - count = 0; - - ALL_BREAKPOINTS (b) - if (b->number == bptnum) - { - b->ignore_count = count; - if (!from_tty) - return; - else if (count == 0) - printf ("Will stop next time breakpoint %d is reached.", bptnum); - else if (count == 1) - printf ("Will ignore next crossing of breakpoint %d.", bptnum); - else - printf ("Will ignore next %d crossings of breakpoint %d.", - count, bptnum); - return; - } - - error ("No breakpoint number %d.", bptnum); -} - -/* Clear the ignore counts of all breakpoints. */ -void -breakpoint_clear_ignore_counts () -{ - struct breakpoint *b; - - ALL_BREAKPOINTS (b) - b->ignore_count = 0; -} - -/* Command to set ignore-count of breakpoint N to COUNT. */ - -static void -ignore_command (args, from_tty) - char *args; - int from_tty; -{ - register char *p = args; - register int num; - - if (p == 0) - error_no_arg ("a breakpoint number"); - - while (*p >= '0' && *p <= '9') p++; - if (*p && *p != ' ' && *p != '\t') - error ("First argument must be a breakpoint number."); - - num = atoi (args); - - if (*p == 0) - error ("Second argument (specified ignore-count) is missing."); - - set_ignore_count (num, parse_and_eval_address (p), from_tty); - printf ("\n"); -} - -/* Call FUNCTION on each of the breakpoints - whose numbers are given in ARGS. */ - -static void -map_breakpoint_numbers (args, function) - char *args; - void (*function) (); -{ - register char *p = args; - register char *p1; - register int num; - register struct breakpoint *b; - - if (p == 0) - error_no_arg ("one or more breakpoint numbers"); - - while (*p) - { - p1 = p; - while (*p1 >= '0' && *p1 <= '9') p1++; - if (*p1 && *p1 != ' ' && *p1 != '\t') - error ("Arguments must be breakpoint numbers."); - - num = atoi (p); - - ALL_BREAKPOINTS (b) - if (b->number == num) - { - function (b); - goto win; - } - printf ("No breakpoint number %d.\n", num); - win: - p = p1; - while (*p == ' ' || *p == '\t') p++; - } -} - -static void -enable_breakpoint (bpt) - struct breakpoint *bpt; -{ - bpt->enable = enabled; - - if (xgdb_verbose && bpt->number >= 0) - printf ("breakpoint #%d enabled\n", bpt->number); - - check_duplicates (bpt->address); -} - -static void -enable_command (args) - char *args; -{ - struct breakpoint *bpt; - if (args == 0) - ALL_BREAKPOINTS (bpt) - enable_breakpoint (bpt); - else - map_breakpoint_numbers (args, enable_breakpoint); -} - -static void -disable_breakpoint (bpt) - struct breakpoint *bpt; -{ - bpt->enable = disabled; - - if (xgdb_verbose && bpt->number >= 0) - printf ("breakpoint #%d disabled\n", bpt->number); - - check_duplicates (bpt->address); -} - -static void -disable_command (args) - char *args; -{ - register struct breakpoint *bpt; - if (args == 0) - ALL_BREAKPOINTS (bpt) - disable_breakpoint (bpt); - else - map_breakpoint_numbers (args, disable_breakpoint); -} - -static void -enable_once_breakpoint (bpt) - struct breakpoint *bpt; -{ - bpt->enable = temporary; - - check_duplicates (bpt->address); -} - -static void -enable_once_command (args) - char *args; -{ - map_breakpoint_numbers (args, enable_once_breakpoint); -} - -static void -enable_delete_breakpoint (bpt) - struct breakpoint *bpt; -{ - bpt->enable = delete; - - check_duplicates (bpt->address); -} - -static void -enable_delete_command (args) - char *args; -{ - map_breakpoint_numbers (args, enable_delete_breakpoint); -} - -/* - * Use default_breakpoint_'s, or nothing if they aren't valid. - */ -struct symtabs_and_lines -decode_line_spec_1 (string, funfirstline) - char *string; - int funfirstline; -{ - struct symtabs_and_lines sals; - if (string == 0) - error ("Empty line specification."); - if (default_breakpoint_valid) - sals = decode_line_1 (&string, funfirstline, - default_breakpoint_symtab, default_breakpoint_line); - else - sals = decode_line_1 (&string, funfirstline, 0, 0); - if (*string) - error ("Junk at end of line specification: %s", string); - return sals; -} - - -/* Chain containing all defined enable commands. */ - -extern struct cmd_list_element - *enablelist, *disablelist, - *deletelist, *enablebreaklist; - -extern struct cmd_list_element *cmdlist; - -void -_initialize_breakpoint () -{ - breakpoint_chain = 0; - breakpoint_count = 0; - - add_com ("ignore", class_breakpoint, ignore_command, - "Set ignore-count of breakpoint number N to COUNT."); - - add_com ("commands", class_breakpoint, commands_command, - "Set commands to be executed when a breakpoint is hit.\n\ -Give breakpoint number as argument after \"commands\".\n\ -With no argument, the targeted breakpoint is the last one set.\n\ -The commands themselves follow starting on the next line.\n\ -Type a line containing \"end\" to indicate the end of them.\n\ -Give \"silent\" as the first line to make the breakpoint silent;\n\ -then no output is printed when it is hit, except what the commands print."); - - add_com ("condition", class_breakpoint, condition_command, - "Specify breakpoint number N to break only if COND is true.\n\ -N is an integer; COND is a C expression to be evaluated whenever\n\ -breakpoint N is reached. Actually break only when COND is nonzero."); - - add_com ("tbreak", class_breakpoint, tbreak_command, - "Set a temporary breakpoint. Args like \"break\" command.\n\ -Like \"break\" except the breakpoint is only enabled temporarily,\n\ -so it will be disabled when hit. Equivalent to \"break\" followed\n\ -by using \"enable once\" on the breakpoint number."); - - add_prefix_cmd ("enable", class_breakpoint, enable_command, - "Enable some breakpoints or auto-display expressions.\n\ -Give breakpoint numbers (separated by spaces) as arguments.\n\ -With no subcommand, breakpoints are enabled until you command otherwise.\n\ -This is used to cancel the effect of the \"disable\" command.\n\ -With a subcommand you can enable temporarily.\n\ -\n\ -The \"display\" subcommand applies to auto-displays instead of breakpoints.", - &enablelist, "enable ", 1, &cmdlist); - - add_abbrev_prefix_cmd ("breakpoints", class_breakpoint, enable_command, - "Enable some breakpoints or auto-display expressions.\n\ -Give breakpoint numbers (separated by spaces) as arguments.\n\ -With no subcommand, breakpoints are enabled until you command otherwise.\n\ -This is used to cancel the effect of the \"disable\" command.\n\ -May be abbreviates to simply \"enable\".\n\ -With a subcommand you can enable temporarily.", - &enablebreaklist, "enable breakpoints ", 1, &enablelist); - - add_cmd ("once", no_class, enable_once_command, - "Enable breakpoints for one hit. Give breakpoint numbers.\n\ -If a breakpoint is hit while enabled in this fashion, it becomes disabled.\n\ -See the \"tbreak\" command which sets a breakpoint and enables it once.", - &enablebreaklist); - - add_cmd ("delete", no_class, enable_delete_command, - "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ -If a breakpoint is hit while enabled in this fashion, it is deleted.", - &enablebreaklist); - - add_cmd ("delete", no_class, enable_delete_command, - "Enable breakpoints and delete when hit. Give breakpoint numbers.\n\ -If a breakpoint is hit while enabled in this fashion, it is deleted.", - &enablelist); - - add_cmd ("once", no_class, enable_once_command, - "Enable breakpoints for one hit. Give breakpoint numbers.\n\ -If a breakpoint is hit while enabled in this fashion, it becomes disabled.\n\ -See the \"tbreak\" command which sets a breakpoint and enables it once.", - &enablelist); - - add_prefix_cmd ("disable", class_breakpoint, disable_command, - "Disable some breakpoints or auto-display expressions.\n\ -Arguments are breakpoint numbers with spaces in between.\n\ -To disable all breakpoints, give no argument.\n\ -A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\ -\n\ -The \"display\" subcommand applies to auto-displays instead of breakpoints.", - &disablelist, "disable ", 1, &cmdlist); - add_com_alias ("dis", "disable", class_breakpoint, 1); - add_com_alias ("disa", "disable", class_breakpoint, 1); - - add_abbrev_cmd ("breakpoints", class_breakpoint, disable_command, - "Disable some breakpoints or auto-display expressions.\n\ -Arguments are breakpoint numbers with spaces in between.\n\ -To disable all breakpoints, give no argument.\n\ -A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\ -This command may be abbreviated \"disable\".", - &disablelist); - - add_prefix_cmd ("delete", class_breakpoint, delete_command, - "Delete some breakpoints or auto-display expressions.\n\ -Arguments are breakpoint numbers with spaces in between.\n\ -To delete all breakpoints, give no argument.\n\ -\n\ -Also a prefix command for deletion of other GDB objects.\n\ -The \"unset\" command is also an alias for \"delete\".", - &deletelist, "delete ", 1, &cmdlist); - add_com_alias ("d", "delete", class_breakpoint, 1); - add_com_alias ("unset", "delete", class_alias, 1); - - add_cmd ("breakpoints", class_alias, delete_command, - "Delete some breakpoints or auto-display expressions.\n\ -Arguments are breakpoint numbers with spaces in between.\n\ -To delete all breakpoints, give no argument.\n\ -This command may be abbreviated \"delete\".", - &deletelist); - - add_com ("clear", class_breakpoint, clear_command, - "Clear breakpoint at specified line or function.\n\ -Argument may be line number, function name, or \"*\" and an address.\n\ -If line number is specified, all breakpoints in that line are cleared.\n\ -If function is specified, breakpoints at beginning of function are cleared.\n\ -If an address is specified, breakpoints at that address are cleared.\n\n\ -With no argument, clears all breakpoints in the line that the selected frame\n\ -is executing in.\n\ -\n\ -See also the \"delete\" command which clears breakpoints by number."); - - add_com ("break", class_breakpoint, break_command, - "Set breakpoint at specified line or function.\n\ -Argument may be line number, function name, or \"*\" and an address.\n\ -If line number is specified, break at start of code for that line.\n\ -If function is specified, break at start of code for that function.\n\ -If an address is specified, break at that exact address.\n\ -With no arg, uses current execution address of selected stack frame.\n\ -This is useful for breaking on return to a stack frame.\n\ -\n\ -Multiple breakpoints at one place are permitted, and useful if conditional.\n\ -\n\ -Do \"help breakpoints\" for info on other commands dealing with breakpoints."); - add_com_alias ("b", "break", class_run, 1); - add_com_alias ("br", "break", class_run, 1); - add_com_alias ("bre", "break", class_run, 1); - add_com_alias ("brea", "break", class_run, 1); - - add_info ("breakpoints", breakpoints_info, - "Status of all breakpoints, or breakpoint number NUMBER.\n\ -Second column is \"y\" for enabled breakpoint, \"n\" for disabled,\n\ -\"o\" for enabled once (disable when hit), \"d\" for enable but delete when hit.\n\ -Then come the address and the file/line number.\n\n\ -Convenience variable \"$_\" and default examine address for \"x\"\n\ -are set to the address of the last breakpoint listed."); -} - |