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- /* Everything about breakpoints, for GDB.
- Copyright 1986, 1987, 1989, 1990, 1991, 1992 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #include "defs.h"
- #include <ctype.h>
- #include "symtab.h"
- #include "frame.h"
- #include "breakpoint.h"
- #include "gdbtypes.h"
- #include "expression.h"
- #include "gdbcore.h"
- #include "gdbcmd.h"
- #include "value.h"
- #include "ctype.h"
- #include "command.h"
- #include "inferior.h"
- #include "target.h"
- #include "language.h"
- #include <string.h>
-
- /* local function prototypes */
-
- static void
- catch_command_1 PARAMS ((char *, int, int));
-
- static void
- enable_delete_command PARAMS ((char *, int));
-
- static void
- enable_delete_breakpoint PARAMS ((struct breakpoint *));
-
- static void
- enable_once_command PARAMS ((char *, int));
-
- static void
- enable_once_breakpoint PARAMS ((struct breakpoint *));
-
- static void
- disable_command PARAMS ((char *, int));
-
- static void
- disable_breakpoint PARAMS ((struct breakpoint *));
-
- static void
- enable_command PARAMS ((char *, int));
-
- static void
- enable_breakpoint PARAMS ((struct breakpoint *));
-
- static void
- map_breakpoint_numbers PARAMS ((char *, void (*)(struct breakpoint *)));
-
- static void
- ignore_command PARAMS ((char *, int));
-
- static int
- breakpoint_re_set_one PARAMS ((char *));
-
- static void
- delete_command PARAMS ((char *, int));
-
- static void
- clear_command PARAMS ((char *, int));
-
- static void
- catch_command PARAMS ((char *, int));
-
- static struct symtabs_and_lines
- get_catch_sals PARAMS ((int));
-
- static void
- watch_command PARAMS ((char *, int));
-
- static void
- tbreak_command PARAMS ((char *, int));
-
- static void
- break_command_1 PARAMS ((char *, int, int));
-
- static void
- mention PARAMS ((struct breakpoint *));
-
- static struct breakpoint *
- set_raw_breakpoint PARAMS ((struct symtab_and_line));
-
- static void
- check_duplicates PARAMS ((CORE_ADDR));
-
- static void
- describe_other_breakpoints PARAMS ((CORE_ADDR));
-
- static void
- breakpoints_info PARAMS ((char *, int));
-
- static void
- breakpoint_1 PARAMS ((int, int));
-
- static bpstat
- bpstat_alloc PARAMS ((struct breakpoint *, bpstat));
-
- static int
- breakpoint_cond_eval PARAMS ((char *));
-
- static void
- cleanup_executing_breakpoints PARAMS ((int));
-
- static void
- commands_command PARAMS ((char *, int));
-
- static void
- condition_command PARAMS ((char *, int));
-
- static int
- get_number PARAMS ((char **));
-
- static void
- set_breakpoint_count PARAMS ((int));
-
-
- extern int addressprint; /* Print machine addresses? */
- extern int demangle; /* Print de-mangled symbol names? */
-
- /* Are we executing breakpoint commands? */
- static int executing_breakpoint_commands;
-
- /* Walk the following statement or block through all breakpoints.
- ALL_BREAKPOINTS_SAFE does so even if the statment deletes the current
- breakpoint. */
-
- #define ALL_BREAKPOINTS(b) for (b = breakpoint_chain; b; b = b->next)
-
- #define ALL_BREAKPOINTS_SAFE(b,tmp) \
- for (b = breakpoint_chain; \
- b? (tmp=b->next, 1): 0; \
- b = tmp)
-
- /* Chain of all breakpoints defined. */
-
- struct breakpoint *breakpoint_chain;
-
- /* Number of last breakpoint made. */
-
- static int breakpoint_count;
-
- /* Set breakpoint count to NUM. */
- static void
- set_breakpoint_count (num)
- int num;
- {
- breakpoint_count = num;
- set_internalvar (lookup_internalvar ("bpnum"),
- value_from_longest (builtin_type_int, (LONGEST) num));
- }
-
- /* 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;
-
- /* Flag indicating extra verbosity for xgdb. */
- extern int xgdb_verbose;
-
- /* *PP is a string denoting a breakpoint. Get the number of the breakpoint.
- Advance *PP after the string and any trailing whitespace.
-
- Currently the string can either be a number or "$" followed by the name
- of a convenience variable. Making it an expression wouldn't work well
- for map_breakpoint_numbers (e.g. "4 + 5 + 6"). */
- static int
- get_number (pp)
- char **pp;
- {
- int retval;
- char *p = *pp;
-
- if (p == NULL)
- /* Empty line means refer to the last breakpoint. */
- return breakpoint_count;
- else if (*p == '$')
- {
- /* Make a copy of the name, so we can null-terminate it
- to pass to lookup_internalvar(). */
- char *varname;
- char *start = ++p;
- value val;
-
- while (isalnum (*p) || *p == '_')
- p++;
- varname = (char *) alloca (p - start + 1);
- strncpy (varname, start, p - start);
- varname[p - start] = '\0';
- val = value_of_internalvar (lookup_internalvar (varname));
- if (TYPE_CODE (VALUE_TYPE (val)) != TYPE_CODE_INT)
- error (
- "Convenience variables used to specify breakpoints must have integer values."
- );
- retval = (int) value_as_long (val);
- }
- else
- {
- if (*p == '-')
- ++p;
- while (*p >= '0' && *p <= '9')
- ++p;
- if (p == *pp)
- /* There is no number here. (e.g. "cond a == b"). */
- error_no_arg ("breakpoint number");
- retval = atoi (*pp);
- }
- if (!(isspace (*p) || *p == '\0'))
- error ("breakpoint number expected");
- while (isspace (*p))
- p++;
- *pp = p;
- return retval;
- }
-
- /* 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;
- char *p;
- register int bnum;
-
- if (arg == 0)
- error_no_arg ("breakpoint number");
-
- p = arg;
- bnum = get_number (&p);
-
- ALL_BREAKPOINTS (b)
- if (b->number == bnum)
- {
- if (b->cond)
- {
- free ((PTR)b->cond);
- b->cond = 0;
- }
- if (b->cond_string != NULL)
- free ((PTR)b->cond_string);
-
- if (*p == 0)
- {
- b->cond = 0;
- b->cond_string = NULL;
- if (from_tty)
- printf ("Breakpoint %d now unconditional.\n", bnum);
- }
- else
- {
- arg = p;
- /* I don't know if it matters whether this is the string the user
- typed in or the decompiled expression. */
- b->cond_string = savestring (arg, strlen (arg));
- b->cond = parse_exp_1 (&arg, block_for_pc (b->address), 0);
- if (*arg)
- error ("Junk at end of expression");
- }
- return;
- }
-
- error ("No breakpoint number %d.", bnum);
- }
-
- /* ARGSUSED */
- static void
- commands_command (arg, from_tty)
- char *arg;
- int from_tty;
- {
- register struct breakpoint *b;
- char *p;
- 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 (executing_breakpoint_commands)
- error ("Can't use the \"commands\" command among a breakpoint's commands.");
-
- p = arg;
- bnum = get_number (&p);
- if (p && *p)
- error ("Unexpected extra arguments following breakpoint number.");
-
- ALL_BREAKPOINTS (b)
- if (b->number == bnum)
- {
- if (from_tty && 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);
- }
-
- extern int memory_breakpoint_size; /* from mem-break.c */
-
- /* Like target_read_memory() but if breakpoints are inserted, return
- the shadow contents instead of the breakpoints themselves.
-
- Read "memory data" from whatever target or inferior we have.
- Returns zero if successful, errno value if not. EIO is used
- for address out of bounds. If breakpoints are inserted, returns
- shadow contents, not the breakpoints themselves. From breakpoint.c. */
-
- int
- read_memory_nobpt (memaddr, myaddr, len)
- CORE_ADDR memaddr;
- char *myaddr;
- unsigned len;
- {
- int status;
- struct breakpoint *b;
-
- if (memory_breakpoint_size < 0)
- /* No breakpoints on this machine. */
- return target_read_memory (memaddr, myaddr, len);
-
- ALL_BREAKPOINTS (b)
- {
- if (b->type == bp_watchpoint || !b->inserted)
- continue;
- else if (b->address + memory_breakpoint_size <= memaddr)
- /* The breakpoint is entirely before the chunk of memory
- we are reading. */
- continue;
- else if (b->address >= memaddr + len)
- /* The breakpoint is entirely after the chunk of memory we
- are reading. */
- continue;
- else
- {
- /* Copy the breakpoint from the shadow contents, and recurse
- for the things before and after. */
-
- /* Addresses and length of the part of the breakpoint that
- we need to copy. */
- CORE_ADDR membpt = b->address;
- unsigned int bptlen = memory_breakpoint_size;
- /* Offset within shadow_contents. */
- int bptoffset = 0;
-
- if (membpt < memaddr)
- {
- /* Only copy the second part of the breakpoint. */
- bptlen -= memaddr - membpt;
- bptoffset = memaddr - membpt;
- membpt = memaddr;
- }
-
- if (membpt + bptlen > memaddr + len)
- {
- /* Only copy the first part of the breakpoint. */
- bptlen -= (membpt + bptlen) - (memaddr + len);
- }
-
- bcopy (b->shadow_contents + bptoffset,
- myaddr + membpt - memaddr, bptlen);
-
- if (membpt > memaddr)
- {
- /* Copy the section of memory before the breakpoint. */
- status = read_memory_nobpt (memaddr, myaddr, membpt - memaddr);
- if (status != 0)
- return status;
- }
-
- if (membpt + bptlen < memaddr + len)
- {
- /* Copy the section of memory after the breakpoint. */
- status = read_memory_nobpt
- (membpt + bptlen,
- myaddr + membpt + bptlen - memaddr,
- memaddr + len - (membpt + bptlen));
- if (status != 0)
- return status;
- }
- return 0;
- }
- }
- /* Nothing overlaps. Just call read_memory_noerr. */
- return target_read_memory (memaddr, myaddr, len);
- }
-
- /* 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 = 0;
- int disabled_breaks = 0;
-
- ALL_BREAKPOINTS (b)
- if (b->type != bp_watchpoint
- && b->enable != disabled
- && ! b->inserted
- && ! b->duplicate)
- {
- val = target_insert_breakpoint(b->address, b->shadow_contents);
- if (val)
- {
- /* Can't set the breakpoint. */
- #if defined (DISABLE_UNSETTABLE_BREAK)
- if (DISABLE_UNSETTABLE_BREAK (b->address))
- {
- val = 0;
- b->enable = disabled;
- if (!disabled_breaks)
- {
- fprintf (stderr,
- "Cannot insert breakpoint %d:\n", b->number);
- printf_filtered ("Disabling shared library breakpoints:\n");
- }
- disabled_breaks = 1;
- printf_filtered ("%d ", b->number);
- }
- else
- #endif
- {
- fprintf (stderr, "Cannot insert breakpoint %d:\n", b->number);
- #ifdef ONE_PROCESS_WRITETEXT
- fprintf (stderr,
- "The same program may be running in another process.\n");
- #endif
- memory_error (val, b->address); /* which bombs us out */
- }
- }
- else
- b->inserted = 1;
- }
- if (disabled_breaks)
- printf_filtered ("\n");
- return val;
- }
-
- int
- remove_breakpoints ()
- {
- register struct breakpoint *b;
- int val;
-
- #ifdef BREAKPOINT_DEBUG
- printf ("Removing breakpoints.\n");
- #endif /* BREAKPOINT_DEBUG */
-
- ALL_BREAKPOINTS (b)
- if (b->type != bp_watchpoint && b->inserted)
- {
- val = target_remove_breakpoint(b->address, b->shadow_contents);
- if (val)
- return val;
- b->inserted = 0;
- #ifdef BREAKPOINT_DEBUG
- printf ("Removed breakpoint at %s",
- local_hex_string(b->address));
- printf (", shadow %s",
- local_hex_string(b->shadow_contents[0]));
- printf (", %s.\n",
- local_hex_string(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;
- }
-
- /* bpstat stuff. External routines' interfaces are documented
- in breakpoint.h. */
-
- /* Clear a bpstat so that it says we are not at any breakpoint.
- Also free any storage that is part of a bpstat. */
-
- void
- bpstat_clear (bsp)
- bpstat *bsp;
- {
- bpstat p;
- bpstat q;
-
- if (bsp == 0)
- return;
- p = *bsp;
- while (p != NULL)
- {
- q = p->next;
- if (p->old_val != NULL)
- value_free (p->old_val);
- free ((PTR)p);
- p = q;
- }
- *bsp = NULL;
- }
-
- /* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
- is part of the bpstat is copied as well. */
-
- bpstat
- bpstat_copy (bs)
- bpstat bs;
- {
- bpstat p = NULL;
- bpstat tmp;
- bpstat retval;
-
- if (bs == NULL)
- return bs;
-
- for (; bs != NULL; bs = bs->next)
- {
- tmp = (bpstat) xmalloc (sizeof (*tmp));
- bcopy (bs, tmp, sizeof (*tmp));
- if (p == NULL)
- /* This is the first thing in the chain. */
- retval = tmp;
- else
- p->next = tmp;
- p = tmp;
- }
- p->next = NULL;
- return retval;
- }
-
- /* Find the bpstat associated with this breakpoint */
-
- bpstat
- bpstat_find_breakpoint(bsp, breakpoint)
- bpstat bsp;
- struct breakpoint *breakpoint;
- {
- if (bsp == NULL) return NULL;
-
- for (;bsp != NULL; bsp = bsp->next) {
- if (bsp->breakpoint_at == breakpoint) return bsp;
- }
- return NULL;
- }
-
- /* Return the breakpoint number of the first breakpoint we are stopped
- at. *BSP upon return is a bpstat which points to the remaining
- breakpoints stopped at (but which is not guaranteed to be good for
- anything but further calls to bpstat_num).
- Return 0 if passed a bpstat which does not indicate any breakpoints. */
-
- int
- bpstat_num (bsp)
- bpstat *bsp;
- {
- struct breakpoint *b;
-
- if ((*bsp) == NULL)
- return 0; /* No more breakpoint values */
- else
- {
- b = (*bsp)->breakpoint_at;
- *bsp = (*bsp)->next;
- if (b == NULL)
- return -1; /* breakpoint that's been deleted since */
- else
- return b->number; /* We have its number */
- }
- }
-
- /* Modify BS so that the actions will not be performed. */
-
- void
- bpstat_clear_actions (bs)
- bpstat bs;
- {
- for (; bs != NULL; bs = bs->next)
- {
- bs->commands = NULL;
- if (bs->old_val != NULL)
- {
- value_free (bs->old_val);
- bs->old_val = NULL;
- }
- }
- }
-
- /* Stub for cleaning up our state if we error-out of a breakpoint command */
- /* ARGSUSED */
- static void
- cleanup_executing_breakpoints (ignore)
- int ignore;
- {
- executing_breakpoint_commands = 0;
- }
-
- /* Execute all the commands associated with all the breakpoints at this
- location. Any of these commands could cause the process to proceed
- beyond this point, etc. We look out for such changes by checking
- the global "breakpoint_proceeded" after each command. */
-
- void
- bpstat_do_actions (bsp)
- bpstat *bsp;
- {
- bpstat bs;
- struct cleanup *old_chain;
-
- executing_breakpoint_commands = 1;
- old_chain = make_cleanup (cleanup_executing_breakpoints, 0);
-
- top:
- bs = *bsp;
-
- breakpoint_proceeded = 0;
- for (; bs != NULL; bs = bs->next)
- {
- while (bs->commands)
- {
- char *line = bs->commands->line;
- bs->commands = bs->commands->next;
- execute_command (line, 0);
- /* If the inferior is proceeded by the command, bomb out now.
- The bpstat chain has been blown away by wait_for_inferior.
- But since execution has stopped again, there is a new bpstat
- to look at, so start over. */
- if (breakpoint_proceeded)
- goto top;
- }
- }
-
- executing_breakpoint_commands = 0;
- discard_cleanups (old_chain);
- }
-
- /* Print a message indicating what happened. Returns nonzero to
- say that only the source line should be printed after this (zero
- return means print the frame as well as the source line). */
-
- int
- bpstat_print (bs)
- bpstat bs;
- {
- /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
- which has since been deleted. */
- if (bs == NULL
- || bs->breakpoint_at == NULL
- || (bs->breakpoint_at->type != bp_breakpoint
- && bs->breakpoint_at->type != bp_watchpoint))
- return 0;
-
- /* If bpstat_stop_status says don't print, OK, we won't. An example
- circumstance is when we single-stepped for both a watchpoint and
- for a "stepi" instruction. The bpstat says that the watchpoint
- explains the stop, but we shouldn't print because the watchpoint's
- value didn't change -- and the real reason we are stopping here
- rather than continuing to step (as the watchpoint would've had us do)
- is because of the "stepi". */
- if (!bs->print)
- return 0;
-
- if (bs->breakpoint_at->type == bp_breakpoint)
- {
- /* I think the user probably only wants to see one breakpoint
- number, not all of them. */
- printf_filtered ("\nBreakpoint %d, ", bs->breakpoint_at->number);
- return 0;
- }
-
- if (bs->old_val != NULL)
- {
- printf_filtered ("\nWatchpoint %d, ", bs->breakpoint_at->number);
- print_expression (bs->breakpoint_at->exp, stdout);
- printf_filtered ("\nOld value = ");
- value_print (bs->old_val, stdout, 0, Val_pretty_default);
- printf_filtered ("\nNew value = ");
- value_print (bs->breakpoint_at->val, stdout, 0,
- Val_pretty_default);
- printf_filtered ("\n");
- value_free (bs->old_val);
- bs->old_val = NULL;
- return 1;
- }
-
- /* Maybe another breakpoint in the chain caused us to stop.
- (Currently all watchpoints go on the bpstat whether hit or
- not. That probably could (should) be changed, provided care is taken
- with respect to bpstat_explains_signal). */
- if (bs->next)
- return bpstat_print (bs->next);
-
- fprintf_filtered (stderr, "gdb internal error: in bpstat_print\n");
- 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.
- The argument is a "struct expression *" that has been cast to char * to
- make it pass through catch_errors. */
-
- static int
- breakpoint_cond_eval (exp)
- char *exp;
- {
- return !value_true (evaluate_expression ((struct expression *)exp));
- }
-
- /* Allocate a new bpstat and chain it to the current one. */
-
- static bpstat
- bpstat_alloc (b, cbs)
- register struct breakpoint *b;
- bpstat cbs; /* Current "bs" value */
- {
- bpstat bs;
-
- bs = (bpstat) xmalloc (sizeof (*bs));
- cbs->next = bs;
- bs->breakpoint_at = b;
- /* If the condition is false, etc., don't do the commands. */
- bs->commands = NULL;
- bs->momentary = b->disposition == delete;
- bs->old_val = NULL;
- return bs;
- }
-
- /* Determine whether we stopped at a breakpoint, etc, or whether we
- don't understand this stop. Result is a chain of bpstat's such that:
-
- if we don't understand the stop, the result is a null pointer.
-
- if we understand why we stopped, the result is not null, and
- the first element of the chain contains summary "stop" and
- "print" flags for the whole chain.
-
- Each element of the chain refers to a particular breakpoint or
- watchpoint at which we have stopped. (We may have stopped for
- several reasons.)
-
- Each element of the chain has valid next, breakpoint_at,
- commands, FIXME??? fields.
-
- */
-
-
- bpstat
- bpstat_stop_status (pc, frame_address)
- CORE_ADDR *pc;
- FRAME_ADDR frame_address;
- {
- register struct breakpoint *b;
- int stop = 0;
- int print = 0;
- CORE_ADDR bp_addr;
- #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS)
- /* True if we've hit a breakpoint (as opposed to a watchpoint). */
- int real_breakpoint = 0;
- #endif
- /* Root of the chain of bpstat's */
- struct bpstat root_bs[1];
- /* Pointer to the last thing in the chain currently. */
- bpstat bs = root_bs;
-
- /* Get the address where the breakpoint would have been. */
- bp_addr = *pc - DECR_PC_AFTER_BREAK;
-
- ALL_BREAKPOINTS (b)
- {
- int this_bp_stop;
- int this_bp_print;
-
- if (b->enable == disabled)
- continue;
-
- if (b->type != bp_watchpoint && b->address != bp_addr)
- continue;
-
- /* Come here if it's a watchpoint, or if the break address matches */
-
- bs = bpstat_alloc (b, bs); /* Alloc a bpstat to explain stop */
-
- this_bp_stop = 1;
- this_bp_print = 1;
-
- if (b->type == bp_watchpoint)
- {
- int within_current_scope;
- if (b->exp_valid_block != NULL)
- within_current_scope =
- contained_in (get_selected_block (), b->exp_valid_block);
- else
- within_current_scope = 1;
-
- if (within_current_scope)
- {
- /* We use value_{,free_to_}mark because it could be a
- *long* time before we return to the command level and
- call free_all_values. */
-
- value mark = value_mark ();
- value new_val = evaluate_expression (b->exp);
- if (!value_equal (b->val, new_val))
- {
- release_value (new_val);
- value_free_to_mark (mark);
- bs->old_val = b->val;
- b->val = new_val;
- /* We will stop here */
- }
- else
- {
- /* Nothing changed, don't do anything. */
- value_free_to_mark (mark);
- continue;
- /* We won't stop here */
- }
- }
- else
- {
- /* This seems like the only logical thing to do because
- if we temporarily ignored the watchpoint, then when
- we reenter the block in which it is valid it contains
- garbage (in the case of a function, it may have two
- garbage values, one before and one after the prologue).
- So we can't even detect the first assignment to it and
- watch after that (since the garbage may or may not equal
- the first value assigned). */
- b->enable = disabled;
- printf_filtered ("\
- Watchpoint %d disabled because the program has left the block in\n\
- which its expression is valid.\n", b->number);
- /* We won't stop here */
- /* FIXME, maybe we should stop here!!! */
- continue;
- }
- }
- #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS)
- else
- real_breakpoint = 1;
- #endif
-
- if (b->frame && b->frame != frame_address)
- this_bp_stop = 0;
- else
- {
- int value_is_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_is_zero
- = catch_errors (breakpoint_cond_eval, (char *)(b->cond),
- "Error in testing breakpoint condition:\n");
- /* FIXME-someday, should give breakpoint # */
- free_all_values ();
- }
- if (b->cond && value_is_zero)
- {
- this_bp_stop = 0;
- }
- else if (b->ignore_count > 0)
- {
- b->ignore_count--;
- this_bp_stop = 0;
- }
- else
- {
- /* We will stop here */
- if (b->disposition == disable)
- b->enable = disabled;
- bs->commands = b->commands;
- if (b->silent)
- this_bp_print = 0;
- if (bs->commands && !strcmp ("silent", bs->commands->line))
- {
- bs->commands = bs->commands->next;
- this_bp_print = 0;
- }
- }
- }
- if (this_bp_stop)
- stop = 1;
- if (this_bp_print)
- print = 1;
- }
-
- bs->next = NULL; /* Terminate the chain */
- bs = root_bs->next; /* Re-grab the head of the chain */
- if (bs)
- {
- bs->stop = stop;
- bs->print = print;
- #if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS)
- if (real_breakpoint)
- {
- *pc = bp_addr;
- #if defined (SHIFT_INST_REGS)
- {
- CORE_ADDR pc = read_register (PC_REGNUM);
- CORE_ADDR npc = read_register (NPC_REGNUM);
- if (pc != npc)
- {
- write_register (NNPC_REGNUM, npc);
- write_register (NPC_REGNUM, pc);
- }
- }
- #else /* No SHIFT_INST_REGS. */
- write_pc (bp_addr);
- #endif /* No SHIFT_INST_REGS. */
- }
- #endif /* DECR_PC_AFTER_BREAK != 0. */
- }
- return bs;
- }
-
- /* Nonzero if we should step constantly (e.g. watchpoints on machines
- without hardware support). This isn't related to a specific bpstat,
- just to things like whether watchpoints are set. */
-
- int
- bpstat_should_step ()
- {
- struct breakpoint *b;
- ALL_BREAKPOINTS (b)
- if (b->enable == enabled && b->type == bp_watchpoint)
- return 1;
- return 0;
- }
-
- /* Print information on breakpoint number BNUM, or -1 if all.
- If WATCHPOINTS is zero, process only breakpoints; if WATCHPOINTS
- is nonzero, process only watchpoints. */
-
- static void
- breakpoint_1 (bnum, allflag)
- int bnum;
- int allflag;
- {
- register struct breakpoint *b;
- register struct command_line *l;
- register struct symbol *sym;
- CORE_ADDR last_addr = (CORE_ADDR)-1;
- int found_a_breakpoint = 0;
- static char *bptypes[] = {"breakpoint", "until", "finish", "watchpoint",
- "longjmp", "longjmp resume"};
- static char *bpdisps[] = {"del", "dis", "keep"};
- static char bpenables[] = "ny";
-
- if (!breakpoint_chain)
- {
- printf_filtered ("No breakpoints or watchpoints.\n");
- return;
- }
-
- ALL_BREAKPOINTS (b)
- if (bnum == -1
- || bnum == b->number)
- {
- /* We only print out user settable breakpoints unless the allflag is set. */
- if (!allflag
- && b->type != bp_breakpoint
- && b->type != bp_watchpoint)
- continue;
-
- if (!found_a_breakpoint++)
- printf_filtered ("Num Type Disp Enb %sWhat\n",
- addressprint ? "Address " : "");
-
- printf_filtered ("%-3d %-14s %-4s %-3c ",
- b->number,
- bptypes[(int)b->type],
- bpdisps[(int)b->disposition],
- bpenables[(int)b->enable]);
- switch (b->type)
- {
- case bp_watchpoint:
- print_expression (b->exp, stdout);
- break;
- case bp_breakpoint:
- case bp_until:
- case bp_finish:
- case bp_longjmp:
- case bp_longjmp_resume:
- if (addressprint)
- printf_filtered ("%s ", local_hex_string_custom(b->address, "08"));
-
- last_addr = b->address;
- if (b->symtab)
- {
- sym = find_pc_function (b->address);
- if (sym)
- {
- fputs_filtered ("in ", stdout);
- fputs_demangled (SYMBOL_NAME (sym), stdout, 1);
- fputs_filtered (" at ", stdout);
- }
- fputs_filtered (b->symtab->filename, stdout);
- printf_filtered (":%d", b->line_number);
- }
- else
- print_address_symbolic (b->address, stdout, demangle, " ");
- }
-
- printf_filtered ("\n");
-
- if (b->frame)
- printf_filtered ("\tstop only in stack frame at %s\n",
- local_hex_string(b->frame));
- if (b->cond)
- {
- printf_filtered ("\tstop only if ");
- print_expression (b->cond, stdout);
- printf_filtered ("\n");
- }
- if (b->ignore_count)
- printf_filtered ("\tignore next %d hits\n", b->ignore_count);
- if ((l = b->commands))
- while (l)
- {
- fputs_filtered ("\t", stdout);
- fputs_filtered (l->line, stdout);
- fputs_filtered ("\n", stdout);
- l = l->next;
- }
- }
-
- if (!found_a_breakpoint
- && bnum != -1)
- printf_filtered ("No breakpoint or watchpoint number %d.\n", bnum);
- else
- /* 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);
- }
-
- /* ARGSUSED */
- static void
- breakpoints_info (bnum_exp, from_tty)
- char *bnum_exp;
- int from_tty;
- {
- int bnum = -1;
-
- if (bnum_exp)
- bnum = parse_and_eval_address (bnum_exp);
-
- breakpoint_1 (bnum, 0);
- }
-
- /* ARGSUSED */
- static void
- all_breakpoints_info (bnum_exp, from_tty)
- char *bnum_exp;
- int from_tty;
- {
- int bnum = -1;
-
- if (bnum_exp)
- bnum = parse_and_eval_address (bnum_exp);
-
- breakpoint_1 (bnum, 1);
- }
-
- /* 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 %s.\n", local_hex_string(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;
-
- if (address == 0) /* Watchpoints are uninteresting */
- return;
-
- 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.
-
- ==> This routine should not be called if there is a chance of later
- error(); otherwise it leaves a bogus breakpoint on the chain. Validate
- your arguments BEFORE calling this routine! */
-
- 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;
- b->ignore_count = 0;
- b->commands = NULL;
- b->frame = 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;
- }
-
- static void
- create_longjmp_breakpoint(func_name)
- char *func_name;
- {
- struct symtab_and_line sal;
- struct breakpoint *b;
- static int internal_breakpoint_number = -1;
-
- if (func_name != NULL)
- {
- struct minimal_symbol *m;
-
- m = lookup_minimal_symbol(func_name, (struct objfile *)NULL);
- if (m)
- sal.pc = m->address;
- else
- return;
- }
- else
- sal.pc = 0;
-
- sal.symtab = NULL;
- sal.line = 0;
-
- b = set_raw_breakpoint(sal);
- if (!b) return;
-
- b->type = func_name != NULL ? bp_longjmp : bp_longjmp_resume;
- b->disposition = donttouch;
- b->enable = disabled;
- b->silent = 1;
- if (func_name)
- b->addr_string = strsave(func_name);
- b->number = internal_breakpoint_number--;
- }
-
- /* Call this routine when stepping and nexting to enable a breakpoint if we do
- a longjmp(). When we hit that breakpoint, call
- set_longjmp_resume_breakpoint() to figure out where we are going. */
-
- void
- enable_longjmp_breakpoint()
- {
- register struct breakpoint *b;
-
- ALL_BREAKPOINTS (b)
- if (b->type == bp_longjmp)
- b->enable = enabled;
- }
-
- void
- disable_longjmp_breakpoint()
- {
- register struct breakpoint *b;
-
- ALL_BREAKPOINTS (b)
- if (b->type == bp_longjmp
- || b->type == bp_longjmp_resume)
- b->enable = disabled;
- }
-
- /* Call this after hitting the longjmp() breakpoint. Use this to set a new
- breakpoint at the target of the jmp_buf.
-
- FIXME - This ought to be done by setting a temporary breakpoint that gets
- deleted automatically...
- */
-
- void
- set_longjmp_resume_breakpoint(pc, frame)
- CORE_ADDR pc;
- FRAME frame;
- {
- register struct breakpoint *b;
-
- ALL_BREAKPOINTS (b)
- if (b->type == bp_longjmp_resume)
- {
- b->address = pc;
- b->enable = enabled;
- if (frame != NULL)
- b->frame = FRAME_FP(frame);
- else
- b->frame = 0;
- return;
- }
- }
-
- /* Set a breakpoint that will evaporate an end of command
- at address specified by SAL.
- Restrict it to frame FRAME if FRAME is nonzero. */
-
- struct breakpoint *
- set_momentary_breakpoint (sal, frame, type)
- struct symtab_and_line sal;
- FRAME frame;
- enum bptype type;
- {
- register struct breakpoint *b;
- b = set_raw_breakpoint (sal);
- b->type = type;
- b->enable = enabled;
- b->disposition = donttouch;
- b->frame = (frame ? FRAME_FP (frame) : 0);
- return b;
- }
-
- #if 0
- void
- clear_momentary_breakpoints ()
- {
- register struct breakpoint *b;
- ALL_BREAKPOINTS (b)
- if (b->disposition == delete)
- {
- delete_breakpoint (b);
- break;
- }
- }
- #endif
-
- /* Tell the user we have just set a breakpoint B. */
- static void
- mention (b)
- struct breakpoint *b;
- {
- switch (b->type)
- {
- case bp_watchpoint:
- printf_filtered ("Watchpoint %d: ", b->number);
- print_expression (b->exp, stdout);
- break;
- case bp_breakpoint:
- printf_filtered ("Breakpoint %d at %s", b->number,
- local_hex_string(b->address));
- if (b->symtab)
- printf_filtered (": file %s, line %d.",
- b->symtab->filename, b->line_number);
- }
- printf_filtered ("\n");
- }
-
- #if 0
- /* Nobody calls this currently. */
- /* Set a breakpoint from a symtab and line.
- If TEMPFLAG is nonzero, it is a temporary breakpoint.
- ADDR_STRING is a malloc'd string holding the name of where we are
- setting the breakpoint. This is used later to re-set it after the
- program is relinked and symbols are reloaded.
- Print the same confirmation messages that the breakpoint command prints. */
-
- void
- set_breakpoint (s, line, tempflag, addr_string)
- struct symtab *s;
- int line;
- int tempflag;
- char *addr_string;
- {
- register struct breakpoint *b;
- struct symtab_and_line sal;
-
- sal.symtab = s;
- sal.line = line;
- sal.pc = 0;
- resolve_sal_pc (&sal); /* Might error out */
- describe_other_breakpoints (sal.pc);
-
- b = set_raw_breakpoint (sal);
- set_breakpoint_count (breakpoint_count + 1);
- b->number = breakpoint_count;
- b->type = bp_breakpoint;
- b->cond = 0;
- b->addr_string = addr_string;
- b->enable = enabled;
- b->disposition = tempflag ? delete : donttouch;
-
- mention (b);
- }
- #endif /* 0 */
-
- /* 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;
-
- /* Pointers in arg to the start, and one past the end, of the condition. */
- char *cond_start = NULL;
- char *cond_end;
- /* Pointers in arg to the start, and one past the end,
- of the address part. */
- char *addr_start = NULL;
- char *addr_end;
-
- int i;
-
- 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 *)
- xmalloc (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
- {
- addr_start = arg;
-
- /* 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, (struct symtab *)NULL, 0);
-
- addr_end = arg;
- }
-
- if (! sals.nelts)
- return;
-
- /* Resolve all line numbers to PC's, and verify that conditions
- can be parsed, before setting any breakpoints. */
- for (i = 0; i < sals.nelts; i++)
- {
- resolve_sal_pc (&sals.sals[i]);
-
- while (arg && *arg)
- {
- if (arg[0] == 'i' && arg[1] == 'f'
- && (arg[2] == ' ' || arg[2] == '\t'))
- {
- arg += 2;
- cond_start = arg;
- cond = parse_exp_1 (&arg, block_for_pc (sals.sals[i].pc), 0);
- cond_end = arg;
- }
- else
- error ("Junk at end of arguments.");
- }
- }
-
- /* Now set all the breakpoints. */
- for (i = 0; i < sals.nelts; i++)
- {
- sal = sals.sals[i];
-
- if (from_tty)
- describe_other_breakpoints (sal.pc);
-
- b = set_raw_breakpoint (sal);
- set_breakpoint_count (breakpoint_count + 1);
- b->number = breakpoint_count;
- b->type = bp_breakpoint;
- b->cond = cond;
-
- if (addr_start)
- b->addr_string = savestring (addr_start, addr_end - addr_start);
- if (cond_start)
- b->cond_string = savestring (cond_start, cond_end - cond_start);
-
- b->enable = enabled;
- b->disposition = tempflag ? delete : donttouch;
-
- mention (b);
- }
-
- if (sals.nelts > 1)
- {
- printf ("Multiple breakpoints were set.\n");
- printf ("Use the \"delete\" command to delete unwanted breakpoints.\n");
- }
- free ((PTR)sals.sals);
- }
-
- /* Helper function for break_command_1 and disassemble_command. */
-
- void
- resolve_sal_pc (sal)
- struct symtab_and_line *sal;
- {
- CORE_ADDR pc;
-
- 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);
- sal->pc = pc;
- }
- }
-
- 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);
- }
-
- /* ARGSUSED */
- static void
- watch_command (arg, from_tty)
- char *arg;
- int from_tty;
- {
- struct breakpoint *b;
- struct symtab_and_line sal;
- struct expression *exp;
- struct block *exp_valid_block;
- struct value *val;
-
- sal.pc = 0;
- sal.symtab = NULL;
- sal.line = 0;
-
- /* Parse arguments. */
- innermost_block = NULL;
- exp = parse_expression (arg);
- exp_valid_block = innermost_block;
- val = evaluate_expression (exp);
- release_value (val);
-
- /* Now set up the breakpoint. */
- b = set_raw_breakpoint (sal);
- set_breakpoint_count (breakpoint_count + 1);
- b->number = breakpoint_count;
- b->type = bp_watchpoint;
- b->disposition = donttouch;
- b->exp = exp;
- b->exp_valid_block = exp_valid_block;
- b->val = val;
- b->cond = 0;
- b->cond_string = NULL;
- mention (b);
- }
-
- /*
- * Helper routine for the until_command routine in infcmd.c. Here
- * because it uses the mechanisms of breakpoints.
- */
- /* ARGSUSED */
- 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);
- struct breakpoint *breakpoint;
- struct cleanup *old_chain;
-
- 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, (struct symtab *)NULL, 0);
-
- if (sals.nelts != 1)
- error ("Couldn't get information on specified line.");
-
- sal = sals.sals[0];
- free ((PTR)sals.sals); /* malloc'd, so freed */
-
- if (*arg)
- error ("Junk at end of arguments.");
-
- resolve_sal_pc (&sal);
-
- breakpoint = set_momentary_breakpoint (sal, selected_frame, bp_until);
-
- old_chain = make_cleanup(delete_breakpoint, breakpoint);
-
- /* 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;
- breakpoint = set_momentary_breakpoint (sal, prev_frame, bp_until);
- make_cleanup(delete_breakpoint, breakpoint);
- }
-
- proceed (-1, -1, 0);
- do_cleanups(old_chain);
- }
-
- #if 0
- /* These aren't used; I don't konw what they were for. */
- /* Set a breakpoint at the catch clause for NAME. */
- static int
- catch_breakpoint (name)
- char *name;
- {
- }
-
- static int
- disable_catch_breakpoint ()
- {
- }
-
- static int
- delete_catch_breakpoint ()
- {
- }
-
- static int
- enable_catch_breakpoint ()
- {
- }
- #endif /* 0 */
-
- struct sal_chain
- {
- struct sal_chain *next;
- struct symtab_and_line sal;
- };
-
- #if 0
- /* This isn't used; I don't know what it was for. */
- /* For each catch clause identified in ARGS, run FUNCTION
- with that clause as an argument. */
- static struct symtabs_and_lines
- map_catch_names (args, function)
- char *args;
- int (*function)();
- {
- register char *p = args;
- register char *p1;
- struct symtabs_and_lines sals;
- #if 0
- struct sal_chain *sal_chain = 0;
- #endif
-
- if (p == 0)
- error_no_arg ("one or more catch names");
-
- sals.nelts = 0;
- sals.sals = NULL;
-
- while (*p)
- {
- p1 = p;
- /* Don't swallow conditional part. */
- if (p1[0] == 'i' && p1[1] == 'f'
- && (p1[2] == ' ' || p1[2] == '\t'))
- break;
-
- if (isalpha (*p1))
- {
- p1++;
- while (isalnum (*p1) || *p1 == '_' || *p1 == '$')
- p1++;
- }
-
- if (*p1 && *p1 != ' ' && *p1 != '\t')
- error ("Arguments must be catch names.");
-
- *p1 = 0;
- #if 0
- if (function (p))
- {
- struct sal_chain *next
- = (struct sal_chain *)alloca (sizeof (struct sal_chain));
- next->next = sal_chain;
- next->sal = get_catch_sal (p);
- sal_chain = next;
- goto win;
- }
- #endif
- printf ("No catch clause for exception %s.\n", p);
- #if 0
- win:
- #endif
- p = p1;
- while (*p == ' ' || *p == '\t') p++;
- }
- }
- #endif /* 0 */
-
- /* This shares a lot of code with `print_frame_label_vars' from stack.c. */
-
- static struct symtabs_and_lines
- get_catch_sals (this_level_only)
- int this_level_only;
- {
- register struct blockvector *bl;
- register struct block *block;
- int index, have_default = 0;
- struct frame_info *fi;
- CORE_ADDR pc;
- struct symtabs_and_lines sals;
- struct sal_chain *sal_chain = 0;
- char *blocks_searched;
-
- /* Not sure whether an error message is always the correct response,
- but it's better than a core dump. */
- if (selected_frame == NULL)
- error ("No selected frame.");
- block = get_frame_block (selected_frame);
- fi = get_frame_info (selected_frame);
- pc = fi->pc;
-
- sals.nelts = 0;
- sals.sals = NULL;
-
- if (block == 0)
- error ("No symbol table info available.\n");
-
- bl = blockvector_for_pc (BLOCK_END (block) - 4, &index);
- blocks_searched = (char *) alloca (BLOCKVECTOR_NBLOCKS (bl) * sizeof (char));
- bzero (blocks_searched, BLOCKVECTOR_NBLOCKS (bl) * sizeof (char));
-
- while (block != 0)
- {
- CORE_ADDR end = BLOCK_END (block) - 4;
- int last_index;
-
- if (bl != blockvector_for_pc (end, &index))
- error ("blockvector blotch");
- if (BLOCKVECTOR_BLOCK (bl, index) != block)
- error ("blockvector botch");
- last_index = BLOCKVECTOR_NBLOCKS (bl);
- index += 1;
-
- /* Don't print out blocks that have gone by. */
- while (index < last_index
- && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < pc)
- index++;
-
- while (index < last_index
- && BLOCK_END (BLOCKVECTOR_BLOCK (bl, index)) < end)
- {
- if (blocks_searched[index] == 0)
- {
- struct block *b = BLOCKVECTOR_BLOCK (bl, index);
- int nsyms;
- register int i;
- register struct symbol *sym;
-
- nsyms = BLOCK_NSYMS (b);
-
- for (i = 0; i < nsyms; i++)
- {
- sym = BLOCK_SYM (b, i);
- if (! strcmp (SYMBOL_NAME (sym), "default"))
- {
- if (have_default)
- continue;
- have_default = 1;
- }
- if (SYMBOL_CLASS (sym) == LOC_LABEL)
- {
- struct sal_chain *next = (struct sal_chain *)
- alloca (sizeof (struct sal_chain));
- next->next = sal_chain;
- next->sal = find_pc_line (SYMBOL_VALUE_ADDRESS (sym), 0);
- sal_chain = next;
- }
- }
- blocks_searched[index] = 1;
- }
- index++;
- }
- if (have_default)
- break;
- if (sal_chain && this_level_only)
- break;
-
- /* After handling the function's top-level block, stop.
- Don't continue to its superblock, the block of
- per-file symbols. */
- if (BLOCK_FUNCTION (block))
- break;
- block = BLOCK_SUPERBLOCK (block);
- }
-
- if (sal_chain)
- {
- struct sal_chain *tmp_chain;
-
- /* Count the number of entries. */
- for (index = 0, tmp_chain = sal_chain; tmp_chain;
- tmp_chain = tmp_chain->next)
- index++;
-
- sals.nelts = index;
- sals.sals = (struct symtab_and_line *)
- xmalloc (index * sizeof (struct symtab_and_line));
- for (index = 0; sal_chain; sal_chain = sal_chain->next, index++)
- sals.sals[index] = sal_chain->sal;
- }
-
- return sals;
- }
-
- /* Commands to deal with catching exceptions. */
-
- static void
- catch_command_1 (arg, tempflag, from_tty)
- char *arg;
- int tempflag;
- int from_tty;
- {
- /* First, translate ARG into something we can deal with in terms
- of breakpoints. */
-
- struct symtabs_and_lines sals;
- struct symtab_and_line sal;
- register struct expression *cond = 0;
- register struct breakpoint *b;
- char *save_arg;
- int i;
-
- sal.line = sal.pc = sal.end = 0;
- sal.symtab = 0;
-
- /* If no arg given, or if first arg is 'if ', all active catch clauses
- are breakpointed. */
-
- if (!arg || (arg[0] == 'i' && arg[1] == 'f'
- && (arg[2] == ' ' || arg[2] == '\t')))
- {
- /* Grab all active catch clauses. */
- sals = get_catch_sals (0);
- }
- else
- {
- /* Grab selected catch clauses. */
- error ("catch NAME not implemeneted");
- #if 0
- /* This isn't used; I don't know what it was for. */
- sals = map_catch_names (arg, catch_breakpoint);
- #endif
- }
-
- if (! sals.nelts)
- return;
-
- save_arg = arg;
- for (i = 0; i < sals.nelts; i++)
- {
- resolve_sal_pc (&sals.sals[i]);
-
- while (arg && *arg)
- {
- if (arg[0] == 'i' && arg[1] == 'f'
- && (arg[2] == ' ' || arg[2] == '\t'))
- cond = parse_exp_1 ((arg += 2, &arg),
- block_for_pc (sals.sals[i].pc), 0);
- else
- error ("Junk at end of arguments.");
- }
- arg = save_arg;
- }
-
- for (i = 0; i < sals.nelts; i++)
- {
- sal = sals.sals[i];
-
- if (from_tty)
- describe_other_breakpoints (sal.pc);
-
- b = set_raw_breakpoint (sal);
- set_breakpoint_count (breakpoint_count + 1);
- b->number = breakpoint_count;
- b->type = bp_breakpoint;
- b->cond = cond;
- b->enable = enabled;
- b->disposition = tempflag ? delete : donttouch;
-
- printf ("Breakpoint %d at %s", b->number, local_hex_string(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 ((PTR)sals.sals);
- }
-
- #if 0
- /* These aren't used; I don't know what they were for. */
- /* Disable breakpoints on all catch clauses described in ARGS. */
- static void
- disable_catch (args)
- char *args;
- {
- /* Map the disable command to catch clauses described in ARGS. */
- }
-
- /* Enable breakpoints on all catch clauses described in ARGS. */
- static void
- enable_catch (args)
- char *args;
- {
- /* Map the disable command to catch clauses described in ARGS. */
- }
-
- /* Delete breakpoints on all catch clauses in the active scope. */
- static void
- delete_catch (args)
- char *args;
- {
- /* Map the delete command to catch clauses described in ARGS. */
- }
- #endif /* 0 */
-
- static void
- catch_command (arg, from_tty)
- char *arg;
- int from_tty;
- {
- catch_command_1 (arg, 0, from_tty);
- }
-
- 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 *) xmalloc (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
- && b->next->type != bp_watchpoint
- && (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)
- {
- if (arg)
- error ("No breakpoint at %s.", arg);
- else
- error ("No breakpoint at this line.");
- }
-
- 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 ((PTR)sals.sals);
- }
-
- /* Delete breakpoint in BS if they are `delete' breakpoints.
- This is called after any breakpoint is hit, or after errors. */
-
- void
- breakpoint_auto_delete (bs)
- bpstat bs;
- {
- for (; bs; bs = bs->next)
- if (bs->breakpoint_at && bs->breakpoint_at->disposition == delete)
- delete_breakpoint (bs->breakpoint_at);
- }
-
- /* Delete a breakpoint and clean up all traces of it in the data structures. */
-
- void
- delete_breakpoint (bpt)
- struct breakpoint *bpt;
- {
- register struct breakpoint *b;
- register bpstat bs;
-
- if (bpt->inserted)
- target_remove_breakpoint(bpt->address, bpt->shadow_contents);
-
- 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 ((PTR)bpt->cond);
- if (bpt->cond_string != NULL)
- free ((PTR)bpt->cond_string);
- if (bpt->addr_string != NULL)
- free ((PTR)bpt->addr_string);
-
- if (xgdb_verbose && bpt->type == bp_breakpoint)
- printf ("breakpoint #%d deleted\n", bpt->number);
-
- /* Be sure no bpstat's are pointing at it after it's been freed. */
- /* FIXME, how can we find all bpstat's? We just check stop_bpstat for now. */
- for (bs = stop_bpstat; bs; bs = bs->next)
- if (bs->breakpoint_at == bpt)
- bs->breakpoint_at = NULL;
- free ((PTR)bpt);
- }
-
- static void
- delete_command (arg, from_tty)
- char *arg;
- int from_tty;
- {
-
- if (arg == 0)
- {
- /* Ask user only if there are some breakpoints to delete. */
- if (!from_tty
- || (breakpoint_chain && query ("Delete all breakpoints? ", 0, 0)))
- {
- /* No arg; clear all breakpoints. */
- while (breakpoint_chain)
- delete_breakpoint (breakpoint_chain);
- }
- }
- else
- map_breakpoint_numbers (arg, delete_breakpoint);
- }
-
- /* Reset a breakpoint given it's struct breakpoint * BINT.
- The value we return ends up being the return value from catch_errors.
- Unused in this case. */
-
- static int
- breakpoint_re_set_one (bint)
- char *bint;
- {
- struct breakpoint *b = (struct breakpoint *)bint; /* get past catch_errs */
- int i;
- struct symtabs_and_lines sals;
- char *s;
- enum enable save_enable;
-
- switch (b->type)
- {
- case bp_breakpoint:
- if (b->addr_string == NULL)
- {
- /* Anything without a string can't be re-set. */
- delete_breakpoint (b);
- return 0;
- }
- /* In case we have a problem, disable this breakpoint. We'll restore
- its status if we succeed. */
- save_enable = b->enable;
- b->enable = disabled;
-
- s = b->addr_string;
- sals = decode_line_1 (&s, 1, (struct symtab *)NULL, 0);
- for (i = 0; i < sals.nelts; i++)
- {
- resolve_sal_pc (&sals.sals[i]);
- if (b->symtab != sals.sals[i].symtab
- || b->line_number != sals.sals[i].line
- || b->address != sals.sals[i].pc)
- {
- b->symtab = sals.sals[i].symtab;
- b->line_number = sals.sals[i].line;
- b->address = sals.sals[i].pc;
-
- if (b->cond_string != NULL)
- {
- s = b->cond_string;
- b->cond = parse_exp_1 (&s, block_for_pc (sals.sals[i].pc), 0);
- }
-
- check_duplicates (b->address);
-
- mention (b);
- }
- b->enable = save_enable; /* Restore it, this worked. */
- }
- free ((PTR)sals.sals);
- break;
- case bp_watchpoint:
- /* FIXME! This is the wrong thing to do.... */
- delete_breakpoint (b);
- break;
- default:
- printf_filtered ("Deleting unknown breakpoint type %d\n", b->type);
- case bp_until:
- case bp_finish:
- case bp_longjmp:
- case bp_longjmp_resume:
- delete_breakpoint (b);
- break;
- }
-
- return 0;
- }
-
- /* Re-set all breakpoints after symbols have been re-loaded. */
- void
- breakpoint_re_set ()
- {
- struct breakpoint *b, *temp;
- static char message1[] = "Error in re-setting breakpoint %d:\n";
- char message[sizeof (message1) + 30 /* slop */];
-
- ALL_BREAKPOINTS_SAFE (b, temp)
- {
- sprintf (message, message1, b->number); /* Format possible error msg */
- (void) catch_errors (breakpoint_re_set_one, (char *) b, message);
- }
-
- create_longjmp_breakpoint("longjmp");
- create_longjmp_breakpoint("_longjmp");
- create_longjmp_breakpoint("siglongjmp");
- create_longjmp_breakpoint(NULL);
-
- #if 0
- /* Took this out (temporaliy at least), since it produces an extra
- blank line at startup. This messes up the gdbtests. -PB */
- /* Blank line to finish off all those mention() messages we just printed. */
- printf_filtered ("\n");
- #endif
- }
-
- /* 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;
- {
- char *p = args;
- register int num;
-
- if (p == 0)
- error_no_arg ("a breakpoint number");
-
- num = get_number (&p);
-
- if (*p == 0)
- error ("Second argument (specified ignore-count) is missing.");
-
- set_ignore_count (num,
- longest_to_int (value_as_long (parse_and_eval (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) PARAMS ((struct breakpoint *));
- {
- register char *p = args;
- char *p1;
- register int num;
- register struct breakpoint *b;
-
- if (p == 0)
- error_no_arg ("one or more breakpoint numbers");
-
- while (*p)
- {
- p1 = p;
-
- num = get_number (&p1);
-
- ALL_BREAKPOINTS (b)
- if (b->number == num)
- {
- function (b);
- goto win;
- }
- printf ("No breakpoint number %d.\n", num);
- win:
- p = p1;
- }
- }
-
- static void
- enable_breakpoint (bpt)
- struct breakpoint *bpt;
- {
- bpt->enable = enabled;
-
- if (xgdb_verbose && bpt->type == bp_breakpoint)
- printf ("breakpoint #%d enabled\n", bpt->number);
-
- check_duplicates (bpt->address);
- if (bpt->type == bp_watchpoint)
- {
- if (bpt->exp_valid_block != NULL
- && !contained_in (get_selected_block (), bpt->exp_valid_block))
- {
- printf_filtered ("\
- Cannot enable watchpoint %d because the block in which its expression\n\
- is valid is not currently in scope.\n", bpt->number);
- return;
- }
-
- value_free (bpt->val);
-
- bpt->val = evaluate_expression (bpt->exp);
- release_value (bpt->val);
- }
- }
-
- /* ARGSUSED */
- static void
- enable_command (args, from_tty)
- char *args;
- int from_tty;
- {
- 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->type == bp_breakpoint)
- printf ("breakpoint #%d disabled\n", bpt->number);
-
- check_duplicates (bpt->address);
- }
-
- /* ARGSUSED */
- static void
- disable_command (args, from_tty)
- char *args;
- int from_tty;
- {
- 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 = enabled;
- bpt->disposition = disable;
-
- check_duplicates (bpt->address);
- }
-
- /* ARGSUSED */
- static void
- enable_once_command (args, from_tty)
- char *args;
- int from_tty;
- {
- map_breakpoint_numbers (args, enable_once_breakpoint);
- }
-
- static void
- enable_delete_breakpoint (bpt)
- struct breakpoint *bpt;
- {
- bpt->enable = enabled;
- bpt->disposition = delete;
-
- check_duplicates (bpt->address);
- }
-
- /* ARGSUSED */
- static void
- enable_delete_command (args, from_tty)
- char *args;
- int from_tty;
- {
- 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, (struct symtab *)NULL, 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;
- /* Don't bother to call set_breakpoint_count. $bpnum isn't useful
- before a breakpoint is set. */
- 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 an expression to be evaluated whenever\n\
- breakpoint N is reached. ");
-
- 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.\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.",
- &enablelist, "enable ", 1, &cmdlist);
-
- add_abbrev_prefix_cmd ("breakpoints", class_breakpoint, enable_command,
- "Enable some breakpoints.\n\
- Give breakpoint numbers (separated by spaces) as arguments.\n\
- This is used to cancel the effect of the \"disable\" command.\n\
- May be abbreviated to simply \"enable\".\n",
- &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.\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.",
- &disablelist, "disable ", 1, &cmdlist);
- add_com_alias ("dis", "disable", class_breakpoint, 1);
- add_com_alias ("disa", "disable", class_breakpoint, 1);
-
- add_cmd ("breakpoints", class_alias, disable_command,
- "Disable some breakpoints.\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_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 user-settable breakpoints, or breakpoint number NUMBER.\n\
- The \"Type\" column indicates one of:\n\
- \tbreakpoint - for normal breakpoints\n\
- \twatchpoint - for watchpoints\n\
- The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
- the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
- breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
- address and file/line number respectively.\n\n\
- Convenience variable \"$_\" and default examine address for \"x\"\n\
- are set to the address of the last breakpoint listed.\n\n\
- Convenience variable \"$bpnum\" contains the number of the last\n\
- breakpoint set.");
-
- add_info ("all-breakpoints", all_breakpoints_info,
- "Status of all breakpoints, or breakpoint number NUMBER.\n\
- The \"Type\" column indicates one of:\n\
- \tbreakpoint - for normal breakpoints\n\
- \twatchpoint - for watchpoints\n\
- \tlongjmp - for internal breakpoints to handle stepping through longjmp()\n\
- \tlongjmp resume - for internal breakpoints at the target of longjmp()\n\
- \tuntil - for internal breakpoints used by the \"until\" command\n\
- \tfinish - for internal breakpoints used by the \"finish\" command\n\
- The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
- the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
- breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
- address and file/line number respectively.\n\n\
- Convenience variable \"$_\" and default examine address for \"x\"\n\
- are set to the address of the last breakpoint listed.\n\n\
- Convenience variable \"$bpnum\" contains the number of the last\n\
- breakpoint set.");
-
- add_com ("catch", class_breakpoint, catch_command,
- "Set breakpoints to catch exceptions that are raised.\n\
- Argument may be a single exception to catch, multiple exceptions\n\
- to catch, or the default exception \"default\". If no arguments\n\
- are given, breakpoints are set at all exception handlers catch clauses\n\
- within the current scope.\n\
- \n\
- A condition specified for the catch applies to all breakpoints set\n\
- with this command\n\
- \n\
- Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
-
- add_com ("watch", class_breakpoint, watch_command,
- "Set a watchpoint for an expression.\n\
- A watchpoint stops execution of your program whenever the value of\n\
- an expression changes.");
-
- add_info ("watchpoints", breakpoints_info,
- "Synonym for ``info breakpoints''.");
- }
-
- #ifdef IBM6000_HOST
- /* Where should this function go? It is used by AIX only. FIXME. */
-
- /* Breakpoint address relocation used to be done in breakpoint_re_set(). That
- approach the following problem:
-
- before running the program, if a file is list, then a breakpoint is
- set (just the line number), then if we switch into another file and run
- the program, just a line number as a breakpoint address was not
- descriptive enough and breakpoint was ending up in a different file's
- similar line.
-
- I don't think any other platform has this breakpoint relocation problem, so this
- is not an issue for other platforms. */
-
- void
- fixup_breakpoints (low, high, delta)
- CORE_ADDR low;
- CORE_ADDR high;
- CORE_ADDR delta;
- {
- struct breakpoint *b;
- extern struct breakpoint *breakpoint_chain;
-
- ALL_BREAKPOINTS (b)
- {
- if (b->address >= low && b->address <= high)
- b->address += delta;
- }
- }
- #endif
-