/* Everything about breakpoints, for GDB.
- Copyright (C) 1986, 1987 Free Software Foundation, Inc.
-
-GDB is distributed in the hope that it will be useful, but WITHOUT ANY
-WARRANTY. No author or distributor accepts responsibility to anyone
-for the consequences of using it or for whether it serves any
-particular purpose or works at all, unless he says so in writing.
-Refer to the GDB General Public License for full details.
-
-Everyone is granted permission to copy, modify and redistribute GDB,
-but only under the conditions described in the GDB General Public
-License. A copy of this license is supposed to have been given to you
-along with GDB so you can know your rights and responsibilities. It
-should be in a file named COPYING. Among other things, the copyright
-notice and this notice must be preserved on all copies.
-
-In other words, go ahead and share GDB, but don't try to stop
-anyone else from sharing it farther. Help stamp out software hoarding!
-*/
+ 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 "initialize.h"
-#include "param.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>
+#include "demangle.h"
+
+/* local function prototypes */
-#include <stdio.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.
- `once' means delete when hit. */
-
-enum enable { disabled, enabled, temporary, delete};
-
-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;
- /* 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 (frame). If nonzero, break only if fp equals this. */
- FRAME frame;
- /* Conditional. Break only if this expression's value is nonzero. */
- struct expression *cond;
-};
+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;
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
struct symtab *default_breakpoint_symtab;
int default_breakpoint_line;
-/* Remaining commands (not yet executed)
- of last breakpoint hit. */
-
-struct command_line *breakpoint_commands;
-
-START_FILE
-
-extern char *read_line ();
+/* Flag indicating extra verbosity for xgdb. */
+extern int xgdb_verbose;
+\f
+/* *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 "$" followed by the name
+ of a convenience variable. Making it an expression wouldn't work well
+ for map_breakpoint_numbers (e.g. "4 + 5 + 6"). */
+static int
+get_number (pp)
+ char **pp;
+{
+ int retval;
+ char *p = *pp;
-static void delete_breakpoint ();
-void clear_momentary_breakpoints ();
-void breakpoint_auto_delete ();
+ if (p == NULL)
+ /* Empty line means refer to the last breakpoint. */
+ return breakpoint_count;
+ else if (*p == '$')
+ {
+ /* 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;
+}
\f
/* condition N EXP -- set break condition of breakpoint N to EXP. */
int from_tty;
{
register struct breakpoint *b;
- register char *p;
+ 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++;
- bnum = atoi (arg);
+ bnum = get_number (&p);
ALL_BREAKPOINTS (b)
if (b->number == bnum)
{
if (b->cond)
- free (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);
+ printf_filtered ("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);
+ /* 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");
}
error ("No breakpoint number %d.", bnum);
}
+/* ARGSUSED */
static void
-commands_command (arg)
+commands_command (arg, from_tty)
char *arg;
+ int from_tty;
{
register struct breakpoint *b;
- register char *p, *p1;
+ char *p;
register int bnum;
struct command_line *l;
- if (arg == 0)
- error_no_arg ("breakpoint number");
-
/* 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)
+ if (executing_breakpoint_commands)
error ("Can't use the \"commands\" command among a breakpoint's commands.");
p = arg;
- if (! (*p >= '0' && *p <= '9'))
- error ("Argument must be integer (a breakpoint number).");
-
- while (*p >= '0' && *p <= '9') p++;
- if (*p)
+ bnum = get_number (&p);
+ if (p && *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\
+ if (from_tty && input_from_terminal_p ())
+ printf_filtered ("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;
}
error ("No breakpoint number %d.", bnum);
}
+\f
+extern int memory_breakpoint_size; /* from mem-break.c */
-/* Called from command loop to execute the commands
- associated with the breakpoint we just stopped at. */
+/* Like target_read_memory() but if breakpoints are inserted, return
+ the shadow contents instead of the breakpoints themselves.
-void
-do_breakpoint_commands ()
+ 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;
{
- while (breakpoint_commands)
+ int status;
+ struct breakpoint *b;
+
+ if (memory_breakpoint_size < 0)
+ /* No breakpoints on this machine. FIXME: This should be
+ dependent on the debugging target. Probably want
+ target_insert_breakpoint to return a size, saying how many
+ bytes of the shadow contents are used, or perhaps have
+ something like target_xfer_shadow. */
+ return target_read_memory (memaddr, myaddr, len);
+
+ ALL_BREAKPOINTS (b)
{
- 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. */
+ 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;
+ }
-void
-clear_breakpoint_commands ()
-{
- breakpoint_commands = 0;
- breakpoint_auto_delete (0);
-}
+ if (membpt + bptlen > memaddr + len)
+ {
+ /* Only copy the first part of the breakpoint. */
+ bptlen -= (membpt + bptlen) - (memaddr + len);
+ }
-/* 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. */
+ memcpy (myaddr + membpt - memaddr,
+ b->shadow_contents + bptoffset, bptlen);
-struct command_line *
-get_breakpoint_commands ()
-{
- return breakpoint_commands;
-}
+ if (membpt > memaddr)
+ {
+ /* Copy the section of memory before the breakpoint. */
+ status = read_memory_nobpt (memaddr, myaddr, membpt - memaddr);
+ if (status != 0)
+ return status;
+ }
-void
-set_breakpoint_commands (cmds)
- struct command_line *cmds;
-{
- breakpoint_commands = cmds;
+ 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);
}
\f
/* insert_breakpoints is used when starting or continuing the program.
insert_breakpoints ()
{
register struct breakpoint *b;
- int val;
+ int val = 0;
+ int disabled_breaks = 0;
-/* printf ("Inserting breakpoints.\n"); */
ALL_BREAKPOINTS (b)
- if (b->enable != disabled && ! b->inserted && ! b->duplicate)
+ if (b->type != bp_watchpoint
+ && 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);
+ val = target_insert_breakpoint(b->address, b->shadow_contents);
if (val)
- return val;
-/* printf ("Inserted breakpoint at 0x%x, shadow 0x%x, 0x%x.\n",
- b->address, b->shadow_contents[0], b->shadow_contents[1]); */
- b->inserted = 1;
+ {
+ /* 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;
}
- return 0;
+ if (disabled_breaks)
+ printf_filtered ("\n");
+ return val;
}
int
register struct breakpoint *b;
int val;
-/* printf ("Removing breakpoints.\n"); */
+#ifdef BREAKPOINT_DEBUG
+ printf ("Removing breakpoints.\n");
+#endif /* BREAKPOINT_DEBUG */
+
ALL_BREAKPOINTS (b)
- if (b->inserted)
+ if (b->type != bp_watchpoint && b->inserted)
{
- val = write_memory (b->address, b->shadow_contents, sizeof break_insn);
+ val = target_remove_breakpoint(b->address, b->shadow_contents);
if (val)
return val;
b->inserted = 0;
-/* printf ("Removed breakpoint at 0x%x, shadow 0x%x, 0x%x.\n",
- b->address, b->shadow_contents[0], b->shadow_contents[1]); */
+#ifdef BREAKPOINT_DEBUG
+ printf ("Removed breakpoint at %s",
+ local_hex_string((unsigned long) b->address));
+ printf (", shadow %s",
+ local_hex_string((unsigned long) b->shadow_contents[0]));
+ printf (", %s.\n",
+ local_hex_string((unsigned long) b->shadow_contents[1]));
+#endif /* BREAKPOINT_DEBUG */
}
return 0;
}
-/* Clear the "inserted" flag in all breakpoints.
- This is done when the inferior is loaded. */
+/* Clear the "inserted" flag in all breakpoints. */
-int
+void
mark_breakpoints_out ()
{
register struct breakpoint *b;
b->inserted = 0;
}
+/* Clear the "inserted" flag in all breakpoints and delete any breakpoints
+ which should go away between runs of the program. */
+
+void
+breakpoint_init_inferior ()
+{
+ register struct breakpoint *b, *temp;
+
+ ALL_BREAKPOINTS_SAFE (b, temp)
+ {
+ b->inserted = 0;
+
+ /* If the call dummy breakpoint is at the entry point it will
+ cause problems when the inferior is rerun, so we better
+ get rid of it. */
+ if (b->type == bp_call_dummy)
+ delete_breakpoint (b);
+ }
+}
+
/* 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. */
return 0;
}
+\f
+/* bpstat stuff. External routines' interfaces are documented
+ in breakpoint.h. */
-/* Evaluate the expression EXP and return 1 if value is zero.
- This is used inside a catch_errors to evaluate the breakpoint condition. */
+/* Clear a bpstat so that it says we are not at any breakpoint.
+ Also free any storage that is part of a bpstat. */
-int
-breakpoint_cond_eval (exp)
- struct expression *exp;
+void
+bpstat_clear (bsp)
+ bpstat *bsp;
{
- return value_zerop (evaluate_expression (exp));
+ 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 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 for a silent breakpoint. */
+/* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
+ is part of the bpstat is copied as well. */
-int
-breakpoint_stop_status (pc, frame)
- CORE_ADDR pc;
- FRAME frame;
+bpstat
+bpstat_copy (bs)
+ bpstat bs;
{
- register struct breakpoint *b;
- register int cont = 0;
+ bpstat p = NULL;
+ bpstat tmp;
+ bpstat retval = NULL;
- /* 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)
- cont = -1;
- else
- {
- int value_zero;
- if (b->cond)
- {
- 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 (breakpoint_commands
- && !strcmp ("silent", breakpoint_commands->line))
- {
- breakpoint_commands = breakpoint_commands->next;
- return 0x1000000 + b->number;
- }
- return b->number;
- }
- }
- }
+ if (bs == NULL)
+ return bs;
- return cont;
+ for (; bs != NULL; bs = bs->next)
+ {
+ tmp = (bpstat) xmalloc (sizeof (*tmp));
+ memcpy (tmp, bs, 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;
}
-\f
-static void
-breakpoint_1 (bnum)
- int bnum;
-{
- register struct breakpoint *b;
- register struct command_line *l;
- register struct symbol *sym;
- CORE_ADDR last_addr = -1;
- ALL_BREAKPOINTS (b)
- if (bnum == -1 || bnum == b->number)
- {
- printf ("#%-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 (" in %s (%s line %d)", SYMBOL_NAME (sym),
- b->symtab->filename, b->line_number);
- else
- printf ("%s line %d", b->symtab->filename, b->line_number);
- }
- printf ("\n");
+/* Find the bpstat associated with this breakpoint */
- if (b->ignore_count)
- printf ("\tignore next %d hits\n", b->ignore_count);
- if (b->frame)
- printf ("\tstop only in stack frame at 0x%x\n", b->frame);
- if (b->cond)
- {
- printf ("\tbreak only if ");
- print_expression (b->cond, stdout);
- printf ("\n");
- }
- if (l = b->commands)
- while (l)
- {
- printf ("\t%s\n", l->line);
- l = l->next;
- }
- }
+bpstat
+bpstat_find_breakpoint(bsp, breakpoint)
+ bpstat bsp;
+ struct breakpoint *breakpoint;
+{
+ if (bsp == NULL) return NULL;
- if (last_addr != -1)
- set_next_address (last_addr);
+ for (;bsp != NULL; bsp = bsp->next) {
+ if (bsp->breakpoint_at == breakpoint) return bsp;
+ }
+ return NULL;
}
-static void
-breakpoints_info (bnum_exp)
- char *bnum_exp;
+/* 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;
{
- int bnum = -1;
+ struct breakpoint *b;
- if (bnum_exp)
- bnum = parse_and_eval_address (bnum_exp);
- else if (breakpoint_chain == 0)
- printf ("No breakpoints.\n");
+ if ((*bsp) == NULL)
+ return 0; /* No more breakpoint values */
else
- printf ("Breakpoints:\n\
-Num Enb Address Where\n");
-
- breakpoint_1 (bnum);
+ {
+ 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 */
+ }
}
-/* Print a message describing any breakpoints set at PC. */
+/* Modify BS so that the actions will not be performed. */
-static void
-describe_other_breakpoints (pc)
- register CORE_ADDR pc;
+void
+bpstat_clear_actions (bs)
+ bpstat bs;
{
- register int others = 0;
- register struct breakpoint *b;
-
- ALL_BREAKPOINTS (b)
- if (b->address == pc)
- others++;
- if (others > 0)
+ for (; bs != NULL; bs = bs->next)
{
- 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);
+ bs->commands = NULL;
+ if (bs->old_val != NULL)
+ {
+ value_free (bs->old_val);
+ bs->old_val = NULL;
+ }
}
}
-\f
-/* 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;
+/* Stub for cleaning up our state if we error-out of a breakpoint command */
+/* ARGSUSED */
+static void
+cleanup_executing_breakpoints (ignore)
+ int ignore;
{
- default_breakpoint_valid = valid;
- default_breakpoint_address = addr;
+ 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);
+}
+
+/* This is the normal print_it function for a bpstat. In the future,
+ much of this logic could (should?) be moved to bpstat_stop_status,
+ by having it set different print_it functions. */
+
+static int
+print_it_normal (bs)
+ bpstat bs;
+{
+ /* bs->breakpoint_at can be NULL if it was a momentary breakpoint
+ which has since been deleted. */
+ if (bs->breakpoint_at == NULL
+ || (bs->breakpoint_at->type != bp_breakpoint
+ && bs->breakpoint_at->type != bp_watchpoint))
+ 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 0;
+ }
+ /* We can't deal with it. Maybe another member of the bpstat chain can. */
+ return -1;
+}
+
+/* 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). */
+/* Currently we always return zero. */
+int
+bpstat_print (bs)
+ bpstat bs;
+{
+ int val;
+
+ if (bs == NULL)
+ return 0;
+
+ val = (*bs->print_it) (bs);
+ if (val >= 0)
+ return val;
+
+ /* 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);
+
+ /* We reached the end of the chain without printing anything. */
+ 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->old_val = NULL;
+ bs->print_it = print_it_normal;
+ return bs;
+}
+\f
+/* Return the frame which we can use to evaluate the expression
+ whose valid block is valid_block, or NULL if not in scope.
+
+ This whole concept is probably not the way to do things (it is incredibly
+ slow being the main reason, not to mention fragile (e.g. the sparc
+ frame pointer being fetched as 0 bug causes it to stop)). Instead,
+ introduce a version of "struct frame" which survives over calls to the
+ inferior, but which is better than FRAME_ADDR in the sense that it lets
+ us evaluate expressions relative to that frame (on some machines, it
+ can just be a FRAME_ADDR). Save one of those instead of (or in addition
+ to) the exp_valid_block, and then use it to evaluate the watchpoint
+ expression, with no need to do all this backtracing every time.
+
+ Or better yet, what if it just copied the struct frame and its next
+ frame? Off the top of my head, I would think that would work
+ because things like (a29k) rsize and msize, or (sparc) bottom just
+ depend on the frame, and aren't going to be different just because
+ the inferior has done something. Trying to recalculate them
+ strikes me as a lot of work, possibly even impossible. Saving the
+ next frame is needed at least on a29k, where get_saved_register
+ uses fi->next->saved_msp. For figuring out whether that frame is
+ still on the stack, I guess this needs to be machine-specific (e.g.
+ a29k) but I think
+
+ read_fp () INNER_THAN watchpoint_frame->frame
+
+ would generally work.
+
+ Of course the scope of the expression could be less than a whole
+ function; perhaps if the innermost frame is the one which the
+ watchpoint is relative to (another machine-specific thing, usually
+
+ FRAMELESS_FUNCTION_INVOCATION (get_current_frame(), fromleaf)
+ read_fp () == wp_frame->frame
+ && !fromleaf
+
+ ), *then* it could do a
+
+ contained_in (get_current_block (), wp->exp_valid_block).
+
+ */
+
+FRAME
+within_scope (valid_block)
+ struct block *valid_block;
+{
+ FRAME fr = get_current_frame ();
+ struct frame_info *fi = get_frame_info (fr);
+ CORE_ADDR func_start;
+
+ /* If caller_pc_valid is true, we are stepping through
+ a function prologue, which is bounded by callee_func_start
+ (inclusive) and callee_prologue_end (exclusive).
+ caller_pc is the pc of the caller.
+
+ Yes, this is hairy. */
+ static int caller_pc_valid = 0;
+ static CORE_ADDR caller_pc;
+ static CORE_ADDR callee_func_start;
+ static CORE_ADDR callee_prologue_end;
+
+ find_pc_partial_function (fi->pc, (PTR)NULL, &func_start, (CORE_ADDR *)NULL);
+ func_start += FUNCTION_START_OFFSET;
+ if (fi->pc == func_start)
+ {
+ /* We just called a function. The only other case I
+ can think of where the pc would equal the pc of the
+ start of a function is a frameless function (i.e.
+ no prologue) where we branch back to the start
+ of the function. In that case, SKIP_PROLOGUE won't
+ find one, and we'll clear caller_pc_valid a few lines
+ down. */
+ caller_pc_valid = 1;
+ caller_pc = SAVED_PC_AFTER_CALL (fr);
+ callee_func_start = func_start;
+ SKIP_PROLOGUE (func_start);
+ callee_prologue_end = func_start;
+ }
+ if (caller_pc_valid)
+ {
+ if (fi->pc < callee_func_start
+ || fi->pc >= callee_prologue_end)
+ caller_pc_valid = 0;
+ }
+
+ if (contained_in (block_for_pc (caller_pc_valid
+ ? caller_pc
+ : fi->pc),
+ valid_block))
+ {
+ return fr;
+ }
+ fr = get_prev_frame (fr);
+
+ /* If any active frame is in the exp_valid_block, then it's
+ OK. Note that this might not be the same invocation of
+ the exp_valid_block that we were watching a little while
+ ago, or the same one as when the watchpoint was set (e.g.
+ we are watching a local variable in a recursive function.
+ When we return from a recursive invocation, then we are
+ suddenly watching a different instance of the variable).
+
+ At least for now I am going to consider this a feature. */
+ for (; fr != NULL; fr = get_prev_frame (fr))
+ {
+ fi = get_frame_info (fr);
+ if (contained_in (block_for_pc (fi->pc),
+ valid_block))
+ {
+ return fr;
+ }
+ }
+ return NULL;
+}
+
+/* Possible return values for watchpoint_check (this can't be an enum
+ because of check_errors). */
+/* The watchpoint has been disabled. */
+#define WP_DISABLED 1
+/* The value has changed. */
+#define WP_VALUE_CHANGED 2
+/* The value has not changed. */
+#define WP_VALUE_NOT_CHANGED 3
+
+/* Check watchpoint condition. */
+static int
+watchpoint_check (p)
+ char *p;
+{
+ bpstat bs = (bpstat) p;
+ FRAME fr;
+
+ int within_current_scope;
+ if (bs->breakpoint_at->exp_valid_block == NULL)
+ within_current_scope = 1;
+ else
+ {
+ fr = within_scope (bs->breakpoint_at->exp_valid_block);
+ within_current_scope = fr != NULL;
+ if (within_current_scope)
+ /* If we end up stopping, the current frame will get selected
+ in normal_stop. So this call to select_frame won't affect
+ the user. */
+ select_frame (fr, -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. We can't call free_all_values because
+ we might be in the middle of evaluating a function call. */
+
+ value mark = value_mark ();
+ value new_val = evaluate_expression (bs->breakpoint_at->exp);
+ if (!value_equal (bs->breakpoint_at->val, new_val))
+ {
+ release_value (new_val);
+ value_free_to_mark (mark);
+ bs->old_val = bs->breakpoint_at->val;
+ bs->breakpoint_at->val = new_val;
+ /* We will stop here */
+ return WP_VALUE_CHANGED;
+ }
+ else
+ {
+ /* Nothing changed, don't do anything. */
+ value_free_to_mark (mark);
+ /* We won't stop here */
+ return WP_VALUE_NOT_CHANGED;
+ }
+ }
+ 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). */
+ bs->breakpoint_at->enable = disabled;
+ printf_filtered ("\
+Watchpoint %d disabled because the program has left the block in\n\
+which its expression is valid.\n", bs->breakpoint_at->number);
+ return WP_DISABLED;
+ }
+}
+
+/* This is used when everything which needs to be printed has
+ already been printed. But we still want to print the frame. */
+static int
+print_it_done (bs)
+ bpstat bs;
+{
+ return 0;
+}
+
+/* This is used when nothing should be printed for this bpstat entry. */
+
+static int
+print_it_noop (bs)
+ bpstat bs;
+{
+ return -1;
+}
+
+/* Get a bpstat associated with having just stopped at address *PC
+ and frame address FRAME_ADDRESS. Update *PC to point at the
+ breakpoint (if we hit a breakpoint). NOT_A_BREAKPOINT is nonzero
+ if this is known to not be a real breakpoint (it could still be a
+ watchpoint, though). */
+
+/* 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.
+
+ Each element of the chain refers to a particular breakpoint or
+ watchpoint at which we have stopped. (We may have stopped for
+ several reasons concurrently.)
+
+ Each element of the chain has valid next, breakpoint_at,
+ commands, FIXME??? fields.
+
+ */
+
+bpstat
+bpstat_stop_status (pc, frame_address, not_a_breakpoint)
+ CORE_ADDR *pc;
+ FRAME_ADDR frame_address;
+ int not_a_breakpoint;
+{
+ register struct breakpoint *b;
+ 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)
+ {
+ if (b->enable == disabled)
+ continue;
+
+ if (b->type != bp_watchpoint && b->address != bp_addr)
+ continue;
+
+ if (b->type != bp_watchpoint && not_a_breakpoint)
+ 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 */
+
+ bs->stop = 1;
+ bs->print = 1;
+
+ if (b->type == bp_watchpoint)
+ {
+ static char message1[] =
+ "Error evaluating expression for watchpoint %d\n";
+ char message[sizeof (message1) + 30 /* slop */];
+ sprintf (message, message1, b->number);
+ switch (catch_errors (watchpoint_check, (char *) bs, message,
+ RETURN_MASK_ALL))
+ {
+ case WP_DISABLED:
+ /* We've already printed what needs to be printed. */
+ bs->print_it = print_it_done;
+ /* Stop. */
+ break;
+ case WP_VALUE_CHANGED:
+ /* Stop. */
+ break;
+ case WP_VALUE_NOT_CHANGED:
+ /* Don't stop. */
+ bs->print_it = print_it_noop;
+ bs->stop = 0;
+ continue;
+ default:
+ /* Can't happen. */
+ /* FALLTHROUGH */
+ case 0:
+ /* Error from catch_errors. */
+ b->enable = disabled;
+ printf_filtered ("Watchpoint %d disabled.\n", b->number);
+ /* We've already printed what needs to be printed. */
+ bs->print_it = print_it_done;
+ /* Stop. */
+ break;
+ }
+ }
+#if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS)
+ else
+ real_breakpoint = 1;
+#endif
+
+ if (b->frame && b->frame != frame_address)
+ bs->stop = 0;
+ else
+ {
+ int value_is_zero = 0;
+
+ 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",
+ RETURN_MASK_ALL);
+ /* FIXME-someday, should give breakpoint # */
+ free_all_values ();
+ }
+ if (b->cond && value_is_zero)
+ {
+ bs->stop = 0;
+ }
+ else if (b->ignore_count > 0)
+ {
+ b->ignore_count--;
+ bs->stop = 0;
+ }
+ else
+ {
+ /* We will stop here */
+ if (b->disposition == disable)
+ b->enable = disabled;
+ bs->commands = b->commands;
+ if (b->silent)
+ bs->print = 0;
+ if (bs->commands && STREQ ("silent", bs->commands->line))
+ {
+ bs->commands = bs->commands->next;
+ bs->print = 0;
+ }
+ }
+ }
+ /* Print nothing for this entry if we dont stop or if we dont print. */
+ if (bs->stop == 0 || bs->print == 0)
+ bs->print_it = print_it_noop;
+ }
+
+ bs->next = NULL; /* Terminate the chain */
+ bs = root_bs->next; /* Re-grab the head of the chain */
+#if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS)
+ if (bs)
+ {
+ if (real_breakpoint)
+ {
+ *pc = bp_addr;
+#if defined (SHIFT_INST_REGS)
+ SHIFT_INST_REGS();
+#else /* No SHIFT_INST_REGS. */
+ write_pc (bp_addr);
+#endif /* No SHIFT_INST_REGS. */
+ }
+ }
+#endif /* DECR_PC_AFTER_BREAK != 0. */
+ return bs;
+}
+\f
+/* Tell what to do about this bpstat. */
+struct bpstat_what
+bpstat_what (bs)
+ bpstat bs;
+{
+ /* Classify each bpstat as one of the following. */
+ enum class {
+ /* This bpstat element has no effect on the main_action. */
+ no_effect = 0,
+
+ /* There was a watchpoint, stop but don't print. */
+ wp_silent,
+
+ /* There was a watchpoint, stop and print. */
+ wp_noisy,
+
+ /* There was a breakpoint but we're not stopping. */
+ bp_nostop,
+
+ /* There was a breakpoint, stop but don't print. */
+ bp_silent,
+
+ /* There was a breakpoint, stop and print. */
+ bp_noisy,
+
+ /* We hit the longjmp breakpoint. */
+ long_jump,
+
+ /* We hit the longjmp_resume breakpoint. */
+ long_resume,
+
+ /* This is just used to count how many enums there are. */
+ class_last
+ };
+
+ /* Here is the table which drives this routine. So that we can
+ format it pretty, we define some abbreviations for the
+ enum bpstat_what codes. */
+#define keep_c BPSTAT_WHAT_KEEP_CHECKING
+#define stop_s BPSTAT_WHAT_STOP_SILENT
+#define stop_n BPSTAT_WHAT_STOP_NOISY
+#define single BPSTAT_WHAT_SINGLE
+#define setlr BPSTAT_WHAT_SET_LONGJMP_RESUME
+#define clrlr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
+#define clrlrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
+/* "Can't happen." Might want to print an error message.
+ abort() is not out of the question, but chances are GDB is just
+ a bit confused, not unusable. */
+#define err BPSTAT_WHAT_STOP_NOISY
+
+ /* Given an old action and a class, come up with a new action. */
+ /* One interesting property of this table is that wp_silent is the same
+ as bp_silent and wp_noisy is the same as bp_noisy. That is because
+ after stopping, the check for whether to step over a breakpoint
+ (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
+ reference to how we stopped. We retain separate wp_silent and bp_silent
+ codes in case we want to change that someday. */
+ static const enum bpstat_what_main_action
+ table[(int)class_last][(int)BPSTAT_WHAT_LAST] =
+ {
+ /* old action */
+ /* keep_c stop_s stop_n single setlr clrlr clrlrs */
+
+/*no_effect*/ {keep_c, stop_s, stop_n, single, setlr , clrlr , clrlrs},
+/*wp_silent*/ {stop_s, stop_s, stop_n, stop_s, stop_s, stop_s, stop_s},
+/*wp_noisy*/ {stop_n, stop_n, stop_n, stop_n, stop_n, stop_n, stop_n},
+/*bp_nostop*/ {single, stop_s, stop_n, single, setlr , clrlrs, clrlrs},
+/*bp_silent*/ {stop_s, stop_s, stop_n, stop_s, stop_s, stop_s, stop_s},
+/*bp_noisy*/ {stop_n, stop_n, stop_n, stop_n, stop_n, stop_n, stop_n},
+/*long_jump*/ {setlr , stop_s, stop_n, setlr , err , err , err },
+/*long_resume*/ {clrlr , stop_s, stop_n, clrlrs, err , err , err }
+ };
+#undef keep_c
+#undef stop_s
+#undef stop_n
+#undef single
+#undef setlr
+#undef clrlr
+#undef clrlrs
+#undef err
+ enum bpstat_what_main_action current_action = BPSTAT_WHAT_KEEP_CHECKING;
+ struct bpstat_what retval;
+
+ retval.call_dummy = 0;
+ retval.step_resume = 0;
+ for (; bs != NULL; bs = bs->next)
+ {
+ enum class bs_class = no_effect;
+ if (bs->breakpoint_at == NULL)
+ /* I suspect this can happen if it was a momentary breakpoint
+ which has since been deleted. */
+ continue;
+ switch (bs->breakpoint_at->type)
+ {
+ case bp_breakpoint:
+ case bp_until:
+ case bp_finish:
+ if (bs->stop)
+ {
+ if (bs->print)
+ bs_class = bp_noisy;
+ else
+ bs_class = bp_silent;
+ }
+ else
+ bs_class = bp_nostop;
+ break;
+ case bp_watchpoint:
+ if (bs->stop)
+ {
+ if (bs->print)
+ bs_class = wp_noisy;
+ else
+ bs_class = wp_silent;
+ }
+ else
+ /* There was a watchpoint, but we're not stopping. This requires
+ no further action. */
+ bs_class = no_effect;
+ break;
+ case bp_longjmp:
+ bs_class = long_jump;
+ break;
+ case bp_longjmp_resume:
+ bs_class = long_resume;
+ break;
+ case bp_step_resume:
+#if 0
+ /* Need to temporarily disable this until we can fix the bug
+ with nexting over a breakpoint with ->stop clear causing
+ an infinite loop. For now, treat the breakpoint as having
+ been hit even if the frame is wrong. */
+ if (bs->stop)
+ {
+#endif
+ retval.step_resume = 1;
+ /* We don't handle this via the main_action. */
+ bs_class = no_effect;
+#if 0
+ }
+ else
+ /* It is for the wrong frame. */
+ bs_class = bp_nostop;
+#endif
+ break;
+ case bp_call_dummy:
+ /* Make sure the action is stop (silent or noisy), so infrun.c
+ pops the dummy frame. */
+ bs_class = bp_silent;
+ retval.call_dummy = 1;
+ break;
+ }
+ current_action = table[(int)bs_class][(int)current_action];
+ }
+ retval.main_action = current_action;
+ return retval;
+}
+
+/* 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;
+}
+\f
+/* 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", "step resume",
+ "call dummy" };
+ static char *bpdisps[] = {"del", "dis", "keep"};
+ static char bpenables[] = "ny";
+ char wrap_indent[80];
+
+ 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]);
+ strcpy (wrap_indent, " ");
+ if (addressprint)
+ strcat (wrap_indent, " ");
+ 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:
+ case bp_step_resume:
+ case bp_call_dummy:
+ if (addressprint)
+ printf_filtered ("%s ", local_hex_string_custom ((unsigned long) b->address, "08l"));
+
+ last_addr = b->address;
+ if (b->source_file)
+ {
+ sym = find_pc_function (b->address);
+ if (sym)
+ {
+ fputs_filtered ("in ", stdout);
+ fputs_filtered (SYMBOL_SOURCE_NAME (sym), stdout);
+ wrap_here (wrap_indent);
+ fputs_filtered (" at ", stdout);
+ }
+ fputs_filtered (b->source_file, stdout);
+ printf_filtered (":%d", b->line_number);
+ }
+ else
+ print_address_symbolic (b->address, stdout, demangle, " ");
+ break;
+ }
+
+ printf_filtered ("\n");
+
+ if (b->frame)
+ printf_filtered ("\tstop only in stack frame at %s\n",
+ local_hex_string((unsigned long) 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)
+ {
+ if (bnum == -1)
+ printf_filtered ("No breakpoints or watchpoints.\n");
+ else
+ 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);
+}
+
+#if MAINTENANCE_CMDS
+
+/* ARGSUSED */
+static void
+maintenance_info_breakpoints (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);
+}
+
+#endif
+
+/* 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((unsigned long) pc));
+ }
+}
+\f
+/* 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;
}
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)
{
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. */
+ 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)
register struct breakpoint *b, *b1;
b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint));
- bzero (b, sizeof *b);
+ memset (b, 0, sizeof (*b));
b->address = sal.pc;
- b->symtab = sal.symtab;
+ if (sal.symtab == NULL)
+ b->source_file = NULL;
+ else
+ b->source_file = savestring (sal.symtab->filename,
+ strlen (sal.symtab->filename));
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
breakpoint_chain = b;
else
{
- while (b1->next)
- b1 = b1->next;
- b1->next = b;
- }
+ 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 = SYMBOL_VALUE_ADDRESS (m);
+ 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;
+ check_duplicates (b->address);
+ }
+}
+
+void
+disable_longjmp_breakpoint()
+{
+ register struct breakpoint *b;
+
+ ALL_BREAKPOINTS (b)
+ if ( b->type == bp_longjmp
+ || b->type == bp_longjmp_resume)
+ {
+ b->enable = disabled;
+ check_duplicates (b->address);
+ }
+}
+
+/* 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;
+ check_duplicates (b->address);
+ 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
+\f
+/* 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((unsigned long) b->address));
+ if (b->source_file)
+ printf_filtered (": file %s, line %d.",
+ b->source_file, b->line_number);
+ break;
+ case bp_until:
+ case bp_finish:
+ case bp_longjmp:
+ case bp_longjmp_resume:
+ case bp_step_resume:
+ break;
+ }
+ 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 */
+\f
+/* 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 = NULL;
+ /* Pointers in arg to the start, and one past the end,
+ of the address part. */
+ char *addr_start = NULL;
+ char *addr_end = NULL;
+ struct cleanup *old_chain;
+ struct cleanup *canonical_strings_chain = NULL;
+ char **canonical = (char **)NULL;
+
+ 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, &canonical);
+ else
+ sals = decode_line_1 (&arg, 1, (struct symtab *)NULL, 0, &canonical);
+
+ addr_end = arg;
+ }
+
+ if (! sals.nelts)
+ return;
+
+ /* Make sure that all storage allocated in decode_line_1 gets freed in case
+ the following `for' loop errors out. */
+ old_chain = make_cleanup (free, sals.sals);
+ if (canonical != (char **)NULL)
+ {
+ make_cleanup (free, canonical);
+ canonical_strings_chain = make_cleanup (null_cleanup, 0);
+ for (i = 0; i < sals.nelts; i++)
+ {
+ if (canonical[i] != NULL)
+ make_cleanup (free, canonical[i]);
+ }
+ }
+
+ /* 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.");
+ }
+ }
+
+ /* Remove the canonical strings from the cleanup, they are needed below. */
+ if (canonical != (char **)NULL)
+ discard_cleanups (canonical_strings_chain);
+
+ /* 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 a canonical line spec is needed use that instead of the
+ command string. */
+ if (canonical != (char **)NULL && canonical[i] != NULL)
+ b->addr_string = canonical[i];
+ else 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");
+ }
+ do_cleanups (old_chain);
+}
+
+/* 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);
+ if (VALUE_LAZY (val))
+ value_fetch_lazy (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;
+ b->exp_string = savestring (arg, strlen (arg));
+ mention (b);
+}
+\f
+/*
+ * 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, (char ***)NULL);
+ else
+ sals = decode_line_1 (&arg, 1, (struct symtab *)NULL, 0, (char ***)NULL);
+
+ 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);
+}
+\f
+#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;
- check_duplicates (sal.pc);
+ if (isalpha (*p1))
+ {
+ p1++;
+ while (isalnum (*p1) || *p1 == '_' || *p1 == '$')
+ p1++;
+ }
- return b;
+ 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 */
-/* Set a breakpoint that will evaporate an end of command
- at address specified by SAL.
- Restrict it to frame FRAME if FRAME is nonzero. */
+/* This shares a lot of code with `print_frame_label_vars' from stack.c. */
-void
-set_momentary_breakpoint (sal, frame)
- struct symtab_and_line sal;
- FRAME frame;
+static struct symtabs_and_lines
+get_catch_sals (this_level_only)
+ int this_level_only;
{
- register struct breakpoint *b;
- b = set_raw_breakpoint (sal);
- b->number = -3;
- b->enable = delete;
- b->frame = frame;
-}
+ 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;
-void
-clear_momentary_breakpoints ()
-{
- register struct breakpoint *b;
- ALL_BREAKPOINTS (b)
- if (b->number == -3)
- {
- delete_breakpoint (b);
- break;
- }
-}
-\f
-/* 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. */
+ /* 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;
-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
+ 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));
+ memset (blocks_searched, 0, BLOCKVECTOR_NBLOCKS (bl) * sizeof (char));
+
+ while (block != 0)
{
- describe_other_breakpoints (sal.pc);
+ 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 (STREQ (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;
- 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");
+ /* 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;
}
-\f
-/* Set a breakpoint according to ARG (function, linenum or *address)
- and make it temporary if TEMPFLAG is nonzero.
- LINE_NUM is for C++. */
+/* Commands to deal with catching exceptions. */
static void
-break_command_1 (arg, tempflag, from_tty, line_num)
+catch_command_1 (arg, tempflag, from_tty)
char *arg;
- int tempflag, from_tty, line_num;
+ 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;
char *save_arg;
int i;
- sals.sals = NULL;
- sals.nelts = 0;
-
sal.line = sal.pc = sal.end = 0;
sal.symtab = 0;
- if (arg)
+ /* 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')))
{
- CORE_ADDR pc;
- sals = decode_line_1 (&arg, 1, 0, 0);
+ /* Grab all active catch clauses. */
+ sals = get_catch_sals (0);
+ }
+ else
+ {
+ /* Grab selected catch clauses. */
+ error ("catch NAME not implemented");
+#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++)
- {
- 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;
+ if (! sals.nelts)
+ return;
- while (*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;
- }
- }
- else if (default_breakpoint_valid)
+ save_arg = arg;
+ for (i = 0; i < sals.nelts; i++)
{
- 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;
+ 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;
}
- else
- error ("No default breakpoint address now.");
for (i = 0; i < sals.nelts; i++)
{
sal = sals.sals[i];
- sal.line += line_num; /** C++ **/
- if (line_num != 0)
- { /* get the pc for a particular line */
- sal.pc = find_line_pc (sal.symtab, sal.line);
- }
if (from_tty)
describe_other_breakpoints (sal.pc);
b = set_raw_breakpoint (sal);
- b->number = ++breakpoint_count;
+ set_breakpoint_count (breakpoint_count + 1);
+ b->number = breakpoint_count;
+ b->type = bp_breakpoint;
b->cond = cond;
- if (tempflag)
- b->enable = temporary;
+ b->enable = enabled;
+ b->disposition = tempflag ? delete : donttouch;
+
+ mention (b);
+ }
- 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);
+ 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
-break_command (arg, from_tty)
- char *arg;
- int from_tty;
+disable_catch (args)
+ char *args;
{
- break_command_1 (arg, 0, from_tty, 0);
+ /* Map the disable command to catch clauses described in ARGS. */
}
+/* Enable breakpoints on all catch clauses described in ARGS. */
static void
-tbreak_command (arg, from_tty)
+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;
{
- break_command_1 (arg, 1, from_tty, 0);
+ catch_command_1 (arg, 0, from_tty);
}
\f
static void
int i;
if (arg)
- sals = decode_line_spec (arg, 1);
+ {
+ sals = decode_line_spec (arg, 1);
+ }
else
{
- sals.sals = (struct symtab_and_line *) malloc (sizeof (struct symtab_and_line));
+ 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;
sal = sals.sals[i];
found = (struct breakpoint *) 0;
while (breakpoint_chain
- && (sal.pc ? breakpoint_chain->address == sal.pc
- : (breakpoint_chain->symtab == sal.symtab
+ && (sal.pc
+ ? breakpoint_chain->address == sal.pc
+ : (breakpoint_chain->source_file != NULL
+ && sal.symtab != NULL
+ && STREQ (breakpoint_chain->source_file,
+ sal.symtab->filename)
&& breakpoint_chain->line_number == sal.line)))
{
b1 = breakpoint_chain;
ALL_BREAKPOINTS (b)
while (b->next
- && (sal.pc ? b->next->address == sal.pc
- : (b->next->symtab == sal.symtab
+ && b->next->type != bp_watchpoint
+ && (sal.pc
+ ? b->next->address == sal.pc
+ : (b->next->source_file != NULL
+ && sal.symtab != NULL
+ && STREQ (b->next->source_file, sal.symtab->filename)
&& b->next->line_number == sal.line)))
{
b1 = b->next;
}
if (found == 0)
- error ("No breakpoint at %s.", arg);
+ {
+ 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" : "");
}
if (from_tty) putchar ('\n');
}
- free (sals.sals);
+ free ((PTR)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. */
+\f
+/* Delete breakpoint in BS if they are `delete' breakpoints.
+ This is called after any breakpoint is hit, or after errors. */
void
-breakpoint_auto_delete (bnum)
- int bnum;
+breakpoint_auto_delete (bs)
+ bpstat bs;
{
- 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 ();
+ for (; bs; bs = bs->next)
+ if (bs->breakpoint_at && bs->breakpoint_at->disposition == delete
+ && bs->stop)
+ delete_breakpoint (bs->breakpoint_at);
}
-static void
+/* 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)
- write_memory (bpt->address, bpt->shadow_contents, sizeof break_insn);
+ target_remove_breakpoint(bpt->address, bpt->shadow_contents);
if (breakpoint_chain == bpt)
breakpoint_chain = bpt->next;
}
check_duplicates (bpt->address);
+ /* If this breakpoint was inserted, and there is another breakpoint
+ at the same address, we need to insert the other breakpoint. */
+ if (bpt->inserted)
+ {
+ ALL_BREAKPOINTS (b)
+ if (b->address == bpt->address
+ && !b->duplicate
+ && b->enable != disabled)
+ {
+ int val;
+ val = target_insert_breakpoint (b->address, b->shadow_contents);
+ if (val != 0)
+ {
+ fprintf (stderr, "Cannot insert breakpoint %d:\n", b->number);
+ memory_error (val, b->address); /* which bombs us out */
+ }
+ else
+ b->inserted = 1;
+ }
+ }
free_command_lines (&bpt->commands);
if (bpt->cond)
free (bpt->cond);
- free (bpt);
+ if (bpt->cond_string != NULL)
+ free (bpt->cond_string);
+ if (bpt->addr_string != NULL)
+ free (bpt->addr_string);
+ if (bpt->exp_string != NULL)
+ free (bpt->exp_string);
+ if (bpt->source_file != NULL)
+ free (bpt->source_file);
+
+ 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);
}
-void map_breakpoint_numbers ();
-
static void
delete_command (arg, from_tty)
char *arg;
int from_tty;
{
- register struct breakpoint *b, *b1;
if (arg == 0)
{
- if (!from_tty || query ("Delete all breakpoints? "))
+ /* 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)
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. */
+/* 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, (char ***)NULL);
+ for (i = 0; i < sals.nelts; i++)
+ {
+ resolve_sal_pc (&sals.sals[i]);
+
+ /* Reparse conditions, they might contain references to the
+ old symtab. */
+ if (b->cond_string != NULL)
+ {
+ s = b->cond_string;
+ if (b->cond)
+ free ((PTR)b->cond);
+ b->cond = parse_exp_1 (&s, block_for_pc (sals.sals[i].pc), 0);
+ }
+
+ /* We need to re-set the breakpoint if the address changes...*/
+ if (b->address != sals.sals[i].pc
+ /* ...or new and old breakpoints both have source files, and
+ the source file name or the line number changes... */
+ || (b->source_file != NULL
+ && sals.sals[i].symtab != NULL
+ && (!STREQ (b->source_file, sals.sals[i].symtab->filename)
+ || b->line_number != sals.sals[i].line)
+ )
+ /* ...or we switch between having a source file and not having
+ one. */
+ || ((b->source_file == NULL) != (sals.sals[i].symtab == NULL))
+ )
+ {
+ if (b->source_file != NULL)
+ free (b->source_file);
+ if (sals.sals[i].symtab == NULL)
+ b->source_file = NULL;
+ else
+ b->source_file =
+ savestring (sals.sals[i].symtab->filename,
+ strlen (sals.sals[i].symtab->filename));
+ b->line_number = sals.sals[i].line;
+ b->address = sals.sals[i].pc;
+
+ check_duplicates (b->address);
+
+ mention (b);
+ }
+ b->enable = save_enable; /* Restore it, this worked. */
+ }
+ free ((PTR)sals.sals);
+ break;
+
+ case bp_watchpoint:
+ innermost_block = NULL;
+ /* The issue arises of what context to evaluate this in. The same
+ one as when it was set, but what does that mean when symbols have
+ been re-read? We could save the filename and functionname, but
+ if the context is more local than that, the best we could do would
+ be something like how many levels deep and which index at that
+ particular level, but that's going to be less stable than filenames
+ or functionnames. */
+ /* So for now, just use a global context. */
+ b->exp = parse_expression (b->exp_string);
+ b->exp_valid_block = innermost_block;
+ b->val = evaluate_expression (b->exp);
+ release_value (b->val);
+ if (VALUE_LAZY (b->val))
+ value_fetch_lazy (b->val);
+
+ if (b->cond_string != NULL)
+ {
+ s = b->cond_string;
+ b->cond = parse_exp_1 (&s, (struct block *)0, 0);
+ }
+ if (b->enable == enabled)
+ mention (b);
+ break;
+
+ default:
+ printf_filtered ("Deleting unknown breakpoint type %d\n", b->type);
+ /* fall through */
+ case bp_until:
+ case bp_finish:
+ case bp_longjmp:
+ case bp_longjmp_resume:
+ case bp_call_dummy:
+ delete_breakpoint (b);
+ break;
+ }
+
+ return 0;
+}
+/* Re-set all breakpoints after symbols have been re-loaded. */
void
-clear_breakpoints ()
+breakpoint_re_set ()
{
- delete_command (0, 0);
+ 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 */
+ catch_errors (breakpoint_re_set_one, (char *) b, message,
+ RETURN_MASK_ALL);
+ }
+
+ 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
}
\f
/* Set ignore-count of breakpoint number BPTNUM to COUNT.
if (!from_tty)
return;
else if (count == 0)
- printf ("Will stop next time breakpoint %d is reached.", bptnum);
+ printf_filtered ("Will stop next time breakpoint %d is reached.",
+ bptnum);
else if (count == 1)
- printf ("Will ignore next crossing of breakpoint %d.", bptnum);
+ printf_filtered ("Will ignore next crossing of breakpoint %d.",
+ bptnum);
else
- printf ("Will ignore next %d crossings of breakpoint %d.",
+ printf_filtered ("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
char *args;
int from_tty;
{
- register char *p = args;
+ 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);
+ num = get_number (&p);
if (*p == 0)
error ("Second argument (specified ignore-count) is missing.");
- set_ignore_count (num, parse_and_eval_address (p), from_tty);
- printf ("\n");
+ set_ignore_count (num,
+ longest_to_int (value_as_long (parse_and_eval (p))),
+ from_tty);
+ printf_filtered ("\n");
}
\f
/* Call FUNCTION on each of the breakpoints
static void
map_breakpoint_numbers (args, function)
char *args;
- void (*function) ();
+ void (*function) PARAMS ((struct breakpoint *));
{
register char *p = args;
- register char *p1;
+ char *p1;
register int num;
register struct breakpoint *b;
while (*p)
{
p1 = p;
- while (*p1 >= '0' && *p1 <= '9') p1++;
- if (*p1 && *p1 != ' ' && *p1 != '\t')
- error ("Arguments must be breakpoint numbers.");
-
- num = atoi (p);
+
+ num = get_number (&p1);
ALL_BREAKPOINTS (b)
if (b->number == num)
printf ("No breakpoint number %d.\n", num);
win:
p = p1;
- while (*p == ' ' || *p == '\t') p++;
}
}
enable_breakpoint (bpt)
struct breakpoint *bpt;
{
+ FRAME save_selected_frame = NULL;
+ int save_selected_frame_level = -1;
+
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)
+ {
+ FRAME fr = within_scope (bpt->exp_valid_block);
+ if (fr == NULL)
+ {
+ printf_filtered ("\
+Cannot enable watchpoint %d because the block in which its expression\n\
+is valid is not currently in scope.\n", bpt->number);
+ bpt->enable = disabled;
+ return;
+ }
+ save_selected_frame = selected_frame;
+ save_selected_frame_level = selected_frame_level;
+ select_frame (fr, -1);
+ }
+
+ value_free (bpt->val);
+
+ bpt->val = evaluate_expression (bpt->exp);
+ release_value (bpt->val);
+ if (VALUE_LAZY (bpt->val))
+ value_fetch_lazy (bpt->val);
+
+ if (save_selected_frame_level >= 0)
+ select_frame (save_selected_frame, save_selected_frame_level);
+ }
}
+/* ARGSUSED */
static void
-enable_command (args)
+enable_command (args, from_tty)
char *args;
+ int from_tty;
{
- map_breakpoint_numbers (args, enable_breakpoint);
+ struct breakpoint *bpt;
+ if (args == 0)
+ ALL_BREAKPOINTS (bpt)
+ switch (bpt->type)
+ {
+ case bp_breakpoint:
+ case bp_watchpoint:
+ enable_breakpoint (bpt);
+ default:
+ continue;
+ }
+ else
+ map_breakpoint_numbers (args, enable_breakpoint);
}
static void
{
bpt->enable = disabled;
+ if (xgdb_verbose && bpt->type == bp_breakpoint)
+ printf_filtered ("breakpoint #%d disabled\n", bpt->number);
+
check_duplicates (bpt->address);
}
+/* ARGSUSED */
static void
-disable_command (args)
+disable_command (args, from_tty)
char *args;
+ int from_tty;
{
register struct breakpoint *bpt;
if (args == 0)
ALL_BREAKPOINTS (bpt)
- disable_breakpoint (bpt);
+ switch (bpt->type)
+ {
+ case bp_breakpoint:
+ case bp_watchpoint:
+ disable_breakpoint (bpt);
+ default:
+ continue;
+ }
else
map_breakpoint_numbers (args, disable_breakpoint);
}
enable_once_breakpoint (bpt)
struct breakpoint *bpt;
{
- bpt->enable = temporary;
+ bpt->enable = enabled;
+ bpt->disposition = disable;
check_duplicates (bpt->address);
}
+/* ARGSUSED */
static void
-enable_once_command (args)
+enable_once_command (args, from_tty)
char *args;
+ int from_tty;
{
map_breakpoint_numbers (args, enable_once_breakpoint);
}
enable_delete_breakpoint (bpt)
struct breakpoint *bpt;
{
- bpt->enable = delete;
+ bpt->enable = enabled;
+ bpt->disposition = delete;
check_duplicates (bpt->address);
}
+/* ARGSUSED */
static void
-enable_delete_command (args)
+enable_delete_command (args, from_tty)
char *args;
+ int from_tty;
{
map_breakpoint_numbers (args, enable_delete_breakpoint);
}
\f
-
-/* Chain containing all defined enable commands. */
-
-struct cmd_list_element *enablelist;
-
-extern struct cmd_list_element *cmdlist;
-
-static
-initialize ()
+/*
+ * 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,
+ (char ***)NULL);
+ else
+ sals = decode_line_1 (&string, funfirstline,
+ (struct symtab *)NULL, 0, (char ***)NULL);
+ if (*string)
+ error ("Junk at end of line specification: %s", string);
+ return sals;
+}
+\f
+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;
- enablelist = 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\
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.");
+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\
by using \"enable once\" on the breakpoint number.");
add_prefix_cmd ("enable", class_breakpoint, enable_command,
- "Enable some breakpoints. Give breakpoint numbers as arguments.\n\
+ "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_cmd ("delete", 0, enable_delete_command,
+ 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", 0, enable_once_command,
+ 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_com ("disable", class_breakpoint, disable_command,
- "Disable some breakpoints. Give breakpoint numbers as arguments.\n\
-With no arguments, disable all breakpoints.\n\
-A disabled breakpoint is not forgotten,\n\
-but it has no effect until enabled again.");
+ 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_com ("delete", class_breakpoint, delete_command,
- "Delete breakpoints, specifying breakpoint numbers; or all breakpoints.\n\
+ 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.");
+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\
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 - normal breakpoint\n\
+\twatchpoint - watchpoint\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 \"$bpnum\" contains the number of the last\n\
+breakpoint set.");
+
+#if MAINTENANCE_CMDS
+
+ add_cmd ("breakpoints", class_maintenance, maintenance_info_breakpoints,
"Status of all breakpoints, or breakpoint number NUMBER.\n\
-Second column is \"y\" for enabled breakpoint, \"n\" for disabled,\n\
-\"o\" for enabled once (disable when hit), \"d\" for enable but delete when hit.\n\
-Then come the address and the file/line number.\n\n\
+The \"Type\" column indicates one of:\n\
+\tbreakpoint - normal breakpoint\n\
+\twatchpoint - watchpoint\n\
+\tlongjmp - internal breakpoint used to step through longjmp()\n\
+\tlongjmp resume - internal breakpoint at the target of longjmp()\n\
+\tuntil - internal breakpoint used by the \"until\" command\n\
+\tfinish - internal breakpoint used by the \"finish\" command\n\
+The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
+the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
+breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
+address and file/line number respectively.\n\n\
Convenience variable \"$_\" and default examine address for \"x\"\n\
-are set to the address of the last breakpoint listed.");
+are set to the address of the last breakpoint listed.\n\n\
+Convenience variable \"$bpnum\" contains the number of the last\n\
+breakpoint set.",
+ &maintenanceinfolist);
+
+#endif /* MAINTENANCE_CMDS */
+
+ 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''.");
}
-END_FILE
+/* OK, when we call objfile_relocate, we need to relocate breakpoints
+ too. breakpoint_re_set is not a good choice--for example, if
+ addr_string contains just a line number without a file name the
+ breakpoint might get set in a different file. In general, there is
+ no need to go all the way back to the user's string (though this might
+ work if some effort were made to canonicalize it), since symtabs and
+ everything except addresses are still valid.
+
+ Probably the best way to solve this is to have each breakpoint save
+ the objfile and the section number that was used to set it (if set
+ by "*addr", probably it is best to use find_pc_line to get a symtab
+ and use the objfile and block_line_section for that symtab). Then
+ objfile_relocate can call fixup_breakpoints with the objfile and
+ the new_offsets, and it can relocate only the appropriate breakpoints. */
+
+#ifdef IBM6000_TARGET
+/* But for now, just kludge it based on the concept that before an
+ objfile is relocated the breakpoint is below 0x10000000, and afterwards
+ it is higher, so that way we only relocate each breakpoint once. */
+
+void
+fixup_breakpoints (low, high, delta)
+ CORE_ADDR low;
+ CORE_ADDR high;
+ CORE_ADDR delta;
+{
+ struct breakpoint *b;
+
+ ALL_BREAKPOINTS (b)
+ {
+ if (b->address >= low && b->address <= high)
+ b->address += delta;
+ }
+}
+#endif
projects / deliverable / binutils-gdb.git / blobdiff