/* Everything about breakpoints, for GDB.
- Copyright (C) 1986, 1987, 1989, 1990 Free Software Foundation, Inc.
+ Copyright 1986, 1987, 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
This file is part of GDB.
-GDB is free software; you can redistribute it and/or modify
+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 1, or (at your option)
-any later version.
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
-GDB is distributed in the hope that it will be useful,
+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 GDB; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-#include <stdio.h>
-#include <ctype.h>
#include "defs.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 "command.h"
#include "inferior.h"
#include "target.h"
+#include "language.h"
#include <string.h>
+#include "demangle.h"
+
+/* local function prototypes */
+
+static void
+catch_command_1 PARAMS ((char *, int, int));
+
+static void
+enable_delete_command PARAMS ((char *, int));
+
+static void
+enable_delete_breakpoint PARAMS ((struct breakpoint *));
+
+static void
+enable_once_command PARAMS ((char *, int));
+
+static void
+enable_once_breakpoint PARAMS ((struct breakpoint *));
+
+static void
+disable_command PARAMS ((char *, int));
+
+static void
+disable_breakpoint PARAMS ((struct breakpoint *));
+
+static void
+enable_command PARAMS ((char *, int));
+
+static void
+enable_breakpoint PARAMS ((struct breakpoint *));
+
+static void
+map_breakpoint_numbers PARAMS ((char *, void (*)(struct breakpoint *)));
+
+static void
+ignore_command PARAMS ((char *, int));
+
+static int
+breakpoint_re_set_one PARAMS ((char *));
+
+static void
+delete_command PARAMS ((char *, int));
+
+static void
+clear_command PARAMS ((char *, int));
+
+static void
+catch_command PARAMS ((char *, int));
+
+static struct symtabs_and_lines
+get_catch_sals PARAMS ((int));
+
+static void
+watch_command PARAMS ((char *, int));
+
+static void
+tbreak_command PARAMS ((char *, int));
+
+static void
+break_command_1 PARAMS ((char *, int, int));
+
+static void
+mention PARAMS ((struct breakpoint *));
+
+static struct breakpoint *
+set_raw_breakpoint PARAMS ((struct symtab_and_line));
+
+static void
+check_duplicates PARAMS ((CORE_ADDR));
+
+static void
+describe_other_breakpoints PARAMS ((CORE_ADDR));
+
+static void
+breakpoints_info PARAMS ((char *, int));
+
+static void
+breakpoint_1 PARAMS ((int, int));
+
+static bpstat
+bpstat_alloc PARAMS ((struct breakpoint *, bpstat));
+
+static int
+breakpoint_cond_eval PARAMS ((char *));
+
+static void
+cleanup_executing_breakpoints PARAMS ((int));
+
+static void
+commands_command PARAMS ((char *, int));
+
+static void
+condition_command PARAMS ((char *, int));
+
+static int
+get_number PARAMS ((char **));
+
+static void
+set_breakpoint_count PARAMS ((int));
+
extern int addressprint; /* Print machine addresses? */
extern int demangle; /* Print de-mangled symbol names? */
-extern int catch_errors ();
-extern void set_next_address (); /* ...for x/ command */
-
/* Are we executing breakpoint commands? */
static int executing_breakpoint_commands;
-/* States of enablement of breakpoint.
- `temporary' means disable when hit.
- `delete' means delete when hit. */
-
-enum enable { disabled, enabled, temporary, delete};
-
-/* Not that the ->silent field is not currently used by any commands
- (though the code is in there if it was to be and set_raw_breakpoint
- does set it to 0). I implemented it because I thought it would be
- useful for a hack I had to put in; I'm going to leave it in because
- I can see how there might be times when it would indeed be useful */
-
-/* This is for a breakpoint or a watchpoint. */
-
-struct breakpoint
-{
- struct breakpoint *next;
- /* Number assigned to distinguish breakpoints. */
- int number;
- /* Address to break at, or NULL if not a breakpoint. */
- CORE_ADDR address;
- /* Line number of this address. Redundant. Only matters if address
- is non-NULL. */
- int line_number;
- /* Symtab of file of this address. Redundant. Only matters if address
- is non-NULL. */
- struct symtab *symtab;
- /* Zero means disabled; remember the info but don't break here. */
- enum enable enable;
- /* Non-zero means a silent breakpoint (don't print frame info
- if we stop here). */
- unsigned char silent;
- /* Number of stops at this breakpoint that should
- be continued automatically before really stopping. */
- int ignore_count;
- /* "Real" contents of byte where breakpoint has been inserted.
- Valid only when breakpoints are in the program. Under the complete
- control of the target insert_breakpoint and remove_breakpoint routines.
- No other code should assume anything about the value(s) here. */
- char shadow_contents[BREAKPOINT_MAX];
- /* Nonzero if this breakpoint is now inserted. Only matters if address
- is non-NULL. */
- char inserted;
- /* Nonzero if this is not the first breakpoint in the list
- for the given address. Only matters if address is non-NULL. */
- char duplicate;
- /* Chain of command lines to execute when this breakpoint is hit. */
- struct command_line *commands;
- /* Stack depth (address of frame). If nonzero, break only if fp
- equals this. */
- FRAME_ADDR frame;
- /* Conditional. Break only if this expression's value is nonzero. */
- struct expression *cond;
-
- /* String we used to set the breakpoint (malloc'd). Only matters if
- address is non-NULL. */
- char *addr_string;
- /* String form of the breakpoint condition (malloc'd), or NULL if there
- is no condition. */
- char *cond_string;
-
- /* The expression we are watching, or NULL if not a watchpoint. */
- struct expression *exp;
- /* The largest block within which it is valid, or NULL if it is
- valid anywhere (e.g. consists just of global symbols). */
- struct block *exp_valid_block;
- /* Value of the watchpoint the last time we checked it. */
- value val;
-};
+/* 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;
{
breakpoint_count = num;
set_internalvar (lookup_internalvar ("bpnum"),
- value_from_long (builtin_type_int, (LONGEST) num));
+ value_from_longest (builtin_type_int, (LONGEST) num));
}
/* Default address, symtab and line to put a breakpoint at
struct symtab *default_breakpoint_symtab;
int default_breakpoint_line;
-static void delete_breakpoint ();
-void breakpoint_auto_delete ();
-
/* Flag indicating extra verbosity for xgdb. */
extern int xgdb_verbose;
\f
}
else
{
+ if (*p == '-')
+ ++p;
while (*p >= '0' && *p <= '9')
++p;
if (p == *pp)
{
if (b->cond)
{
- free (b->cond);
+ free ((PTR)b->cond);
b->cond = 0;
}
if (b->cond_string != NULL)
- free (b->cond_string);
+ 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
{
/* 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_c_1 (&arg, block_for_pc (b->address), 0);
+ 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, from_tty)
char *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 */
+
+/* Like target_read_memory() but if breakpoints are inserted, return
+ the shadow contents instead of the breakpoints themselves.
+
+ Read "memory data" from whatever target or inferior we have.
+ Returns zero if successful, errno value if not. EIO is used
+ for address out of bounds. If breakpoints are inserted, returns
+ shadow contents, not the breakpoints themselves. From breakpoint.c. */
+
+int
+read_memory_nobpt (memaddr, myaddr, len)
+ CORE_ADDR memaddr;
+ char *myaddr;
+ unsigned len;
+{
+ int status;
+ struct breakpoint *b;
+
+ if (memory_breakpoint_size < 0)
+ /* No breakpoints on this machine. */
+ return target_read_memory (memaddr, myaddr, len);
+
+ ALL_BREAKPOINTS (b)
+ {
+ if (b->type == bp_watchpoint || !b->inserted)
+ continue;
+ else if (b->address + memory_breakpoint_size <= memaddr)
+ /* The breakpoint is entirely before the chunk of memory
+ we are reading. */
+ continue;
+ else if (b->address >= memaddr + len)
+ /* The breakpoint is entirely after the chunk of memory we
+ are reading. */
+ continue;
+ else
+ {
+ /* Copy the breakpoint from the shadow contents, and recurse
+ for the things before and after. */
+
+ /* Addresses and length of the part of the breakpoint that
+ we need to copy. */
+ CORE_ADDR membpt = b->address;
+ unsigned int bptlen = memory_breakpoint_size;
+ /* Offset within shadow_contents. */
+ int bptoffset = 0;
+
+ if (membpt < memaddr)
+ {
+ /* Only copy the second part of the breakpoint. */
+ bptlen -= memaddr - membpt;
+ bptoffset = memaddr - membpt;
+ membpt = memaddr;
+ }
+
+ if (membpt + bptlen > memaddr + len)
+ {
+ /* Only copy the first part of the breakpoint. */
+ bptlen -= (membpt + bptlen) - (memaddr + len);
+ }
+
+ memcpy (myaddr + membpt - memaddr,
+ b->shadow_contents + bptoffset, bptlen);
+
+ if (membpt > memaddr)
+ {
+ /* Copy the section of memory before the breakpoint. */
+ status = read_memory_nobpt (memaddr, myaddr, membpt - memaddr);
+ if (status != 0)
+ return status;
+ }
+
+ if (membpt + bptlen < memaddr + len)
+ {
+ /* Copy the section of memory after the breakpoint. */
+ status = read_memory_nobpt
+ (membpt + bptlen,
+ myaddr + membpt + bptlen - memaddr,
+ memaddr + len - (membpt + bptlen));
+ if (status != 0)
+ return status;
+ }
+ return 0;
+ }
+ }
+ /* Nothing overlaps. Just call read_memory_noerr. */
+ return target_read_memory (memaddr, myaddr, len);
+}
+\f
/* insert_breakpoints is used when starting or continuing the program.
remove_breakpoints is used when the program stops.
Both return zero if successful,
int disabled_breaks = 0;
ALL_BREAKPOINTS (b)
- if (b->address != NULL
+ if (b->type != bp_watchpoint
&& b->enable != disabled
&& ! b->inserted
&& ! b->duplicate)
#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 */
}
}
#endif /* BREAKPOINT_DEBUG */
ALL_BREAKPOINTS (b)
- if (b->address != NULL && b->inserted)
+ if (b->type != bp_watchpoint && b->inserted)
{
val = target_remove_breakpoint(b->address, b->shadow_contents);
if (val)
return val;
b->inserted = 0;
#ifdef BREAKPOINT_DEBUG
- printf ("Removed breakpoint at 0x%x, shadow 0x%x, 0x%x.\n",
- b->address, b->shadow_contents[0], b->shadow_contents[1]);
+ printf ("Removed breakpoint at %s",
+ local_hex_string(b->address));
+ printf (", shadow %s",
+ local_hex_string(b->shadow_contents[0]));
+ printf (", %s.\n",
+ local_hex_string(b->shadow_contents[1]));
#endif /* BREAKPOINT_DEBUG */
}
\f
/* bpstat stuff. External routines' interfaces are documented
in breakpoint.h. */
+
+/* Clear a bpstat so that it says we are not at any breakpoint.
+ Also free any storage that is part of a bpstat. */
+
void
bpstat_clear (bsp)
bpstat *bsp;
q = p->next;
if (p->old_val != NULL)
value_free (p->old_val);
- free (p);
+ free ((PTR)p);
p = q;
}
*bsp = NULL;
}
+/* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
+ is part of the bpstat is copied as well. */
+
bpstat
bpstat_copy (bs)
bpstat bs;
for (; bs != NULL; bs = bs->next)
{
tmp = (bpstat) xmalloc (sizeof (*tmp));
- bcopy (bs, tmp, sizeof (*tmp));
+ memcpy (tmp, bs, sizeof (*tmp));
if (p == NULL)
/* This is the first thing in the chain. */
retval = tmp;
return retval;
}
+/* Find the bpstat associated with this breakpoint */
+
+bpstat
+bpstat_find_breakpoint(bsp, breakpoint)
+ bpstat bsp;
+ struct breakpoint *breakpoint;
+{
+ if (bsp == NULL) return NULL;
+
+ for (;bsp != NULL; bsp = bsp->next) {
+ if (bsp->breakpoint_at == breakpoint) return bsp;
+ }
+ return NULL;
+}
+
+/* Return the breakpoint number of the first breakpoint we are stopped
+ at. *BSP upon return is a bpstat which points to the remaining
+ breakpoints stopped at (but which is not guaranteed to be good for
+ anything but further calls to bpstat_num).
+ Return 0 if passed a bpstat which does not indicate any breakpoints. */
+
int
bpstat_num (bsp)
bpstat *bsp;
}
}
+/* Modify BS so that the actions will not be performed. */
+
void
bpstat_clear_actions (bs)
bpstat bs;
}
}
+/* Stub for cleaning up our state if we error-out of a breakpoint command */
+/* ARGSUSED */
+static void
+cleanup_executing_breakpoints (ignore)
+ int ignore;
+{
+ executing_breakpoint_commands = 0;
+}
+
/* Execute all the commands associated with all the breakpoints at this
location. Any of these commands could cause the process to proceed
beyond this point, etc. We look out for such changes by checking
the global "breakpoint_proceeded" after each command. */
+
void
bpstat_do_actions (bsp)
bpstat *bsp;
{
bpstat bs;
+ struct cleanup *old_chain;
+
+ executing_breakpoint_commands = 1;
+ old_chain = make_cleanup (cleanup_executing_breakpoints, 0);
top:
bs = *bsp;
- executing_breakpoint_commands = 1;
breakpoint_proceeded = 0;
for (; bs != NULL; bs = bs->next)
{
goto top;
}
}
- clear_momentary_breakpoints ();
executing_breakpoint_commands = 0;
+ discard_cleanups (old_chain);
}
-int
-bpstat_print (bs)
+/* 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 == NULL || bs->breakpoint_at == NULL)
- return 0;
-
- /* If bpstat_stop_status says don't print, OK, we won't. An example
- circumstance is when we single-stepped for both a watchpoint and
- for a "stepi" instruction. The bpstat says that the watchpoint
- explains the stop, but we shouldn't print because the watchpoint's
- value didn't change -- and the real reason we are stopping here
- rather than continuing to step (as the watchpoint would've had us do)
- is because of the "stepi". */
- if (!bs->print)
+ if (bs->breakpoint_at == NULL
+ || (bs->breakpoint_at->type != bp_breakpoint
+ && bs->breakpoint_at->type != bp_watchpoint))
return 0;
- if (bs->breakpoint_at->address != NULL)
+ 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 ("\n");
value_free (bs->old_val);
bs->old_val = NULL;
- return 1;
+ return 0;
}
+ /* We can't deal with it. Maybe another member of the bpstat chain can. */
+ return -1;
+}
- fprintf_filtered (stderr, "gdb internal error: in bpstat_print\n");
+/* 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 int to
+ 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)
- int exp;
+ char *exp;
{
- return value_zerop (evaluate_expression ((struct expression *)exp));
+ return !value_true (evaluate_expression ((struct expression *)exp));
}
/* Allocate a new bpstat and chain it to the current one. */
bs->breakpoint_at = b;
/* If the condition is false, etc., don't do the commands. */
bs->commands = NULL;
- bs->momentary = b->number == -3;
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_register (FP_REGNUM) 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_register (FP_REGNUM) == 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);
+ 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)
+ PTR 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. */
+ /* But couldn't we just call free_all_values instead? */
+
+ 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;
+}
/* 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:
Each element of the chain refers to a particular breakpoint or
watchpoint at which we have stopped. (We may have stopped for
- several reasons.)
+ several reasons concurrently.)
Each element of the chain has valid next, breakpoint_at,
commands, FIXME??? fields.
FRAME_ADDR frame_address;
{
register struct breakpoint *b;
- int stop = 0;
- int print = 0;
CORE_ADDR bp_addr;
+#if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS)
/* True if we've hit a breakpoint (as opposed to a watchpoint). */
int real_breakpoint = 0;
+#endif
/* Root of the chain of bpstat's */
- struct bpstat__struct root_bs[1];
+ struct bpstat root_bs[1];
/* Pointer to the last thing in the chain currently. */
bpstat bs = root_bs;
ALL_BREAKPOINTS (b)
{
- int this_bp_stop;
- int this_bp_print;
-
if (b->enable == disabled)
continue;
- if (b->address != NULL && b->address != bp_addr)
+
+ if (b->type != bp_watchpoint && b->address != bp_addr)
continue;
+ /* Come here if it's a watchpoint, or if the break address matches */
+
bs = bpstat_alloc (b, bs); /* Alloc a bpstat to explain stop */
- this_bp_stop = 1;
- this_bp_print = 1;
+ bs->stop = 1;
+ bs->print = 1;
- if (b->exp != NULL) /* Watchpoint */
+ if (b->type == bp_watchpoint)
{
- int within_current_scope;
- if (b->exp_valid_block != NULL)
- within_current_scope =
- contained_in (get_selected_block (), b->exp_valid_block);
- else
- within_current_scope = 1;
-
- if (within_current_scope)
- {
- value new_val = evaluate_expression (b->exp);
- release_value (new_val);
- if (!value_equal (b->val, new_val))
- {
- bs->old_val = b->val;
- b->val = new_val;
- /* We will stop here */
- }
- else
- {
- /* Nothing changed, don't do anything. */
- value_free (new_val);
- continue;
- /* We won't stop here */
- }
- }
- else
+ 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))
{
- /* This seems like the only logical thing to do because
- if we temporarily ignored the watchpoint, then when
- we reenter the block in which it is valid it contains
- garbage (in the case of a function, it may have two
- garbage values, one before and one after the prologue).
- So we can't even detect the first assignment to it and
- watch after that (since the garbage may or may not equal
- the first value assigned). */
- b->enable = disabled;
- printf_filtered ("\
-Watchpoint %d disabled because the program has left the block in\n\
-which its expression is valid.\n", b->number);
- /* We won't stop here */
- /* FIXME, maybe we should stop here!!! */
+ 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)
- this_bp_stop = 0;
+ bs->stop = 0;
else
{
- int value_zero;
+ int value_is_zero;
if (b->cond)
{
/* Need to select the frame, with all that implies
so that the conditions will have the right context. */
select_frame (get_current_frame (), 0);
- value_zero
- = catch_errors (breakpoint_cond_eval, (int)(b->cond),
- "Error occurred in testing breakpoint condition.");
+ value_is_zero
+ = catch_errors (breakpoint_cond_eval, (char *)(b->cond),
+ "Error in testing breakpoint condition:\n");
+ /* FIXME-someday, should give breakpoint # */
free_all_values ();
}
- if (b->cond && value_zero)
+ if (b->cond && value_is_zero)
{
- this_bp_stop = 0;
+ bs->stop = 0;
}
else if (b->ignore_count > 0)
{
b->ignore_count--;
- this_bp_stop = 0;
+ bs->stop = 0;
}
else
{
/* We will stop here */
- if (b->enable == temporary)
+ if (b->disposition == disable)
b->enable = disabled;
bs->commands = b->commands;
if (b->silent)
- this_bp_print = 0;
- if (bs->commands && !strcmp ("silent", bs->commands->line))
+ bs->print = 0;
+ if (bs->commands && STREQ ("silent", bs->commands->line))
{
bs->commands = bs->commands->next;
- this_bp_print = 0;
+ bs->print = 0;
}
}
}
- if (this_bp_stop)
- stop = 1;
- if (this_bp_print)
- print = 1;
+ /* 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)
{
- bs->stop = stop;
- bs->print = print;
-#if DECR_PC_AFTER_BREAK != 0 || defined (SHIFT_INST_REGS)
if (real_breakpoint)
{
*pc = bp_addr;
write_pc (bp_addr);
#endif /* No SHIFT_INST_REGS. */
}
-#endif /* DECR_PC_AFTER_BREAK != 0. */
}
+#endif /* DECR_PC_AFTER_BREAK != 0. */
return bs;
}
+\f
+/* Tell what to do about this bpstat. */
+enum bpstat_what
+bpstat_what (bs)
+ bpstat bs;
+{
+ /* Classify each bpstat as one of the following. */
+ enum class {
+ /* There was a watchpoint, but we're not stopping. */
+ wp_nostop = 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. */
+ static const enum bpstat_what
+ table[(int)class_last][(int)BPSTAT_WHAT_LAST] =
+ {
+ /* old action */
+ /* keep_c stop_s stop_n single setlr clrlr clrlrs */
+
+/*wp_nostop*/ {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 current_action = BPSTAT_WHAT_KEEP_CHECKING;
+
+ for (; bs != NULL; bs = bs->next)
+ {
+ enum class bs_class;
+ 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
+ bs_class = wp_nostop;
+ break;
+ case bp_longjmp:
+ bs_class = long_jump;
+ break;
+ case bp_longjmp_resume:
+ bs_class = long_resume;
+ break;
+ }
+ current_action = table[(int)bs_class][(int)current_action];
+ }
+ return current_action;
+}
+
+/* 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 != disabled && b->exp != NULL)
+ if (b->enable == enabled && b->type == bp_watchpoint)
return 1;
return 0;
}
is nonzero, process only watchpoints. */
static void
-breakpoint_1 (bnum, watchpoints)
+breakpoint_1 (bnum, allflag)
int bnum;
- int watchpoints;
+ int allflag;
{
register struct breakpoint *b;
register struct command_line *l;
register struct symbol *sym;
CORE_ADDR last_addr = (CORE_ADDR)-1;
- int header_printed = 0;
+ int found_a_breakpoint = 0;
+ static char *bptypes[] = {"breakpoint", "until", "finish", "watchpoint",
+ "longjmp", "longjmp resume"};
+ static char *bpdisps[] = {"del", "dis", "keep"};
+ static char bpenables[] = "ny";
+ char wrap_indent[80];
+
+ if (!breakpoint_chain)
+ {
+ printf_filtered ("No breakpoints or watchpoints.\n");
+ return;
+ }
ALL_BREAKPOINTS (b)
- if (bnum == -1 || bnum == b->number)
+ if (bnum == -1
+ || bnum == b->number)
{
- if (b->address == NULL && !watchpoints)
- {
- if (bnum == -1)
- continue;
- error ("That is a watchpoint, not a breakpoint.");
- }
- if (b->address != NULL && watchpoints)
- {
- if (bnum == -1)
- continue;
- error ("That is a breakpoint, not a watchpoint.");
- }
-
- if (!header_printed)
- {
- if (watchpoints)
- printf_filtered (" Enb Expression\n");
- else if (addressprint)
- printf_filtered (" Enb Address Where\n");
- else
- printf_filtered (" Enb Where\n");
- header_printed = 1;
- }
-
- printf_filtered ("#%-3d %c ", b->number, "nyod"[(int) b->enable]);
- if (b->address == NULL)
- print_expression (b->exp, stdout);
- else
+/* 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:
if (addressprint)
- printf_filtered (" 0x%08x ", b->address);
+ printf_filtered ("%s ", local_hex_string_custom(b->address, "08"));
last_addr = b->address;
if (b->symtab)
sym = find_pc_function (b->address);
if (sym)
{
- fputs_filtered (" in ", stdout);
- fputs_demangled (SYMBOL_NAME (sym), stdout, 1);
+ fputs_filtered ("in ", stdout);
+ fputs_filtered (SYMBOL_SOURCE_NAME (sym), stdout);
+ wrap_here (wrap_indent);
fputs_filtered (" at ", stdout);
}
fputs_filtered (b->symtab->filename, stdout);
printf_filtered (":%d", b->line_number);
}
else
- print_address_symbolic (b->address, stdout, demangle);
+ print_address_symbolic (b->address, stdout, demangle, " ");
}
printf_filtered ("\n");
if (b->frame)
- printf_filtered ("\tstop only in stack frame at 0x%x\n", b->frame);
+ printf_filtered ("\tstop only in stack frame at %s\n",
+ local_hex_string(b->frame));
if (b->cond)
{
printf_filtered ("\tstop only if ");
}
}
- if (!header_printed)
- {
- char *which = watchpoints ? "watch" : "break";
- if (bnum == -1)
- printf_filtered ("No %spoints.\n", which);
- else
- printf_filtered ("No %spoint numbered %d.\n", which, bnum);
- }
-
- /* 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);
+ if (!found_a_breakpoint
+ && bnum != -1)
+ printf_filtered ("No breakpoint or watchpoint number %d.\n", bnum);
+ else
+ /* Compare against (CORE_ADDR)-1 in case some compiler decides
+ that a comparison of an unsigned with -1 is always false. */
+ if (last_addr != (CORE_ADDR)-1)
+ set_next_address (last_addr);
}
+/* ARGSUSED */
static void
breakpoints_info (bnum_exp, from_tty)
char *bnum_exp;
breakpoint_1 (bnum, 0);
}
+#if MAINTENANCE_CMDS
+
+/* ARGSUSED */
static void
-watchpoints_info (bnum_exp, from_tty)
+maintenance_info_breakpoints (bnum_exp, from_tty)
char *bnum_exp;
int from_tty;
{
breakpoint_1 (bnum, 1);
}
+#endif
+
/* Print a message describing any breakpoints set at PC. */
static void
(b->enable == disabled) ? " (disabled)" : "",
(others > 1) ? "," : ((others == 1) ? " and" : ""));
}
- printf ("also set at pc 0x%x.\n", pc);
+ printf ("also set at pc %s.\n", local_hex_string(pc));
}
}
\f
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;
b->line_number = sal.line;
b->silent = 0;
b->ignore_count = 0;
b->commands = NULL;
- b->frame = NULL;
+ b->frame = 0;
/* Add this breakpoint to the end of the chain
so that a list of breakpoints will come out in order
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. */
-void
-set_momentary_breakpoint (sal, frame)
+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->number = -3;
- b->enable = delete;
+ 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->number == -3)
+ 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;
{
- if (b->exp)
+ switch (b->type)
{
+ case bp_watchpoint:
printf_filtered ("Watchpoint %d: ", b->number);
print_expression (b->exp, stdout);
- }
- else
- {
- printf_filtered ("Breakpoint %d at 0x%x", b->number, b->address);
+ break;
+ case bp_breakpoint:
+ printf_filtered ("Breakpoint %d at %s", b->number,
+ local_hex_string(b->address));
if (b->symtab)
printf_filtered (": file %s, line %d.",
b->symtab->filename, b->line_number);
+ break;
+ case bp_until:
+ case bp_finish:
+ case bp_longjmp:
+ case bp_longjmp_resume:
+ break;
}
printf_filtered ("\n");
}
sal.symtab = s;
sal.line = line;
- sal.pc = find_line_pc (sal.symtab, sal.line);
- if (sal.pc == 0)
- error ("No line %d in file \"%s\".\n", sal.line, sal.symtab->filename);
- else
- {
- describe_other_breakpoints (sal.pc);
+ 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->cond = 0;
- b->addr_string = addr_string;
- if (tempflag)
- b->enable = temporary;
+ 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);
- }
+ mention (b);
}
-#endif
+#endif /* 0 */
\f
/* Set a breakpoint according to ARG (function, linenum or *address)
and make it temporary if TEMPFLAG is nonzero. */
char *addr_end;
int i;
- CORE_ADDR pc;
sals.sals = NULL;
sals.nelts = 0;
if (! sals.nelts)
return;
+ /* Resolve all line numbers to PC's, and verify that conditions
+ can be parsed, before setting any breakpoints. */
for (i = 0; i < sals.nelts; i++)
{
- 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;
+ resolve_sal_pc (&sals.sals[i]);
while (arg && *arg)
{
{
arg += 2;
cond_start = arg;
- cond = parse_c_1 (&arg, block_for_pc (pc), 0);
+ cond = parse_exp_1 (&arg, block_for_pc (sals.sals[i].pc), 0);
cond_end = arg;
}
else
error ("Junk at end of arguments.");
}
- sals.sals[i].pc = pc;
}
+ /* Now set all the breakpoints. */
for (i = 0; i < sals.nelts; i++)
{
sal = sals.sals[i];
b = set_raw_breakpoint (sal);
set_breakpoint_count (breakpoint_count + 1);
b->number = breakpoint_count;
+ b->type = bp_breakpoint;
b->cond = cond;
-
+
+ /* FIXME: We should add the filename if this is a static function
+ and probably if it is a line number (the line numbers could
+ have changed when we re-read symbols; possibly better to disable
+ the breakpoint in that case). */
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);
- if (tempflag)
- b->enable = temporary;
+ b->enable = enabled;
+ b->disposition = tempflag ? delete : donttouch;
mention (b);
}
printf ("Multiple breakpoints were set.\n");
printf ("Use the \"delete\" command to delete unwanted breakpoints.\n");
}
- free (sals.sals);
+ free ((PTR)sals.sals);
+}
+
+/* Helper function for break_command_1 and disassemble_command. */
+
+void
+resolve_sal_pc (sal)
+ struct symtab_and_line *sal;
+{
+ CORE_ADDR pc;
+
+ if (sal->pc == 0 && sal->symtab != 0)
+ {
+ pc = find_line_pc (sal->symtab, sal->line);
+ if (pc == 0)
+ error ("No line %d in file \"%s\".",
+ sal->line, sal->symtab->filename);
+ sal->pc = pc;
+ }
}
void
break_command_1 (arg, 1, from_tty);
}
+/* ARGSUSED */
static void
watch_command (arg, from_tty)
char *arg;
{
struct breakpoint *b;
struct symtab_and_line sal;
+ struct expression *exp;
+ struct block *exp_valid_block;
+ struct value *val;
- sal.pc = NULL;
+ 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;
- innermost_block = NULL;
- b->exp = parse_c_expression (arg);
- b->exp_valid_block = innermost_block;
- b->val = evaluate_expression (b->exp);
- release_value (b->val);
+ 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;
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 ();
error ("Couldn't get information on specified line.");
sal = sals.sals[0];
- free (sals.sals); /* malloc'd, so freed */
+ free ((PTR)sals.sals); /* malloc'd, so freed */
if (*arg)
error ("Junk at end of arguments.");
- if (sal.pc == 0 && sal.symtab != 0)
- sal.pc = find_line_pc (sal.symtab, sal.line);
-
- if (sal.pc == 0)
- error ("No line %d in file \"%s\".", sal.line, sal.symtab->filename);
+ resolve_sal_pc (&sal);
- set_momentary_breakpoint (sal, selected_frame);
+ breakpoint = set_momentary_breakpoint (sal, selected_frame, bp_until);
+ old_chain = make_cleanup(delete_breakpoint, breakpoint);
+
/* Keep within the current frame */
if (prev_frame)
fi = get_frame_info (prev_frame);
sal = find_pc_line (fi->pc, 0);
sal.pc = fi->pc;
- set_momentary_breakpoint (sal, prev_frame);
+ 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)
enable_catch_breakpoint ()
{
}
+#endif /* 0 */
struct sal_chain
{
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
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");
}
#endif
printf ("No catch clause for exception %s.\n", p);
+#if 0
win:
+#endif
p = p1;
while (*p == ' ' || *p == '\t') p++;
}
}
+#endif /* 0 */
/* This shares a lot of code with `print_frame_label_vars' from stack.c. */
get_catch_sals (this_level_only)
int this_level_only;
{
- extern struct blockvector *blockvector_for_pc ();
register struct blockvector *bl;
- register struct block *block = get_frame_block (selected_frame);
+ register struct block *block;
int index, have_default = 0;
- struct frame_info *fi = get_frame_info (selected_frame);
- CORE_ADDR pc = fi->pc;
+ struct frame_info *fi;
+ CORE_ADDR pc;
struct symtabs_and_lines sals;
struct sal_chain *sal_chain = 0;
char *blocks_searched;
+ /* Not sure whether an error message is always the correct response,
+ but it's better than a core dump. */
+ if (selected_frame == NULL)
+ error ("No selected frame.");
+ block = get_frame_block (selected_frame);
+ fi = get_frame_info (selected_frame);
+ pc = fi->pc;
+
sals.nelts = 0;
sals.sals = NULL;
bl = blockvector_for_pc (BLOCK_END (block) - 4, &index);
blocks_searched = (char *) alloca (BLOCKVECTOR_NBLOCKS (bl) * sizeof (char));
- bzero (blocks_searched, BLOCKVECTOR_NBLOCKS (bl) * sizeof (char));
+ memset (blocks_searched, 0, BLOCKVECTOR_NBLOCKS (bl) * sizeof (char));
while (block != 0)
{
for (i = 0; i < nsyms; i++)
{
sym = BLOCK_SYM (b, i);
- if (! strcmp (SYMBOL_NAME (sym), "default"))
+ if (STREQ (SYMBOL_NAME (sym), "default"))
{
if (have_default)
continue;
/* Commands to deal with catching exceptions. */
-void
+static void
catch_command_1 (arg, tempflag, from_tty)
char *arg;
int tempflag;
register struct breakpoint *b;
char *save_arg;
int i;
- CORE_ADDR pc;
sal.line = sal.pc = sal.end = 0;
sal.symtab = 0;
{
/* Grab selected catch clauses. */
error ("catch NAME not implemeneted");
+#if 0
+ /* This isn't used; I don't know what it was for. */
sals = map_catch_names (arg, catch_breakpoint);
+#endif
}
if (! sals.nelts)
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;
+ resolve_sal_pc (&sals.sals[i]);
while (arg && *arg)
{
if (arg[0] == 'i' && arg[1] == 'f'
&& (arg[2] == ' ' || arg[2] == '\t'))
- cond = (struct expression *) parse_c_1 ((arg += 2, &arg),
- block_for_pc (pc), 0);
+ 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;
- sals.sals[i].pc = pc;
}
for (i = 0; i < sals.nelts; i++)
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;
- printf ("Breakpoint %d at 0x%x", b->number, b->address);
+ printf ("Breakpoint %d at %s", b->number, local_hex_string(b->address));
if (b->symtab)
printf (": file %s, line %d.", b->symtab->filename, b->line_number);
printf ("\n");
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
disable_catch (args)
{
/* Map the delete command to catch clauses described in ARGS. */
}
+#endif /* 0 */
static void
catch_command (arg, from_tty)
ALL_BREAKPOINTS (b)
while (b->next
- && b->next->address != NULL
+ && b->next->type != bp_watchpoint
&& (sal.pc ? b->next->address == sal.pc
: (b->next->symtab == sal.symtab
&& b->next->line_number == sal.line)))
}
if (from_tty) putchar ('\n');
}
- free (sals.sals);
+ free ((PTR)sals.sals);
}
\f
/* Delete breakpoint in BS if they are `delete' breakpoints.
bpstat bs;
{
for (; bs; bs = bs->next)
- if (bs->breakpoint_at && bs->breakpoint_at->enable == delete)
+ if (bs->breakpoint_at && bs->breakpoint_at->disposition == delete)
delete_breakpoint (bs->breakpoint_at);
}
/* Delete a breakpoint and clean up all traces of it in the data structures. */
-static void
+void
delete_breakpoint (bpt)
struct breakpoint *bpt;
{
free_command_lines (&bpt->commands);
if (bpt->cond)
- free (bpt->cond);
+ free ((PTR)bpt->cond);
if (bpt->cond_string != NULL)
- free (bpt->cond_string);
+ free ((PTR)bpt->cond_string);
if (bpt->addr_string != NULL)
- free (bpt->addr_string);
+ free ((PTR)bpt->addr_string);
+ if (bpt->exp_string != NULL)
+ free ((PTR)bpt->exp_string);
- if (xgdb_verbose && bpt->number >=0)
+ 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. */
for (bs = stop_bpstat; bs; bs = bs->next)
if (bs->breakpoint_at == bpt)
bs->breakpoint_at = NULL;
- free (bpt);
+ free ((PTR)bpt);
}
-static void map_breakpoint_numbers ();
-
static void
delete_command (arg, from_tty)
char *arg;
map_breakpoint_numbers (arg, delete_breakpoint);
}
-static void
+/* 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)
- int bint;
+ char *bint;
{
struct breakpoint *b = (struct breakpoint *)bint; /* get past catch_errs */
int i;
struct symtabs_and_lines sals;
- struct symtab_and_line sal;
char *s;
+ enum enable save_enable;
- if (b->address != NULL && b->addr_string != NULL)
+ switch (b->type)
{
+ case bp_breakpoint:
+ if (b->addr_string == NULL)
+ {
+ /* Anything without a string can't be re-set. */
+ delete_breakpoint (b);
+ return 0;
+ }
+ /* In case we have a problem, disable this breakpoint. We'll restore
+ its status if we succeed. */
+ save_enable = b->enable;
+ b->enable = disabled;
+
s = b->addr_string;
sals = decode_line_1 (&s, 1, (struct symtab *)NULL, 0);
for (i = 0; i < sals.nelts; i++)
{
- sal = sals.sals[i];
-
- b->symtab = sal.symtab;
- b->line_number = sal.line;
- if (sal.pc == 0 && sal.symtab != 0)
+ resolve_sal_pc (&sals.sals[i]);
+ if (b->symtab != sals.sals[i].symtab
+ || b->line_number != sals.sals[i].line
+ || b->address != sals.sals[i].pc)
{
- sal.pc = find_line_pc (sal.symtab, sal.line);
- if (sal.pc == 0)
- error ("No line %d in file \"%s\".",
- sal.line, sal.symtab->filename);
- }
- b->address = sal.pc;
+ b->symtab = sals.sals[i].symtab;
+ b->line_number = sals.sals[i].line;
+ b->address = sals.sals[i].pc;
- if (b->cond_string != NULL)
- {
- s = b->cond_string;
- b->cond = parse_c_1 (&s, block_for_pc (sal.pc), 0);
- }
+ 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);
+ }
- check_duplicates (b->address);
+ check_duplicates (b->address);
- mention (b);
+ mention (b);
+ }
+ b->enable = save_enable; /* Restore it, this worked. */
}
- free (sals.sals);
- }
- else
- {
- /* Anything without a string can't be re-set. */
+ 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:
delete_breakpoint (b);
+ break;
}
+
+ return 0;
}
/* Re-set all breakpoints after symbols have been re-loaded. */
void
breakpoint_re_set ()
{
- struct breakpoint *b;
+ struct breakpoint *b, *temp;
+ static char message1[] = "Error in re-setting breakpoint %d:\n";
+ char message[sizeof (message1) + 30 /* slop */];
- ALL_BREAKPOINTS (b)
+ /* If we have no current source symtab, and we have any breakpoints,
+ go through the work of making a source context. */
+ if (current_source_symtab == NULL && breakpoint_chain != 0)
{
- b->symtab = 0; /* Be sure we don't point to old dead symtab */
- (void) catch_errors (breakpoint_re_set_one, (int) b,
- "Error in re-setting breakpoint");
+ select_source_symtab (NULL);
}
+ ALL_BREAKPOINTS_SAFE (b, temp)
+ {
+ sprintf (message, message1, b->number); /* Format possible error msg */
+ catch_errors (breakpoint_re_set_one, (char *) b, message);
+ }
+
+ create_longjmp_breakpoint("longjmp");
+ create_longjmp_breakpoint("_longjmp");
+ create_longjmp_breakpoint("siglongjmp");
+ create_longjmp_breakpoint(NULL);
+
+#if 0
+ /* Took this out (temporaliy at least), since it produces an extra
+ blank line at startup. This messes up the gdbtests. -PB */
/* Blank line to finish off all those mention() messages we just printed. */
printf_filtered ("\n");
+#endif
}
\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;
}
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;
char *p1;
enable_breakpoint (bpt)
struct breakpoint *bpt;
{
+ FRAME save_selected_frame;
+ int save_selected_frame_level = -1;
+
bpt->enable = enabled;
- if (xgdb_verbose && bpt->number >= 0)
+ if (xgdb_verbose && bpt->type == bp_breakpoint)
printf ("breakpoint #%d enabled\n", bpt->number);
check_duplicates (bpt->address);
- if (bpt->val != NULL)
+ 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, from_tty)
char *args;
struct breakpoint *bpt;
if (args == 0)
ALL_BREAKPOINTS (bpt)
- enable_breakpoint (bpt);
+ switch (bpt->type)
+ {
+ case bp_breakpoint:
+ case bp_watchpoint:
+ enable_breakpoint (bpt);
+ default:
+ continue;
+ }
else
map_breakpoint_numbers (args, enable_breakpoint);
}
{
bpt->enable = disabled;
- if (xgdb_verbose && bpt->number >= 0)
- printf ("breakpoint #%d disabled\n", bpt->number);
+ 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, from_tty)
char *args;
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, from_tty)
char *args;
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, from_tty)
char *args;
return sals;
}
\f
-
-/* Chain containing all defined enable commands. */
-
-extern struct cmd_list_element
- *enablelist, *disablelist,
- *deletelist, *enablebreaklist;
-
-extern struct cmd_list_element *cmdlist;
-
void
_initialize_breakpoint ()
{
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\
The \"unset\" command is also an alias for \"delete\".",
&deletelist, "delete ", 1, &cmdlist);
add_com_alias ("d", "delete", class_breakpoint, 1);
- add_com_alias ("unset", "delete", class_alias, 1);
add_cmd ("breakpoints", class_alias, delete_command,
"Delete some breakpoints or auto-display expressions.\n\
add_com_alias ("brea", "break", class_run, 1);
add_info ("breakpoints", breakpoints_info,
- "Status of all breakpoints, or breakpoint number NUMBER.\n\
-Second column is \"y\" for enabled breakpoint, \"n\" for disabled,\n\
-\"o\" for enabled once (disable when hit), \"d\" for enable but delete when hit.\n\
-Then come the address and the file/line number.\n\n\
+ "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\
+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 \"$_\" and default examine address for \"x\"\n\
+are set to the address of the last breakpoint listed.\n\n\
+Convenience variable \"$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\
A watchpoint stops execution of your program whenever the value of\n\
an expression changes.");
- add_info ("watchpoints", watchpoints_info,
- "Status of all watchpoints, or watchpoint number NUMBER.\n\
-Second column is \"y\" for enabled watchpoints, \"n\" for disabled.");
+ add_info ("watchpoints", breakpoints_info,
+ "Synonym for ``info breakpoints''.");
+}
+
+/* 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