7662 lines
218 KiB
C
7662 lines
218 KiB
C
/* Everything about breakpoints, for GDB.
|
||
|
||
Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
|
||
1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software
|
||
Foundation, Inc.
|
||
|
||
This file is part of GDB.
|
||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 2 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program; if not, write to the Free Software
|
||
Foundation, Inc., 59 Temple Place - Suite 330,
|
||
Boston, MA 02111-1307, USA. */
|
||
|
||
#include "defs.h"
|
||
#include <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 "command.h"
|
||
#include "inferior.h"
|
||
#include "gdbthread.h"
|
||
#include "target.h"
|
||
#include "language.h"
|
||
#include "gdb_string.h"
|
||
#include "demangle.h"
|
||
#include "annotate.h"
|
||
#include "symfile.h"
|
||
#include "objfiles.h"
|
||
#include "source.h"
|
||
#include "linespec.h"
|
||
#include "completer.h"
|
||
#include "gdb.h"
|
||
#include "ui-out.h"
|
||
#include "cli/cli-script.h"
|
||
#include "gdb_assert.h"
|
||
#include "block.h"
|
||
|
||
#include "gdb-events.h"
|
||
|
||
/* Prototypes for local functions. */
|
||
|
||
static void until_break_command_continuation (struct continuation_arg *arg);
|
||
|
||
static void catch_command_1 (char *, int, int);
|
||
|
||
static void enable_delete_command (char *, int);
|
||
|
||
static void enable_delete_breakpoint (struct breakpoint *);
|
||
|
||
static void enable_once_command (char *, int);
|
||
|
||
static void enable_once_breakpoint (struct breakpoint *);
|
||
|
||
static void disable_command (char *, int);
|
||
|
||
static void enable_command (char *, int);
|
||
|
||
static void map_breakpoint_numbers (char *, void (*)(struct breakpoint *));
|
||
|
||
static void ignore_command (char *, int);
|
||
|
||
static int breakpoint_re_set_one (void *);
|
||
|
||
static void clear_command (char *, int);
|
||
|
||
static void catch_command (char *, int);
|
||
|
||
static void watch_command (char *, int);
|
||
|
||
static int can_use_hardware_watchpoint (struct value *);
|
||
|
||
extern void break_at_finish_command (char *, int);
|
||
extern void break_at_finish_at_depth_command (char *, int);
|
||
|
||
extern void tbreak_at_finish_command (char *, int);
|
||
|
||
static void break_command_1 (char *, int, int);
|
||
|
||
static void mention (struct breakpoint *);
|
||
|
||
struct breakpoint *set_raw_breakpoint (struct symtab_and_line, enum bptype);
|
||
|
||
static void check_duplicates (struct breakpoint *);
|
||
|
||
static void describe_other_breakpoints (CORE_ADDR, asection *);
|
||
|
||
static void breakpoints_info (char *, int);
|
||
|
||
static void breakpoint_1 (int, int);
|
||
|
||
static bpstat bpstat_alloc (struct breakpoint *, bpstat);
|
||
|
||
static int breakpoint_cond_eval (void *);
|
||
|
||
static void cleanup_executing_breakpoints (void *);
|
||
|
||
static void commands_command (char *, int);
|
||
|
||
static void condition_command (char *, int);
|
||
|
||
static int get_number_trailer (char **, int);
|
||
|
||
void set_breakpoint_count (int);
|
||
|
||
typedef enum
|
||
{
|
||
mark_inserted,
|
||
mark_uninserted
|
||
}
|
||
insertion_state_t;
|
||
|
||
static int remove_breakpoint (struct breakpoint *, insertion_state_t);
|
||
|
||
static enum print_stop_action print_it_typical (bpstat);
|
||
|
||
static enum print_stop_action print_bp_stop_message (bpstat bs);
|
||
|
||
typedef struct
|
||
{
|
||
enum exception_event_kind kind;
|
||
int enable_p;
|
||
}
|
||
args_for_catchpoint_enable;
|
||
|
||
static int watchpoint_check (void *);
|
||
|
||
static int cover_target_enable_exception_callback (void *);
|
||
|
||
static void maintenance_info_breakpoints (char *, int);
|
||
|
||
static void create_longjmp_breakpoint (char *);
|
||
|
||
static void create_overlay_event_breakpoint (char *);
|
||
|
||
static int hw_breakpoint_used_count (void);
|
||
|
||
static int hw_watchpoint_used_count (enum bptype, int *);
|
||
|
||
static void hbreak_command (char *, int);
|
||
|
||
static void thbreak_command (char *, int);
|
||
|
||
static void watch_command_1 (char *, int, int);
|
||
|
||
static void rwatch_command (char *, int);
|
||
|
||
static void awatch_command (char *, int);
|
||
|
||
static void do_enable_breakpoint (struct breakpoint *, enum bpdisp);
|
||
|
||
static void solib_load_unload_1 (char *hookname,
|
||
int tempflag,
|
||
char *dll_pathname,
|
||
char *cond_string, enum bptype bp_kind);
|
||
|
||
static void create_fork_vfork_event_catchpoint (int tempflag,
|
||
char *cond_string,
|
||
enum bptype bp_kind);
|
||
|
||
static void break_at_finish_at_depth_command_1 (char *arg,
|
||
int flag, int from_tty);
|
||
|
||
static void break_at_finish_command_1 (char *arg, int flag, int from_tty);
|
||
|
||
static void stop_command (char *arg, int from_tty);
|
||
|
||
static void stopin_command (char *arg, int from_tty);
|
||
|
||
static void stopat_command (char *arg, int from_tty);
|
||
|
||
static char *ep_find_event_name_end (char *arg);
|
||
|
||
static char *ep_parse_optional_if_clause (char **arg);
|
||
|
||
static char *ep_parse_optional_filename (char **arg);
|
||
|
||
#if defined(CHILD_INSERT_EXEC_CATCHPOINT)
|
||
static void catch_exec_command_1 (char *arg, int tempflag, int from_tty);
|
||
#endif
|
||
|
||
static void create_exception_catchpoint (int tempflag, char *cond_string,
|
||
enum exception_event_kind ex_event,
|
||
struct symtab_and_line *sal);
|
||
|
||
static void catch_exception_command_1 (enum exception_event_kind ex_event,
|
||
char *arg, int tempflag, int from_tty);
|
||
|
||
static void tcatch_command (char *arg, int from_tty);
|
||
|
||
static void ep_skip_leading_whitespace (char **s);
|
||
|
||
/* Prototypes for exported functions. */
|
||
|
||
/* If FALSE, gdb will not use hardware support for watchpoints, even
|
||
if such is available. */
|
||
static int can_use_hw_watchpoints;
|
||
|
||
void _initialize_breakpoint (void);
|
||
|
||
extern int addressprint; /* Print machine addresses? */
|
||
|
||
/* Are we executing breakpoint commands? */
|
||
static int executing_breakpoint_commands;
|
||
|
||
/* Are overlay event breakpoints enabled? */
|
||
static int overlay_events_enabled;
|
||
|
||
/* 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)
|
||
|
||
/* True if SHIFT_INST_REGS defined, false otherwise. */
|
||
|
||
int must_shift_inst_regs =
|
||
#if defined(SHIFT_INST_REGS)
|
||
1
|
||
#else
|
||
0
|
||
#endif
|
||
;
|
||
|
||
/* True if breakpoint hit counts should be displayed in breakpoint info. */
|
||
|
||
int show_breakpoint_hit_counts = 1;
|
||
|
||
/* Chain of all breakpoints defined. */
|
||
|
||
struct breakpoint *breakpoint_chain;
|
||
|
||
/* Number of last breakpoint made. */
|
||
|
||
int breakpoint_count;
|
||
|
||
/* Pointer to current exception event record */
|
||
static struct exception_event_record *current_exception_event;
|
||
|
||
/* Indicator of whether exception catchpoints should be nuked
|
||
between runs of a program */
|
||
int exception_catchpoints_are_fragile = 0;
|
||
|
||
/* Indicator of when exception catchpoints set-up should be
|
||
reinitialized -- e.g. when program is re-run */
|
||
int exception_support_initialized = 0;
|
||
|
||
/* This function returns a pointer to the string representation of the
|
||
pathname of the dynamically-linked library that has just been
|
||
loaded.
|
||
|
||
This function must be used only when SOLIB_HAVE_LOAD_EVENT is TRUE,
|
||
or undefined results are guaranteed.
|
||
|
||
This string's contents are only valid immediately after the
|
||
inferior has stopped in the dynamic linker hook, and becomes
|
||
invalid as soon as the inferior is continued. Clients should make
|
||
a copy of this string if they wish to continue the inferior and
|
||
then access the string. */
|
||
|
||
#ifndef SOLIB_LOADED_LIBRARY_PATHNAME
|
||
#define SOLIB_LOADED_LIBRARY_PATHNAME(pid) ""
|
||
#endif
|
||
|
||
/* This function returns a pointer to the string representation of the
|
||
pathname of the dynamically-linked library that has just been
|
||
unloaded.
|
||
|
||
This function must be used only when SOLIB_HAVE_UNLOAD_EVENT is
|
||
TRUE, or undefined results are guaranteed.
|
||
|
||
This string's contents are only valid immediately after the
|
||
inferior has stopped in the dynamic linker hook, and becomes
|
||
invalid as soon as the inferior is continued. Clients should make
|
||
a copy of this string if they wish to continue the inferior and
|
||
then access the string. */
|
||
|
||
#ifndef SOLIB_UNLOADED_LIBRARY_PATHNAME
|
||
#define SOLIB_UNLOADED_LIBRARY_PATHNAME(pid) ""
|
||
#endif
|
||
|
||
/* This function is called by the "catch load" command. It allows the
|
||
debugger to be notified by the dynamic linker when a specified
|
||
library file (or any library file, if filename is NULL) is loaded. */
|
||
|
||
#ifndef SOLIB_CREATE_CATCH_LOAD_HOOK
|
||
#define SOLIB_CREATE_CATCH_LOAD_HOOK(pid,tempflag,filename,cond_string) \
|
||
error ("catch of library loads not yet implemented on this platform")
|
||
#endif
|
||
|
||
/* This function is called by the "catch unload" command. It allows
|
||
the debugger to be notified by the dynamic linker when a specified
|
||
library file (or any library file, if filename is NULL) is
|
||
unloaded. */
|
||
|
||
#ifndef SOLIB_CREATE_CATCH_UNLOAD_HOOK
|
||
#define SOLIB_CREATE_CATCH_UNLOAD_HOOK(pid,tempflag,filename,cond_string) \
|
||
error ("catch of library unloads not yet implemented on this platform")
|
||
#endif
|
||
|
||
/* Set breakpoint count to NUM. */
|
||
|
||
void
|
||
set_breakpoint_count (int num)
|
||
{
|
||
breakpoint_count = num;
|
||
set_internalvar (lookup_internalvar ("bpnum"),
|
||
value_from_longest (builtin_type_int, (LONGEST) num));
|
||
}
|
||
|
||
/* Used in run_command to zero the hit count when a new run starts. */
|
||
|
||
void
|
||
clear_breakpoint_hit_counts (void)
|
||
{
|
||
struct breakpoint *b;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
b->hit_count = 0;
|
||
}
|
||
|
||
/* Default address, symtab and line to put a breakpoint at
|
||
for "break" command with no arg.
|
||
if default_breakpoint_valid is zero, the other three are
|
||
not valid, and "break" with no arg is an error.
|
||
|
||
This set by print_stack_frame, which calls set_default_breakpoint. */
|
||
|
||
int default_breakpoint_valid;
|
||
CORE_ADDR default_breakpoint_address;
|
||
struct symtab *default_breakpoint_symtab;
|
||
int default_breakpoint_line;
|
||
|
||
/* *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 "$" followed by the name
|
||
of a convenience variable. Making it an expression wouldn't work well
|
||
for map_breakpoint_numbers (e.g. "4 + 5 + 6").
|
||
|
||
TRAILER is a character which can be found after the number; most
|
||
commonly this is `-'. If you don't want a trailer, use \0. */
|
||
static int
|
||
get_number_trailer (char **pp, int trailer)
|
||
{
|
||
int retval = 0; /* default */
|
||
char *p = *pp;
|
||
|
||
if (p == NULL)
|
||
/* Empty line means refer to the last breakpoint. */
|
||
return breakpoint_count;
|
||
else if (*p == '$')
|
||
{
|
||
/* Make a copy of the name, so we can null-terminate it
|
||
to pass to lookup_internalvar(). */
|
||
char *varname;
|
||
char *start = ++p;
|
||
struct 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)
|
||
retval = (int) value_as_long (val);
|
||
else
|
||
{
|
||
printf_filtered ("Convenience variable must have integer value.\n");
|
||
retval = 0;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (*p == '-')
|
||
++p;
|
||
while (*p >= '0' && *p <= '9')
|
||
++p;
|
||
if (p == *pp)
|
||
/* There is no number here. (e.g. "cond a == b"). */
|
||
{
|
||
/* Skip non-numeric token */
|
||
while (*p && !isspace((int) *p))
|
||
++p;
|
||
/* Return zero, which caller must interpret as error. */
|
||
retval = 0;
|
||
}
|
||
else
|
||
retval = atoi (*pp);
|
||
}
|
||
if (!(isspace (*p) || *p == '\0' || *p == trailer))
|
||
{
|
||
/* Trailing junk: return 0 and let caller print error msg. */
|
||
while (!(isspace (*p) || *p == '\0' || *p == trailer))
|
||
++p;
|
||
retval = 0;
|
||
}
|
||
while (isspace (*p))
|
||
p++;
|
||
*pp = p;
|
||
return retval;
|
||
}
|
||
|
||
|
||
/* Like get_number_trailer, but don't allow a trailer. */
|
||
int
|
||
get_number (char **pp)
|
||
{
|
||
return get_number_trailer (pp, '\0');
|
||
}
|
||
|
||
/* Parse a number or a range.
|
||
* A number will be of the form handled by get_number.
|
||
* A range will be of the form <number1> - <number2>, and
|
||
* will represent all the integers between number1 and number2,
|
||
* inclusive.
|
||
*
|
||
* While processing a range, this fuction is called iteratively;
|
||
* At each call it will return the next value in the range.
|
||
*
|
||
* At the beginning of parsing a range, the char pointer PP will
|
||
* be advanced past <number1> and left pointing at the '-' token.
|
||
* Subsequent calls will not advance the pointer until the range
|
||
* is completed. The call that completes the range will advance
|
||
* pointer PP past <number2>.
|
||
*/
|
||
|
||
int
|
||
get_number_or_range (char **pp)
|
||
{
|
||
static int last_retval, end_value;
|
||
static char *end_ptr;
|
||
static int in_range = 0;
|
||
|
||
if (**pp != '-')
|
||
{
|
||
/* Default case: pp is pointing either to a solo number,
|
||
or to the first number of a range. */
|
||
last_retval = get_number_trailer (pp, '-');
|
||
if (**pp == '-')
|
||
{
|
||
char **temp;
|
||
|
||
/* This is the start of a range (<number1> - <number2>).
|
||
Skip the '-', parse and remember the second number,
|
||
and also remember the end of the final token. */
|
||
|
||
temp = &end_ptr;
|
||
end_ptr = *pp + 1;
|
||
while (isspace ((int) *end_ptr))
|
||
end_ptr++; /* skip white space */
|
||
end_value = get_number (temp);
|
||
if (end_value < last_retval)
|
||
{
|
||
error ("inverted range");
|
||
}
|
||
else if (end_value == last_retval)
|
||
{
|
||
/* degenerate range (number1 == number2). Advance the
|
||
token pointer so that the range will be treated as a
|
||
single number. */
|
||
*pp = end_ptr;
|
||
}
|
||
else
|
||
in_range = 1;
|
||
}
|
||
}
|
||
else if (! in_range)
|
||
error ("negative value");
|
||
else
|
||
{
|
||
/* pp points to the '-' that betokens a range. All
|
||
number-parsing has already been done. Return the next
|
||
integer value (one greater than the saved previous value).
|
||
Do not advance the token pointer 'pp' until the end of range
|
||
is reached. */
|
||
|
||
if (++last_retval == end_value)
|
||
{
|
||
/* End of range reached; advance token pointer. */
|
||
*pp = end_ptr;
|
||
in_range = 0;
|
||
}
|
||
}
|
||
return last_retval;
|
||
}
|
||
|
||
|
||
|
||
/* condition N EXP -- set break condition of breakpoint N to EXP. */
|
||
|
||
static void
|
||
condition_command (char *arg, int from_tty)
|
||
{
|
||
struct breakpoint *b;
|
||
char *p;
|
||
int bnum;
|
||
|
||
if (arg == 0)
|
||
error_no_arg ("breakpoint number");
|
||
|
||
p = arg;
|
||
bnum = get_number (&p);
|
||
if (bnum == 0)
|
||
error ("Bad breakpoint argument: '%s'", arg);
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->number == bnum)
|
||
{
|
||
if (b->cond)
|
||
{
|
||
xfree (b->cond);
|
||
b->cond = 0;
|
||
}
|
||
if (b->cond_string != NULL)
|
||
xfree (b->cond_string);
|
||
|
||
if (*p == 0)
|
||
{
|
||
b->cond = 0;
|
||
b->cond_string = NULL;
|
||
if (from_tty)
|
||
printf_filtered ("Breakpoint %d now unconditional.\n", bnum);
|
||
}
|
||
else
|
||
{
|
||
arg = p;
|
||
/* I don't know if it matters whether this is the string the user
|
||
typed in or the decompiled expression. */
|
||
b->cond_string = savestring (arg, strlen (arg));
|
||
b->cond = parse_exp_1 (&arg, block_for_pc (b->address), 0);
|
||
if (*arg)
|
||
error ("Junk at end of expression");
|
||
}
|
||
breakpoints_changed ();
|
||
breakpoint_modify_event (b->number);
|
||
return;
|
||
}
|
||
|
||
error ("No breakpoint number %d.", bnum);
|
||
}
|
||
|
||
static void
|
||
commands_command (char *arg, int from_tty)
|
||
{
|
||
struct breakpoint *b;
|
||
char *p;
|
||
int bnum;
|
||
struct command_line *l;
|
||
|
||
/* If we allowed this, we would have problems with when to
|
||
free the storage, if we change the commands currently
|
||
being read from. */
|
||
|
||
if (executing_breakpoint_commands)
|
||
error ("Can't use the \"commands\" command among a breakpoint's commands.");
|
||
|
||
p = arg;
|
||
bnum = get_number (&p);
|
||
|
||
if (p && *p)
|
||
error ("Unexpected extra arguments following breakpoint number.");
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->number == bnum)
|
||
{
|
||
char *tmpbuf = xstrprintf ("Type commands for when breakpoint %d is hit, one per line.",
|
||
bnum);
|
||
struct cleanup *cleanups = make_cleanup (xfree, tmpbuf);
|
||
l = read_command_lines (tmpbuf, from_tty);
|
||
do_cleanups (cleanups);
|
||
free_command_lines (&b->commands);
|
||
b->commands = l;
|
||
breakpoints_changed ();
|
||
breakpoint_modify_event (b->number);
|
||
return;
|
||
}
|
||
error ("No breakpoint number %d.", bnum);
|
||
}
|
||
|
||
/* 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 (CORE_ADDR memaddr, char *myaddr, unsigned len)
|
||
{
|
||
int status;
|
||
struct breakpoint *b;
|
||
CORE_ADDR bp_addr = 0;
|
||
int bp_size = 0;
|
||
|
||
if (BREAKPOINT_FROM_PC (&bp_addr, &bp_size) == NULL)
|
||
/* No breakpoints on this machine. */
|
||
return target_read_memory (memaddr, myaddr, len);
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
{
|
||
if (b->type == bp_none)
|
||
warning ("reading through apparently deleted breakpoint #%d?",
|
||
b->number);
|
||
|
||
/* memory breakpoint? */
|
||
if (b->type == bp_watchpoint
|
||
|| b->type == bp_hardware_watchpoint
|
||
|| b->type == bp_read_watchpoint
|
||
|| b->type == bp_access_watchpoint)
|
||
continue;
|
||
/* bp in memory? */
|
||
if (!b->inserted)
|
||
continue;
|
||
/* Addresses and length of the part of the breakpoint that
|
||
we need to copy. */
|
||
/* XXXX The m68k, sh and h8300 have different local and remote
|
||
breakpoint values. BREAKPOINT_FROM_PC still manages to
|
||
correctly determine the breakpoints memory address and size
|
||
for these targets. */
|
||
bp_addr = b->address;
|
||
bp_size = 0;
|
||
if (BREAKPOINT_FROM_PC (&bp_addr, &bp_size) == NULL)
|
||
continue;
|
||
if (bp_size == 0)
|
||
/* bp isn't valid */
|
||
continue;
|
||
if (bp_addr + bp_size <= memaddr)
|
||
/* The breakpoint is entirely before the chunk of memory we
|
||
are reading. */
|
||
continue;
|
||
if (bp_addr >= memaddr + len)
|
||
/* The breakpoint is entirely after the chunk of memory we are
|
||
reading. */
|
||
continue;
|
||
/* Copy the breakpoint from the shadow contents, and recurse for
|
||
the things before and after. */
|
||
{
|
||
/* Offset within shadow_contents. */
|
||
int bptoffset = 0;
|
||
|
||
if (bp_addr < memaddr)
|
||
{
|
||
/* Only copy the second part of the breakpoint. */
|
||
bp_size -= memaddr - bp_addr;
|
||
bptoffset = memaddr - bp_addr;
|
||
bp_addr = memaddr;
|
||
}
|
||
|
||
if (bp_addr + bp_size > memaddr + len)
|
||
{
|
||
/* Only copy the first part of the breakpoint. */
|
||
bp_size -= (bp_addr + bp_size) - (memaddr + len);
|
||
}
|
||
|
||
memcpy (myaddr + bp_addr - memaddr,
|
||
b->shadow_contents + bptoffset, bp_size);
|
||
|
||
if (bp_addr > memaddr)
|
||
{
|
||
/* Copy the section of memory before the breakpoint. */
|
||
status = read_memory_nobpt (memaddr, myaddr, bp_addr - memaddr);
|
||
if (status != 0)
|
||
return status;
|
||
}
|
||
|
||
if (bp_addr + bp_size < memaddr + len)
|
||
{
|
||
/* Copy the section of memory after the breakpoint. */
|
||
status = read_memory_nobpt (bp_addr + bp_size,
|
||
myaddr + bp_addr + bp_size - memaddr,
|
||
memaddr + len - (bp_addr + bp_size));
|
||
if (status != 0)
|
||
return status;
|
||
}
|
||
return 0;
|
||
}
|
||
}
|
||
/* Nothing overlaps. Just call read_memory_noerr. */
|
||
return target_read_memory (memaddr, myaddr, len);
|
||
}
|
||
|
||
|
||
/* A wrapper function for inserting catchpoints. */
|
||
static int
|
||
insert_catchpoint (struct ui_out *uo, void *args)
|
||
{
|
||
struct breakpoint *b = (struct breakpoint *) args;
|
||
int val = -1;
|
||
|
||
switch (b->type)
|
||
{
|
||
case bp_catch_fork:
|
||
val = target_insert_fork_catchpoint (PIDGET (inferior_ptid));
|
||
break;
|
||
case bp_catch_vfork:
|
||
val = target_insert_vfork_catchpoint (PIDGET (inferior_ptid));
|
||
break;
|
||
case bp_catch_exec:
|
||
val = target_insert_exec_catchpoint (PIDGET (inferior_ptid));
|
||
break;
|
||
default:
|
||
internal_error (__FILE__, __LINE__, "unknown breakpoint type");
|
||
break;
|
||
}
|
||
|
||
if (val < 0)
|
||
throw_exception (RETURN_ERROR);
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* insert_breakpoints is used when starting or continuing the program.
|
||
remove_breakpoints is used when the program stops.
|
||
Both return zero if successful,
|
||
or an `errno' value if could not write the inferior. */
|
||
|
||
int
|
||
insert_breakpoints (void)
|
||
{
|
||
struct breakpoint *b, *temp;
|
||
int return_val = 0; /* return success code. */
|
||
int val = 0;
|
||
int disabled_breaks = 0;
|
||
int hw_breakpoint_error = 0;
|
||
#ifdef ONE_PROCESS_WRITETEXT
|
||
int process_warning = 0;
|
||
#endif
|
||
|
||
struct ui_file *tmp_error_stream = mem_fileopen ();
|
||
make_cleanup_ui_file_delete (tmp_error_stream);
|
||
|
||
/* Explicitly mark the warning -- this will only be printed if
|
||
there was an error. */
|
||
fprintf_unfiltered (tmp_error_stream, "Warning:\n");
|
||
|
||
ALL_BREAKPOINTS_SAFE (b, temp)
|
||
{
|
||
/* Permanent breakpoints cannot be inserted or removed. Disabled
|
||
breakpoints should not be inserted. */
|
||
if (b->enable_state != bp_enabled)
|
||
continue;
|
||
|
||
if ((b->type == bp_watchpoint
|
||
|| b->type == bp_hardware_watchpoint
|
||
|| b->type == bp_read_watchpoint
|
||
|| b->type == bp_access_watchpoint) && (!b->val))
|
||
{
|
||
struct value *val;
|
||
val = evaluate_expression (b->exp);
|
||
release_value (val);
|
||
if (VALUE_LAZY (val))
|
||
value_fetch_lazy (val);
|
||
b->val = val;
|
||
}
|
||
if (b->type != bp_watchpoint
|
||
&& b->type != bp_hardware_watchpoint
|
||
&& b->type != bp_read_watchpoint
|
||
&& b->type != bp_access_watchpoint
|
||
&& b->type != bp_catch_fork
|
||
&& b->type != bp_catch_vfork
|
||
&& b->type != bp_catch_exec
|
||
&& b->type != bp_catch_throw
|
||
&& b->type != bp_catch_catch
|
||
&& !b->inserted
|
||
&& !b->duplicate)
|
||
{
|
||
/* "Normal" instruction breakpoint: either the standard
|
||
trap-instruction bp (bp_breakpoint), or a
|
||
bp_hardware_breakpoint. */
|
||
|
||
/* First check to see if we have to handle an overlay. */
|
||
if (overlay_debugging == ovly_off
|
||
|| b->section == NULL
|
||
|| !(section_is_overlay (b->section)))
|
||
{
|
||
/* No overlay handling: just set the breakpoint. */
|
||
|
||
if (b->type == bp_hardware_breakpoint)
|
||
val = target_insert_hw_breakpoint (b->address,
|
||
b->shadow_contents);
|
||
else
|
||
val = target_insert_breakpoint (b->address, b->shadow_contents);
|
||
}
|
||
else
|
||
{
|
||
/* This breakpoint is in an overlay section.
|
||
Shall we set a breakpoint at the LMA? */
|
||
if (!overlay_events_enabled)
|
||
{
|
||
/* Yes -- overlay event support is not active,
|
||
so we must try to set a breakpoint at the LMA.
|
||
This will not work for a hardware breakpoint. */
|
||
if (b->type == bp_hardware_breakpoint)
|
||
warning ("hardware breakpoint %d not supported in overlay!\n",
|
||
b->number);
|
||
else
|
||
{
|
||
CORE_ADDR addr = overlay_unmapped_address (b->address,
|
||
b->section);
|
||
/* Set a software (trap) breakpoint at the LMA. */
|
||
val = target_insert_breakpoint (addr, b->shadow_contents);
|
||
if (val != 0)
|
||
fprintf_unfiltered (tmp_error_stream,
|
||
"Overlay breakpoint %d failed: in ROM?",
|
||
b->number);
|
||
}
|
||
}
|
||
/* Shall we set a breakpoint at the VMA? */
|
||
if (section_is_mapped (b->section))
|
||
{
|
||
/* Yes. This overlay section is mapped into memory. */
|
||
if (b->type == bp_hardware_breakpoint)
|
||
val = target_insert_hw_breakpoint (b->address,
|
||
b->shadow_contents);
|
||
else
|
||
val = target_insert_breakpoint (b->address,
|
||
b->shadow_contents);
|
||
}
|
||
else
|
||
{
|
||
/* No. This breakpoint will not be inserted.
|
||
No error, but do not mark the bp as 'inserted'. */
|
||
continue;
|
||
}
|
||
}
|
||
|
||
if (val)
|
||
{
|
||
/* Can't set the breakpoint. */
|
||
#if defined (DISABLE_UNSETTABLE_BREAK)
|
||
if (DISABLE_UNSETTABLE_BREAK (b->address))
|
||
{
|
||
/* See also: disable_breakpoints_in_shlibs. */
|
||
val = 0;
|
||
b->enable_state = bp_shlib_disabled;
|
||
if (!disabled_breaks)
|
||
{
|
||
fprintf_unfiltered (tmp_error_stream,
|
||
"Cannot insert breakpoint %d.\n",
|
||
b->number);
|
||
fprintf_unfiltered (tmp_error_stream,
|
||
"Temporarily disabling shared library breakpoints:\n");
|
||
}
|
||
disabled_breaks = 1;
|
||
fprintf_unfiltered (tmp_error_stream,
|
||
"breakpoint #%d\n", b->number);
|
||
}
|
||
else
|
||
#endif
|
||
{
|
||
#ifdef ONE_PROCESS_WRITETEXT
|
||
process_warning = 1;
|
||
#endif
|
||
if (b->type == bp_hardware_breakpoint)
|
||
{
|
||
hw_breakpoint_error = 1;
|
||
fprintf_unfiltered (tmp_error_stream,
|
||
"Cannot insert hardware breakpoint %d.\n",
|
||
b->number);
|
||
}
|
||
else
|
||
{
|
||
fprintf_unfiltered (tmp_error_stream,
|
||
"Cannot insert breakpoint %d.\n",
|
||
b->number);
|
||
fprintf_filtered (tmp_error_stream,
|
||
"Error accessing memory address ");
|
||
print_address_numeric (b->address, 1, tmp_error_stream);
|
||
fprintf_filtered (tmp_error_stream, ": %s.\n",
|
||
safe_strerror (val));
|
||
}
|
||
|
||
}
|
||
}
|
||
else
|
||
b->inserted = 1;
|
||
|
||
if (val)
|
||
return_val = val; /* remember failure */
|
||
}
|
||
else if (ep_is_exception_catchpoint (b)
|
||
&& !b->inserted
|
||
&& !b->duplicate)
|
||
|
||
{
|
||
/* If we get here, we must have a callback mechanism for exception
|
||
events -- with g++ style embedded label support, we insert
|
||
ordinary breakpoints and not catchpoints. */
|
||
val = target_insert_breakpoint (b->address, b->shadow_contents);
|
||
if (val)
|
||
{
|
||
/* Couldn't set breakpoint for some reason */
|
||
fprintf_unfiltered (tmp_error_stream,
|
||
"Cannot insert catchpoint %d; disabling it.\n",
|
||
b->number);
|
||
fprintf_filtered (tmp_error_stream,
|
||
"Error accessing memory address ");
|
||
print_address_numeric (b->address, 1, tmp_error_stream);
|
||
fprintf_filtered (tmp_error_stream, ": %s.\n",
|
||
safe_strerror (val));
|
||
b->enable_state = bp_disabled;
|
||
}
|
||
else
|
||
{
|
||
/* Bp set, now make sure callbacks are enabled */
|
||
/* Format possible error msg */
|
||
char *message = xstrprintf ("Error inserting catchpoint %d:\n",
|
||
b->number);
|
||
struct cleanup *cleanups = make_cleanup (xfree, message);
|
||
int val;
|
||
args_for_catchpoint_enable args;
|
||
args.kind = b->type == bp_catch_catch ?
|
||
EX_EVENT_CATCH : EX_EVENT_THROW;
|
||
args.enable_p = 1;
|
||
val = catch_errors (cover_target_enable_exception_callback,
|
||
&args, message, RETURN_MASK_ALL);
|
||
do_cleanups (cleanups);
|
||
if (val != 0 && val != -1)
|
||
{
|
||
b->inserted = 1;
|
||
}
|
||
/* Check if something went wrong; val == 0 can be ignored */
|
||
if (val == -1)
|
||
{
|
||
/* something went wrong */
|
||
fprintf_unfiltered (tmp_error_stream,
|
||
"Cannot insert catchpoint %d; disabling it.\n",
|
||
b->number);
|
||
b->enable_state = bp_disabled;
|
||
}
|
||
}
|
||
|
||
if (val)
|
||
return_val = val; /* remember failure */
|
||
}
|
||
|
||
else if ((b->type == bp_hardware_watchpoint ||
|
||
b->type == bp_read_watchpoint ||
|
||
b->type == bp_access_watchpoint)
|
||
&& b->disposition != disp_del_at_next_stop
|
||
&& !b->inserted
|
||
&& !b->duplicate)
|
||
{
|
||
struct frame_info *saved_frame;
|
||
int saved_level, within_current_scope;
|
||
struct value *mark = value_mark ();
|
||
struct value *v;
|
||
|
||
/* Save the current frame and level so we can restore it after
|
||
evaluating the watchpoint expression on its own frame. */
|
||
saved_frame = deprecated_selected_frame;
|
||
saved_level = frame_relative_level (deprecated_selected_frame);
|
||
|
||
/* Determine if the watchpoint is within scope. */
|
||
if (b->exp_valid_block == NULL)
|
||
within_current_scope = 1;
|
||
else
|
||
{
|
||
struct frame_info *fi;
|
||
fi = frame_find_by_id (b->watchpoint_frame);
|
||
within_current_scope = (fi != NULL);
|
||
if (within_current_scope)
|
||
select_frame (fi);
|
||
}
|
||
|
||
if (within_current_scope)
|
||
{
|
||
/* Evaluate the expression and cut the chain of values
|
||
produced off from the value chain.
|
||
|
||
Make sure the value returned isn't lazy; we use
|
||
laziness to determine what memory GDB actually needed
|
||
in order to compute the value of the expression. */
|
||
v = evaluate_expression (b->exp);
|
||
VALUE_CONTENTS(v);
|
||
value_release_to_mark (mark);
|
||
|
||
b->val_chain = v;
|
||
b->inserted = 1;
|
||
|
||
/* Look at each value on the value chain. */
|
||
for (; v; v = v->next)
|
||
{
|
||
/* If it's a memory location, and GDB actually needed
|
||
its contents to evaluate the expression, then we
|
||
must watch it. */
|
||
if (VALUE_LVAL (v) == lval_memory
|
||
&& ! VALUE_LAZY (v))
|
||
{
|
||
struct type *vtype = check_typedef (VALUE_TYPE (v));
|
||
|
||
/* We only watch structs and arrays if user asked
|
||
for it explicitly, never if they just happen to
|
||
appear in the middle of some value chain. */
|
||
if (v == b->val_chain
|
||
|| (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
|
||
&& TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
|
||
{
|
||
CORE_ADDR addr;
|
||
int len, type;
|
||
|
||
addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
|
||
len = TYPE_LENGTH (VALUE_TYPE (v));
|
||
type = hw_write;
|
||
if (b->type == bp_read_watchpoint)
|
||
type = hw_read;
|
||
else if (b->type == bp_access_watchpoint)
|
||
type = hw_access;
|
||
|
||
val = target_insert_watchpoint (addr, len, type);
|
||
if (val == -1)
|
||
{
|
||
/* Don't exit the loop, try to insert
|
||
every value on the value chain. That's
|
||
because we will be removing all the
|
||
watches below, and removing a
|
||
watchpoint we didn't insert could have
|
||
adverse effects. */
|
||
b->inserted = 0;
|
||
}
|
||
val = 0;
|
||
}
|
||
}
|
||
}
|
||
/* Failure to insert a watchpoint on any memory value in the
|
||
value chain brings us here. */
|
||
if (!b->inserted)
|
||
{
|
||
remove_breakpoint (b, mark_uninserted);
|
||
hw_breakpoint_error = 1;
|
||
fprintf_unfiltered (tmp_error_stream,
|
||
"Could not insert hardware watchpoint %d.\n",
|
||
b->number);
|
||
val = -1;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
printf_filtered ("Hardware watchpoint %d deleted ", b->number);
|
||
printf_filtered ("because the program has left the block \n");
|
||
printf_filtered ("in which its expression is valid.\n");
|
||
if (b->related_breakpoint)
|
||
b->related_breakpoint->disposition = disp_del_at_next_stop;
|
||
b->disposition = disp_del_at_next_stop;
|
||
}
|
||
|
||
/* Restore the frame and level. */
|
||
if ((saved_frame != deprecated_selected_frame) ||
|
||
(saved_level != frame_relative_level (deprecated_selected_frame)))
|
||
select_frame (saved_frame);
|
||
|
||
if (val)
|
||
return_val = val; /* remember failure */
|
||
}
|
||
else if ((b->type == bp_catch_fork
|
||
|| b->type == bp_catch_vfork
|
||
|| b->type == bp_catch_exec)
|
||
&& !b->inserted
|
||
&& !b->duplicate)
|
||
{
|
||
char *prefix = xstrprintf ("warning: inserting catchpoint %d: ",
|
||
b->number);
|
||
struct cleanup *cleanups = make_cleanup (xfree, prefix);
|
||
val = catch_exceptions (uiout, insert_catchpoint, b, prefix,
|
||
RETURN_MASK_ERROR);
|
||
do_cleanups (cleanups);
|
||
if (val < 0)
|
||
b->enable_state = bp_disabled;
|
||
else
|
||
b->inserted = 1;
|
||
}
|
||
}
|
||
|
||
if (return_val)
|
||
{
|
||
/* If a hardware breakpoint or watchpoint was inserted, add a
|
||
message about possibly exhausted resources. */
|
||
if (hw_breakpoint_error)
|
||
{
|
||
fprintf_unfiltered (tmp_error_stream,
|
||
"Could not insert hardware breakpoints:\n\
|
||
You may have requested too many hardware breakpoints/watchpoints.\n");
|
||
}
|
||
#ifdef ONE_PROCESS_WRITETEXT
|
||
if (process_warning)
|
||
fprintf_unfiltered (tmp_error_stream,
|
||
"The same program may be running in another process.");
|
||
#endif
|
||
target_terminal_ours_for_output ();
|
||
error_stream (tmp_error_stream);
|
||
}
|
||
return return_val;
|
||
}
|
||
|
||
int
|
||
remove_breakpoints (void)
|
||
{
|
||
struct breakpoint *b;
|
||
int val;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
{
|
||
if (b->inserted)
|
||
{
|
||
val = remove_breakpoint (b, mark_uninserted);
|
||
if (val != 0)
|
||
return val;
|
||
}
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
int
|
||
remove_hw_watchpoints (void)
|
||
{
|
||
struct breakpoint *b;
|
||
int val;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
{
|
||
if (b->inserted
|
||
&& (b->type == bp_hardware_watchpoint
|
||
|| b->type == bp_read_watchpoint
|
||
|| b->type == bp_access_watchpoint))
|
||
{
|
||
val = remove_breakpoint (b, mark_uninserted);
|
||
if (val != 0)
|
||
return val;
|
||
}
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
int
|
||
reattach_breakpoints (int pid)
|
||
{
|
||
struct breakpoint *b;
|
||
int val;
|
||
struct cleanup *old_chain = save_inferior_ptid ();
|
||
|
||
/* Set inferior_ptid; remove_breakpoint uses this global. */
|
||
inferior_ptid = pid_to_ptid (pid);
|
||
ALL_BREAKPOINTS (b)
|
||
{
|
||
if (b->inserted)
|
||
{
|
||
remove_breakpoint (b, mark_inserted);
|
||
if (b->type == bp_hardware_breakpoint)
|
||
val = target_insert_hw_breakpoint (b->address, b->shadow_contents);
|
||
else
|
||
val = target_insert_breakpoint (b->address, b->shadow_contents);
|
||
if (val != 0)
|
||
{
|
||
do_cleanups (old_chain);
|
||
return val;
|
||
}
|
||
}
|
||
}
|
||
do_cleanups (old_chain);
|
||
return 0;
|
||
}
|
||
|
||
void
|
||
update_breakpoints_after_exec (void)
|
||
{
|
||
struct breakpoint *b;
|
||
struct breakpoint *temp;
|
||
|
||
/* Doing this first prevents the badness of having delete_breakpoint()
|
||
write a breakpoint's current "shadow contents" to lift the bp. That
|
||
shadow is NOT valid after an exec()! */
|
||
mark_breakpoints_out ();
|
||
|
||
ALL_BREAKPOINTS_SAFE (b, temp)
|
||
{
|
||
/* Solib breakpoints must be explicitly reset after an exec(). */
|
||
if (b->type == bp_shlib_event)
|
||
{
|
||
delete_breakpoint (b);
|
||
continue;
|
||
}
|
||
|
||
/* Thread event breakpoints must be set anew after an exec(),
|
||
as must overlay event breakpoints. */
|
||
if (b->type == bp_thread_event || b->type == bp_overlay_event)
|
||
{
|
||
delete_breakpoint (b);
|
||
continue;
|
||
}
|
||
|
||
/* Step-resume breakpoints are meaningless after an exec(). */
|
||
if (b->type == bp_step_resume)
|
||
{
|
||
delete_breakpoint (b);
|
||
continue;
|
||
}
|
||
|
||
/* Ditto the sigtramp handler breakpoints. */
|
||
if (b->type == bp_through_sigtramp)
|
||
{
|
||
delete_breakpoint (b);
|
||
continue;
|
||
}
|
||
|
||
/* Ditto the exception-handling catchpoints. */
|
||
if ((b->type == bp_catch_catch) || (b->type == bp_catch_throw))
|
||
{
|
||
delete_breakpoint (b);
|
||
continue;
|
||
}
|
||
|
||
/* Don't delete an exec catchpoint, because else the inferior
|
||
won't stop when it ought!
|
||
|
||
Similarly, we probably ought to keep vfork catchpoints, 'cause
|
||
on this target, we may not be able to stop when the vfork is
|
||
seen, but only when the subsequent exec is seen. (And because
|
||
deleting fork catchpoints here but not vfork catchpoints will
|
||
seem mysterious to users, keep those too.)
|
||
|
||
??rehrauer: Let's hope that merely clearing out this catchpoint's
|
||
target address field, if any, is sufficient to have it be reset
|
||
automagically. Certainly on HP-UX that's true.
|
||
|
||
Jim Blandy <jimb@redhat.com>: Actually, zero is a perfectly
|
||
valid code address on some platforms (like the OBSOLETE mn10200
|
||
and mn10300 simulators). We shouldn't assign any special
|
||
interpretation to a breakpoint with a zero address. And in
|
||
fact, GDB doesn't --- I can't see what that comment above is
|
||
talking about. As far as I can tell, setting the address of a
|
||
bp_catch_exec/bp_catch_vfork/bp_catch_fork breakpoint to zero
|
||
is meaningless, since those are implemented with HP-UX kernel
|
||
hackery, not by storing breakpoint instructions somewhere. */
|
||
if ((b->type == bp_catch_exec) ||
|
||
(b->type == bp_catch_vfork) ||
|
||
(b->type == bp_catch_fork))
|
||
{
|
||
b->address = (CORE_ADDR) NULL;
|
||
continue;
|
||
}
|
||
|
||
/* bp_finish is a special case. The only way we ought to be able
|
||
to see one of these when an exec() has happened, is if the user
|
||
caught a vfork, and then said "finish". Ordinarily a finish just
|
||
carries them to the call-site of the current callee, by setting
|
||
a temporary bp there and resuming. But in this case, the finish
|
||
will carry them entirely through the vfork & exec.
|
||
|
||
We don't want to allow a bp_finish to remain inserted now. But
|
||
we can't safely delete it, 'cause finish_command has a handle to
|
||
the bp on a bpstat, and will later want to delete it. There's a
|
||
chance (and I've seen it happen) that if we delete the bp_finish
|
||
here, that its storage will get reused by the time finish_command
|
||
gets 'round to deleting the "use to be a bp_finish" breakpoint.
|
||
We really must allow finish_command to delete a bp_finish.
|
||
|
||
In the absense of a general solution for the "how do we know
|
||
it's safe to delete something others may have handles to?"
|
||
problem, what we'll do here is just uninsert the bp_finish, and
|
||
let finish_command delete it.
|
||
|
||
(We know the bp_finish is "doomed" in the sense that it's
|
||
momentary, and will be deleted as soon as finish_command sees
|
||
the inferior stopped. So it doesn't matter that the bp's
|
||
address is probably bogus in the new a.out, unlike e.g., the
|
||
solib breakpoints.) */
|
||
|
||
if (b->type == bp_finish)
|
||
{
|
||
continue;
|
||
}
|
||
|
||
/* Without a symbolic address, we have little hope of the
|
||
pre-exec() address meaning the same thing in the post-exec()
|
||
a.out. */
|
||
if (b->addr_string == NULL)
|
||
{
|
||
delete_breakpoint (b);
|
||
continue;
|
||
}
|
||
|
||
/* If this breakpoint has survived the above battery of checks, then
|
||
it must have a symbolic address. Be sure that it gets reevaluated
|
||
to a target address, rather than reusing the old evaluation.
|
||
|
||
Jim Blandy <jimb@redhat.com>: As explained above in the comment
|
||
for bp_catch_exec and friends, I'm pretty sure this is entirely
|
||
unnecessary. A call to breakpoint_re_set_one always recomputes
|
||
the breakpoint's address from scratch, or deletes it if it can't.
|
||
So I think this assignment could be deleted without effect. */
|
||
b->address = (CORE_ADDR) NULL;
|
||
}
|
||
/* FIXME what about longjmp breakpoints? Re-create them here? */
|
||
create_overlay_event_breakpoint ("_ovly_debug_event");
|
||
}
|
||
|
||
int
|
||
detach_breakpoints (int pid)
|
||
{
|
||
struct breakpoint *b;
|
||
int val;
|
||
struct cleanup *old_chain = save_inferior_ptid ();
|
||
|
||
if (pid == PIDGET (inferior_ptid))
|
||
error ("Cannot detach breakpoints of inferior_ptid");
|
||
|
||
/* Set inferior_ptid; remove_breakpoint uses this global. */
|
||
inferior_ptid = pid_to_ptid (pid);
|
||
ALL_BREAKPOINTS (b)
|
||
{
|
||
if (b->inserted)
|
||
{
|
||
val = remove_breakpoint (b, mark_inserted);
|
||
if (val != 0)
|
||
{
|
||
do_cleanups (old_chain);
|
||
return val;
|
||
}
|
||
}
|
||
}
|
||
do_cleanups (old_chain);
|
||
return 0;
|
||
}
|
||
|
||
static int
|
||
remove_breakpoint (struct breakpoint *b, insertion_state_t is)
|
||
{
|
||
int val;
|
||
|
||
if (b->enable_state == bp_permanent)
|
||
/* Permanent breakpoints cannot be inserted or removed. */
|
||
return 0;
|
||
|
||
if (b->type == bp_none)
|
||
warning ("attempted to remove apparently deleted breakpoint #%d?",
|
||
b->number);
|
||
|
||
if (b->type != bp_watchpoint
|
||
&& b->type != bp_hardware_watchpoint
|
||
&& b->type != bp_read_watchpoint
|
||
&& b->type != bp_access_watchpoint
|
||
&& b->type != bp_catch_fork
|
||
&& b->type != bp_catch_vfork
|
||
&& b->type != bp_catch_exec
|
||
&& b->type != bp_catch_catch
|
||
&& b->type != bp_catch_throw)
|
||
{
|
||
/* "Normal" instruction breakpoint: either the standard
|
||
trap-instruction bp (bp_breakpoint), or a
|
||
bp_hardware_breakpoint. */
|
||
|
||
/* First check to see if we have to handle an overlay. */
|
||
if (overlay_debugging == ovly_off
|
||
|| b->section == NULL
|
||
|| !(section_is_overlay (b->section)))
|
||
{
|
||
/* No overlay handling: just remove the breakpoint. */
|
||
|
||
if (b->type == bp_hardware_breakpoint)
|
||
val = target_remove_hw_breakpoint (b->address,
|
||
b->shadow_contents);
|
||
else
|
||
val = target_remove_breakpoint (b->address, b->shadow_contents);
|
||
}
|
||
else
|
||
{
|
||
/* This breakpoint is in an overlay section.
|
||
Did we set a breakpoint at the LMA? */
|
||
if (!overlay_events_enabled)
|
||
{
|
||
/* Yes -- overlay event support is not active, so we
|
||
should have set a breakpoint at the LMA. Remove it.
|
||
*/
|
||
CORE_ADDR addr = overlay_unmapped_address (b->address,
|
||
b->section);
|
||
/* Ignore any failures: if the LMA is in ROM, we will
|
||
have already warned when we failed to insert it. */
|
||
if (b->type != bp_hardware_breakpoint)
|
||
target_remove_hw_breakpoint (addr, b->shadow_contents);
|
||
else
|
||
target_remove_breakpoint (addr, b->shadow_contents);
|
||
}
|
||
/* Did we set a breakpoint at the VMA?
|
||
If so, we will have marked the breakpoint 'inserted'. */
|
||
if (b->inserted)
|
||
{
|
||
/* Yes -- remove it. Previously we did not bother to
|
||
remove the breakpoint if the section had been
|
||
unmapped, but let's not rely on that being safe. We
|
||
don't know what the overlay manager might do. */
|
||
if (b->type == bp_hardware_breakpoint)
|
||
val = target_remove_hw_breakpoint (b->address,
|
||
b->shadow_contents);
|
||
else
|
||
val = target_remove_breakpoint (b->address,
|
||
b->shadow_contents);
|
||
}
|
||
else
|
||
{
|
||
/* No -- not inserted, so no need to remove. No error. */
|
||
val = 0;
|
||
}
|
||
}
|
||
if (val)
|
||
return val;
|
||
b->inserted = (is == mark_inserted);
|
||
}
|
||
else if ((b->type == bp_hardware_watchpoint ||
|
||
b->type == bp_read_watchpoint ||
|
||
b->type == bp_access_watchpoint)
|
||
&& b->enable_state == bp_enabled
|
||
&& !b->duplicate)
|
||
{
|
||
struct value *v;
|
||
struct value *n;
|
||
|
||
b->inserted = (is == mark_inserted);
|
||
/* Walk down the saved value chain. */
|
||
for (v = b->val_chain; v; v = v->next)
|
||
{
|
||
/* For each memory reference remove the watchpoint
|
||
at that address. */
|
||
if (VALUE_LVAL (v) == lval_memory
|
||
&& ! VALUE_LAZY (v))
|
||
{
|
||
struct type *vtype = check_typedef (VALUE_TYPE (v));
|
||
|
||
if (v == b->val_chain
|
||
|| (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
|
||
&& TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
|
||
{
|
||
CORE_ADDR addr;
|
||
int len, type;
|
||
|
||
addr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
|
||
len = TYPE_LENGTH (VALUE_TYPE (v));
|
||
type = hw_write;
|
||
if (b->type == bp_read_watchpoint)
|
||
type = hw_read;
|
||
else if (b->type == bp_access_watchpoint)
|
||
type = hw_access;
|
||
|
||
val = target_remove_watchpoint (addr, len, type);
|
||
if (val == -1)
|
||
b->inserted = 1;
|
||
val = 0;
|
||
}
|
||
}
|
||
}
|
||
/* Failure to remove any of the hardware watchpoints comes here. */
|
||
if ((is == mark_uninserted) && (b->inserted))
|
||
warning ("Could not remove hardware watchpoint %d.",
|
||
b->number);
|
||
|
||
/* Free the saved value chain. We will construct a new one
|
||
the next time the watchpoint is inserted. */
|
||
for (v = b->val_chain; v; v = n)
|
||
{
|
||
n = v->next;
|
||
value_free (v);
|
||
}
|
||
b->val_chain = NULL;
|
||
}
|
||
else if ((b->type == bp_catch_fork ||
|
||
b->type == bp_catch_vfork ||
|
||
b->type == bp_catch_exec)
|
||
&& b->enable_state == bp_enabled
|
||
&& !b->duplicate)
|
||
{
|
||
val = -1;
|
||
switch (b->type)
|
||
{
|
||
case bp_catch_fork:
|
||
val = target_remove_fork_catchpoint (PIDGET (inferior_ptid));
|
||
break;
|
||
case bp_catch_vfork:
|
||
val = target_remove_vfork_catchpoint (PIDGET (inferior_ptid));
|
||
break;
|
||
case bp_catch_exec:
|
||
val = target_remove_exec_catchpoint (PIDGET (inferior_ptid));
|
||
break;
|
||
default:
|
||
warning ("Internal error, %s line %d.", __FILE__, __LINE__);
|
||
break;
|
||
}
|
||
if (val)
|
||
return val;
|
||
b->inserted = (is == mark_inserted);
|
||
}
|
||
else if ((b->type == bp_catch_catch ||
|
||
b->type == bp_catch_throw)
|
||
&& b->enable_state == bp_enabled
|
||
&& !b->duplicate)
|
||
{
|
||
|
||
val = target_remove_breakpoint (b->address, b->shadow_contents);
|
||
if (val)
|
||
return val;
|
||
b->inserted = (is == mark_inserted);
|
||
}
|
||
else if (ep_is_exception_catchpoint (b)
|
||
&& b->inserted /* sometimes previous insert doesn't happen */
|
||
&& b->enable_state == bp_enabled
|
||
&& !b->duplicate)
|
||
{
|
||
|
||
val = target_remove_breakpoint (b->address, b->shadow_contents);
|
||
if (val)
|
||
return val;
|
||
|
||
b->inserted = (is == mark_inserted);
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Clear the "inserted" flag in all breakpoints. */
|
||
|
||
void
|
||
mark_breakpoints_out (void)
|
||
{
|
||
struct breakpoint *b;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
b->inserted = 0;
|
||
}
|
||
|
||
/* Clear the "inserted" flag in all breakpoints and delete any
|
||
breakpoints which should go away between runs of the program.
|
||
|
||
Plus other such housekeeping that has to be done for breakpoints
|
||
between runs.
|
||
|
||
Note: this function gets called at the end of a run (by
|
||
generic_mourn_inferior) and when a run begins (by
|
||
init_wait_for_inferior). */
|
||
|
||
|
||
|
||
void
|
||
breakpoint_init_inferior (enum inf_context context)
|
||
{
|
||
struct breakpoint *b, *temp;
|
||
static int warning_needed = 0;
|
||
|
||
ALL_BREAKPOINTS_SAFE (b, temp)
|
||
{
|
||
b->inserted = 0;
|
||
|
||
switch (b->type)
|
||
{
|
||
case bp_call_dummy:
|
||
case bp_watchpoint_scope:
|
||
|
||
/* 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.
|
||
|
||
Also get rid of scope breakpoints. */
|
||
delete_breakpoint (b);
|
||
break;
|
||
|
||
case bp_watchpoint:
|
||
case bp_hardware_watchpoint:
|
||
case bp_read_watchpoint:
|
||
case bp_access_watchpoint:
|
||
|
||
/* Likewise for watchpoints on local expressions. */
|
||
if (b->exp_valid_block != NULL)
|
||
delete_breakpoint (b);
|
||
if (context == inf_starting)
|
||
{
|
||
/* Reset val field to force reread of starting value
|
||
in insert_breakpoints. */
|
||
if (b->val)
|
||
value_free (b->val);
|
||
b->val = NULL;
|
||
}
|
||
break;
|
||
default:
|
||
/* Likewise for exception catchpoints in dynamic-linked
|
||
executables where required */
|
||
if (ep_is_exception_catchpoint (b) &&
|
||
exception_catchpoints_are_fragile)
|
||
{
|
||
warning_needed = 1;
|
||
delete_breakpoint (b);
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (exception_catchpoints_are_fragile)
|
||
exception_support_initialized = 0;
|
||
|
||
/* Don't issue the warning unless it's really needed... */
|
||
if (warning_needed && (context != inf_exited))
|
||
{
|
||
warning ("Exception catchpoints from last run were deleted.");
|
||
warning ("You must reinsert them explicitly.");
|
||
warning_needed = 0;
|
||
}
|
||
}
|
||
|
||
/* breakpoint_here_p (PC) returns non-zero if an enabled breakpoint
|
||
exists at PC. It returns ordinary_breakpoint_here if it's an
|
||
ordinary breakpoint, or permanent_breakpoint_here if it's a
|
||
permanent breakpoint.
|
||
- When continuing from a location with an ordinary breakpoint, we
|
||
actually single step once before calling insert_breakpoints.
|
||
- When continuing from a localion with a permanent breakpoint, we
|
||
need to use the `SKIP_PERMANENT_BREAKPOINT' macro, provided by
|
||
the target, to advance the PC past the breakpoint. */
|
||
|
||
enum breakpoint_here
|
||
breakpoint_here_p (CORE_ADDR pc)
|
||
{
|
||
struct breakpoint *b;
|
||
int any_breakpoint_here = 0;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if ((b->enable_state == bp_enabled
|
||
|| b->enable_state == bp_permanent)
|
||
&& b->address == pc) /* bp is enabled and matches pc */
|
||
{
|
||
if (overlay_debugging
|
||
&& section_is_overlay (b->section)
|
||
&& !section_is_mapped (b->section))
|
||
continue; /* unmapped overlay -- can't be a match */
|
||
else if (b->enable_state == bp_permanent)
|
||
return permanent_breakpoint_here;
|
||
else
|
||
any_breakpoint_here = 1;
|
||
}
|
||
|
||
return any_breakpoint_here ? ordinary_breakpoint_here : 0;
|
||
}
|
||
|
||
|
||
/* breakpoint_inserted_here_p (PC) is just like breakpoint_here_p(),
|
||
but it only returns true if there is actually a breakpoint inserted
|
||
at PC. */
|
||
|
||
int
|
||
breakpoint_inserted_here_p (CORE_ADDR pc)
|
||
{
|
||
struct breakpoint *b;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->inserted
|
||
&& b->address == pc) /* bp is inserted and matches pc */
|
||
{
|
||
if (overlay_debugging
|
||
&& section_is_overlay (b->section)
|
||
&& !section_is_mapped (b->section))
|
||
continue; /* unmapped overlay -- can't be a match */
|
||
else
|
||
return 1;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Return nonzero if FRAME is a dummy frame. We can't use
|
||
DEPRECATED_PC_IN_CALL_DUMMY because figuring out the saved SP would
|
||
take too much time, at least using frame_register() on the 68k.
|
||
This means that for this function to work right a port must use the
|
||
bp_call_dummy breakpoint. */
|
||
|
||
int
|
||
deprecated_frame_in_dummy (struct frame_info *frame)
|
||
{
|
||
struct breakpoint *b;
|
||
|
||
/* This function is used by two files: get_frame_type(), after first
|
||
checking that !DEPRECATED_USE_GENERIC_DUMMY_FRAMES; and
|
||
sparc-tdep.c, which doesn't yet use generic dummy frames anyway. */
|
||
gdb_assert (!DEPRECATED_USE_GENERIC_DUMMY_FRAMES);
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
{
|
||
if (b->type == bp_call_dummy
|
||
&& frame_id_eq (b->frame_id, get_frame_id (frame))
|
||
/* We need to check the PC as well as the frame on the sparc,
|
||
for signals.exp in the testsuite. */
|
||
&& (get_frame_pc (frame)
|
||
>= (b->address
|
||
- DEPRECATED_SIZEOF_CALL_DUMMY_WORDS / sizeof (LONGEST) * DEPRECATED_REGISTER_SIZE))
|
||
&& get_frame_pc (frame) <= b->address)
|
||
return 1;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/* breakpoint_thread_match (PC, PID) returns true if the breakpoint at
|
||
PC is valid for process/thread PID. */
|
||
|
||
int
|
||
breakpoint_thread_match (CORE_ADDR pc, ptid_t ptid)
|
||
{
|
||
struct breakpoint *b;
|
||
int thread;
|
||
|
||
thread = pid_to_thread_id (ptid);
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->enable_state != bp_disabled
|
||
&& b->enable_state != bp_shlib_disabled
|
||
&& b->enable_state != bp_call_disabled
|
||
&& b->address == pc
|
||
&& (b->thread == -1 || b->thread == thread))
|
||
{
|
||
if (overlay_debugging
|
||
&& section_is_overlay (b->section)
|
||
&& !section_is_mapped (b->section))
|
||
continue; /* unmapped overlay -- can't be a match */
|
||
else
|
||
return 1;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* bpstat stuff. External routines' interfaces are documented
|
||
in breakpoint.h. */
|
||
|
||
int
|
||
ep_is_catchpoint (struct breakpoint *ep)
|
||
{
|
||
return
|
||
(ep->type == bp_catch_load)
|
||
|| (ep->type == bp_catch_unload)
|
||
|| (ep->type == bp_catch_fork)
|
||
|| (ep->type == bp_catch_vfork)
|
||
|| (ep->type == bp_catch_exec)
|
||
|| (ep->type == bp_catch_catch)
|
||
|| (ep->type == bp_catch_throw);
|
||
|
||
/* ??rehrauer: Add more kinds here, as are implemented... */
|
||
}
|
||
|
||
int
|
||
ep_is_shlib_catchpoint (struct breakpoint *ep)
|
||
{
|
||
return
|
||
(ep->type == bp_catch_load)
|
||
|| (ep->type == bp_catch_unload);
|
||
}
|
||
|
||
int
|
||
ep_is_exception_catchpoint (struct breakpoint *ep)
|
||
{
|
||
return
|
||
(ep->type == bp_catch_catch)
|
||
|| (ep->type == bp_catch_throw);
|
||
}
|
||
|
||
/* 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 (bpstat *bsp)
|
||
{
|
||
bpstat p;
|
||
bpstat q;
|
||
|
||
if (bsp == 0)
|
||
return;
|
||
p = *bsp;
|
||
while (p != NULL)
|
||
{
|
||
q = p->next;
|
||
if (p->old_val != NULL)
|
||
value_free (p->old_val);
|
||
free_command_lines (&p->commands);
|
||
xfree (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 (bpstat bs)
|
||
{
|
||
bpstat p = NULL;
|
||
bpstat tmp;
|
||
bpstat retval = NULL;
|
||
|
||
if (bs == NULL)
|
||
return bs;
|
||
|
||
for (; bs != NULL; bs = bs->next)
|
||
{
|
||
tmp = (bpstat) xmalloc (sizeof (*tmp));
|
||
memcpy (tmp, bs, sizeof (*tmp));
|
||
if (bs->commands != NULL)
|
||
tmp->commands = copy_command_lines (bs->commands);
|
||
if (bs->old_val != NULL)
|
||
tmp->old_val = value_copy (bs->old_val);
|
||
|
||
if (p == NULL)
|
||
/* This is the first thing in the chain. */
|
||
retval = tmp;
|
||
else
|
||
p->next = tmp;
|
||
p = tmp;
|
||
}
|
||
p->next = NULL;
|
||
return retval;
|
||
}
|
||
|
||
/* Find the bpstat associated with this breakpoint */
|
||
|
||
bpstat
|
||
bpstat_find_breakpoint (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;
|
||
}
|
||
|
||
/* Find a step_resume breakpoint associated with this bpstat.
|
||
(If there are multiple step_resume bp's on the list, this function
|
||
will arbitrarily pick one.)
|
||
|
||
It is an error to use this function if BPSTAT doesn't contain a
|
||
step_resume breakpoint.
|
||
|
||
See wait_for_inferior's use of this function. */
|
||
struct breakpoint *
|
||
bpstat_find_step_resume_breakpoint (bpstat bsp)
|
||
{
|
||
int current_thread;
|
||
|
||
if (bsp == NULL)
|
||
error ("Internal error (bpstat_find_step_resume_breakpoint)");
|
||
|
||
current_thread = pid_to_thread_id (inferior_ptid);
|
||
|
||
for (; bsp != NULL; bsp = bsp->next)
|
||
{
|
||
if ((bsp->breakpoint_at != NULL) &&
|
||
(bsp->breakpoint_at->type == bp_step_resume) &&
|
||
(bsp->breakpoint_at->thread == current_thread ||
|
||
bsp->breakpoint_at->thread == -1))
|
||
return bsp->breakpoint_at;
|
||
}
|
||
|
||
error ("Internal error (no step_resume breakpoint found)");
|
||
}
|
||
|
||
|
||
/* 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 (bpstat *bsp)
|
||
{
|
||
struct breakpoint *b;
|
||
|
||
if ((*bsp) == NULL)
|
||
return 0; /* No more breakpoint values */
|
||
else
|
||
{
|
||
b = (*bsp)->breakpoint_at;
|
||
*bsp = (*bsp)->next;
|
||
if (b == NULL)
|
||
return -1; /* breakpoint that's been deleted since */
|
||
else
|
||
return b->number; /* We have its number */
|
||
}
|
||
}
|
||
|
||
/* Modify BS so that the actions will not be performed. */
|
||
|
||
void
|
||
bpstat_clear_actions (bpstat bs)
|
||
{
|
||
for (; bs != NULL; bs = bs->next)
|
||
{
|
||
free_command_lines (&bs->commands);
|
||
if (bs->old_val != NULL)
|
||
{
|
||
value_free (bs->old_val);
|
||
bs->old_val = NULL;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Stub for cleaning up our state if we error-out of a breakpoint command */
|
||
static void
|
||
cleanup_executing_breakpoints (void *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 (bpstat *bsp)
|
||
{
|
||
bpstat bs;
|
||
struct cleanup *old_chain;
|
||
struct command_line *cmd;
|
||
|
||
/* Avoid endless recursion if a `source' command is contained
|
||
in bs->commands. */
|
||
if (executing_breakpoint_commands)
|
||
return;
|
||
|
||
executing_breakpoint_commands = 1;
|
||
old_chain = make_cleanup (cleanup_executing_breakpoints, 0);
|
||
|
||
top:
|
||
/* Note that (as of this writing), our callers all appear to
|
||
be passing us the address of global stop_bpstat. And, if
|
||
our calls to execute_control_command cause the inferior to
|
||
proceed, that global (and hence, *bsp) will change.
|
||
|
||
We must be careful to not touch *bsp unless the inferior
|
||
has not proceeded. */
|
||
|
||
/* This pointer will iterate over the list of bpstat's. */
|
||
bs = *bsp;
|
||
|
||
breakpoint_proceeded = 0;
|
||
for (; bs != NULL; bs = bs->next)
|
||
{
|
||
cmd = bs->commands;
|
||
while (cmd != NULL)
|
||
{
|
||
execute_control_command (cmd);
|
||
|
||
if (breakpoint_proceeded)
|
||
break;
|
||
else
|
||
cmd = cmd->next;
|
||
}
|
||
if (breakpoint_proceeded)
|
||
/* 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. */
|
||
goto top;
|
||
else
|
||
free_command_lines (&bs->commands);
|
||
}
|
||
do_cleanups (old_chain);
|
||
}
|
||
|
||
/* This is the normal print 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 values.
|
||
|
||
Current scheme: When we stop, bpstat_print() is called. It loops
|
||
through the bpstat list of things causing this stop, calling the
|
||
print_bp_stop_message function on each one. The behavior of the
|
||
print_bp_stop_message function depends on the print_it field of
|
||
bpstat. If such field so indicates, call this function here.
|
||
|
||
Return values from this routine (ultimately used by bpstat_print()
|
||
and normal_stop() to decide what to do):
|
||
PRINT_NOTHING: Means we already printed all we needed to print,
|
||
don't print anything else.
|
||
PRINT_SRC_ONLY: Means we printed something, and we do *not* desire
|
||
that something to be followed by a location.
|
||
PRINT_SCR_AND_LOC: Means we printed something, and we *do* desire
|
||
that something to be followed by a location.
|
||
PRINT_UNKNOWN: Means we printed nothing or we need to do some more
|
||
analysis. */
|
||
|
||
static enum print_stop_action
|
||
print_it_typical (bpstat bs)
|
||
{
|
||
struct cleanup *old_chain, *ui_out_chain;
|
||
struct ui_stream *stb;
|
||
stb = ui_out_stream_new (uiout);
|
||
old_chain = make_cleanup_ui_out_stream_delete (stb);
|
||
/* bs->breakpoint_at can be NULL if it was a momentary breakpoint
|
||
which has since been deleted. */
|
||
if (bs->breakpoint_at == NULL)
|
||
return PRINT_UNKNOWN;
|
||
|
||
switch (bs->breakpoint_at->type)
|
||
{
|
||
case bp_breakpoint:
|
||
case bp_hardware_breakpoint:
|
||
annotate_breakpoint (bs->breakpoint_at->number);
|
||
ui_out_text (uiout, "\nBreakpoint ");
|
||
if (ui_out_is_mi_like_p (uiout))
|
||
ui_out_field_string (uiout, "reason", "breakpoint-hit");
|
||
ui_out_field_int (uiout, "bkptno", bs->breakpoint_at->number);
|
||
ui_out_text (uiout, ", ");
|
||
return PRINT_SRC_AND_LOC;
|
||
break;
|
||
|
||
case bp_shlib_event:
|
||
/* Did we stop because the user set the stop_on_solib_events
|
||
variable? (If so, we report this as a generic, "Stopped due
|
||
to shlib event" message.) */
|
||
printf_filtered ("Stopped due to shared library event\n");
|
||
return PRINT_NOTHING;
|
||
break;
|
||
|
||
case bp_thread_event:
|
||
/* Not sure how we will get here.
|
||
GDB should not stop for these breakpoints. */
|
||
printf_filtered ("Thread Event Breakpoint: gdb should not stop!\n");
|
||
return PRINT_NOTHING;
|
||
break;
|
||
|
||
case bp_overlay_event:
|
||
/* By analogy with the thread event, GDB should not stop for these. */
|
||
printf_filtered ("Overlay Event Breakpoint: gdb should not stop!\n");
|
||
return PRINT_NOTHING;
|
||
break;
|
||
|
||
case bp_catch_load:
|
||
annotate_catchpoint (bs->breakpoint_at->number);
|
||
printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
|
||
printf_filtered ("loaded");
|
||
printf_filtered (" %s), ", bs->breakpoint_at->triggered_dll_pathname);
|
||
return PRINT_SRC_AND_LOC;
|
||
break;
|
||
|
||
case bp_catch_unload:
|
||
annotate_catchpoint (bs->breakpoint_at->number);
|
||
printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
|
||
printf_filtered ("unloaded");
|
||
printf_filtered (" %s), ", bs->breakpoint_at->triggered_dll_pathname);
|
||
return PRINT_SRC_AND_LOC;
|
||
break;
|
||
|
||
case bp_catch_fork:
|
||
annotate_catchpoint (bs->breakpoint_at->number);
|
||
printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
|
||
printf_filtered ("forked");
|
||
printf_filtered (" process %d), ",
|
||
bs->breakpoint_at->forked_inferior_pid);
|
||
return PRINT_SRC_AND_LOC;
|
||
break;
|
||
|
||
case bp_catch_vfork:
|
||
annotate_catchpoint (bs->breakpoint_at->number);
|
||
printf_filtered ("\nCatchpoint %d (", bs->breakpoint_at->number);
|
||
printf_filtered ("vforked");
|
||
printf_filtered (" process %d), ",
|
||
bs->breakpoint_at->forked_inferior_pid);
|
||
return PRINT_SRC_AND_LOC;
|
||
break;
|
||
|
||
case bp_catch_exec:
|
||
annotate_catchpoint (bs->breakpoint_at->number);
|
||
printf_filtered ("\nCatchpoint %d (exec'd %s), ",
|
||
bs->breakpoint_at->number,
|
||
bs->breakpoint_at->exec_pathname);
|
||
return PRINT_SRC_AND_LOC;
|
||
break;
|
||
|
||
case bp_catch_catch:
|
||
if (current_exception_event &&
|
||
(CURRENT_EXCEPTION_KIND == EX_EVENT_CATCH))
|
||
{
|
||
annotate_catchpoint (bs->breakpoint_at->number);
|
||
printf_filtered ("\nCatchpoint %d (exception caught), ",
|
||
bs->breakpoint_at->number);
|
||
printf_filtered ("throw location ");
|
||
if (CURRENT_EXCEPTION_THROW_PC && CURRENT_EXCEPTION_THROW_LINE)
|
||
printf_filtered ("%s:%d",
|
||
CURRENT_EXCEPTION_THROW_FILE,
|
||
CURRENT_EXCEPTION_THROW_LINE);
|
||
else
|
||
printf_filtered ("unknown");
|
||
|
||
printf_filtered (", catch location ");
|
||
if (CURRENT_EXCEPTION_CATCH_PC && CURRENT_EXCEPTION_CATCH_LINE)
|
||
printf_filtered ("%s:%d",
|
||
CURRENT_EXCEPTION_CATCH_FILE,
|
||
CURRENT_EXCEPTION_CATCH_LINE);
|
||
else
|
||
printf_filtered ("unknown");
|
||
|
||
printf_filtered ("\n");
|
||
/* don't bother to print location frame info */
|
||
return PRINT_SRC_ONLY;
|
||
}
|
||
else
|
||
{
|
||
/* really throw, some other bpstat will handle it */
|
||
return PRINT_UNKNOWN;
|
||
}
|
||
break;
|
||
|
||
case bp_catch_throw:
|
||
if (current_exception_event &&
|
||
(CURRENT_EXCEPTION_KIND == EX_EVENT_THROW))
|
||
{
|
||
annotate_catchpoint (bs->breakpoint_at->number);
|
||
printf_filtered ("\nCatchpoint %d (exception thrown), ",
|
||
bs->breakpoint_at->number);
|
||
printf_filtered ("throw location ");
|
||
if (CURRENT_EXCEPTION_THROW_PC && CURRENT_EXCEPTION_THROW_LINE)
|
||
printf_filtered ("%s:%d",
|
||
CURRENT_EXCEPTION_THROW_FILE,
|
||
CURRENT_EXCEPTION_THROW_LINE);
|
||
else
|
||
printf_filtered ("unknown");
|
||
|
||
printf_filtered (", catch location ");
|
||
if (CURRENT_EXCEPTION_CATCH_PC && CURRENT_EXCEPTION_CATCH_LINE)
|
||
printf_filtered ("%s:%d",
|
||
CURRENT_EXCEPTION_CATCH_FILE,
|
||
CURRENT_EXCEPTION_CATCH_LINE);
|
||
else
|
||
printf_filtered ("unknown");
|
||
|
||
printf_filtered ("\n");
|
||
/* don't bother to print location frame info */
|
||
return PRINT_SRC_ONLY;
|
||
}
|
||
else
|
||
{
|
||
/* really catch, some other bpstat will handle it */
|
||
return PRINT_UNKNOWN;
|
||
}
|
||
break;
|
||
|
||
case bp_watchpoint:
|
||
case bp_hardware_watchpoint:
|
||
if (bs->old_val != NULL)
|
||
{
|
||
annotate_watchpoint (bs->breakpoint_at->number);
|
||
if (ui_out_is_mi_like_p (uiout))
|
||
ui_out_field_string (uiout, "reason", "watchpoint-trigger");
|
||
mention (bs->breakpoint_at);
|
||
ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "value");
|
||
ui_out_text (uiout, "\nOld value = ");
|
||
value_print (bs->old_val, stb->stream, 0, Val_pretty_default);
|
||
ui_out_field_stream (uiout, "old", stb);
|
||
ui_out_text (uiout, "\nNew value = ");
|
||
value_print (bs->breakpoint_at->val, stb->stream, 0, Val_pretty_default);
|
||
ui_out_field_stream (uiout, "new", stb);
|
||
do_cleanups (ui_out_chain);
|
||
ui_out_text (uiout, "\n");
|
||
value_free (bs->old_val);
|
||
bs->old_val = NULL;
|
||
}
|
||
/* More than one watchpoint may have been triggered. */
|
||
return PRINT_UNKNOWN;
|
||
break;
|
||
|
||
case bp_read_watchpoint:
|
||
if (ui_out_is_mi_like_p (uiout))
|
||
ui_out_field_string (uiout, "reason", "read-watchpoint-trigger");
|
||
mention (bs->breakpoint_at);
|
||
ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "value");
|
||
ui_out_text (uiout, "\nValue = ");
|
||
value_print (bs->breakpoint_at->val, stb->stream, 0, Val_pretty_default);
|
||
ui_out_field_stream (uiout, "value", stb);
|
||
do_cleanups (ui_out_chain);
|
||
ui_out_text (uiout, "\n");
|
||
return PRINT_UNKNOWN;
|
||
break;
|
||
|
||
case bp_access_watchpoint:
|
||
if (bs->old_val != NULL)
|
||
{
|
||
annotate_watchpoint (bs->breakpoint_at->number);
|
||
if (ui_out_is_mi_like_p (uiout))
|
||
ui_out_field_string (uiout, "reason", "access-watchpoint-trigger");
|
||
mention (bs->breakpoint_at);
|
||
ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "value");
|
||
ui_out_text (uiout, "\nOld value = ");
|
||
value_print (bs->old_val, stb->stream, 0, Val_pretty_default);
|
||
ui_out_field_stream (uiout, "old", stb);
|
||
value_free (bs->old_val);
|
||
bs->old_val = NULL;
|
||
ui_out_text (uiout, "\nNew value = ");
|
||
}
|
||
else
|
||
{
|
||
mention (bs->breakpoint_at);
|
||
if (ui_out_is_mi_like_p (uiout))
|
||
ui_out_field_string (uiout, "reason", "access-watchpoint-trigger");
|
||
ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "value");
|
||
ui_out_text (uiout, "\nValue = ");
|
||
}
|
||
value_print (bs->breakpoint_at->val, stb->stream, 0,Val_pretty_default);
|
||
ui_out_field_stream (uiout, "new", stb);
|
||
do_cleanups (ui_out_chain);
|
||
ui_out_text (uiout, "\n");
|
||
return PRINT_UNKNOWN;
|
||
break;
|
||
|
||
/* Fall through, we don't deal with these types of breakpoints
|
||
here. */
|
||
|
||
case bp_finish:
|
||
if (ui_out_is_mi_like_p (uiout))
|
||
ui_out_field_string (uiout, "reason", "function-finished");
|
||
return PRINT_UNKNOWN;
|
||
break;
|
||
|
||
case bp_until:
|
||
if (ui_out_is_mi_like_p (uiout))
|
||
ui_out_field_string (uiout, "reason", "location-reached");
|
||
return PRINT_UNKNOWN;
|
||
break;
|
||
|
||
case bp_none:
|
||
case bp_longjmp:
|
||
case bp_longjmp_resume:
|
||
case bp_step_resume:
|
||
case bp_through_sigtramp:
|
||
case bp_watchpoint_scope:
|
||
case bp_call_dummy:
|
||
default:
|
||
return PRINT_UNKNOWN;
|
||
}
|
||
}
|
||
|
||
/* Generic routine for printing messages indicating why we
|
||
stopped. The behavior of this function depends on the value
|
||
'print_it' in the bpstat structure. Under some circumstances we
|
||
may decide not to print anything here and delegate the task to
|
||
normal_stop(). */
|
||
|
||
static enum print_stop_action
|
||
print_bp_stop_message (bpstat bs)
|
||
{
|
||
switch (bs->print_it)
|
||
{
|
||
case print_it_noop:
|
||
/* Nothing should be printed for this bpstat entry. */
|
||
return PRINT_UNKNOWN;
|
||
break;
|
||
|
||
case print_it_done:
|
||
/* We still want to print the frame, but we already printed the
|
||
relevant messages. */
|
||
return PRINT_SRC_AND_LOC;
|
||
break;
|
||
|
||
case print_it_normal:
|
||
/* Normal case. Call the breakpoint's print_it method, or
|
||
print_it_typical. */
|
||
if (bs->breakpoint_at != NULL && bs->breakpoint_at->ops != NULL
|
||
&& bs->breakpoint_at->ops->print_it != NULL)
|
||
return bs->breakpoint_at->ops->print_it (bs->breakpoint_at);
|
||
else
|
||
return print_it_typical (bs);
|
||
break;
|
||
|
||
default:
|
||
internal_error (__FILE__, __LINE__,
|
||
"print_bp_stop_message: unrecognized enum value");
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Print a message indicating what happened. This is called from
|
||
normal_stop(). The input to this routine is the head of the bpstat
|
||
list - a list of the eventpoints that caused this stop. This
|
||
routine calls the generic print routine for printing a message
|
||
about reasons for stopping. This will print (for example) the
|
||
"Breakpoint n," part of the output. The return value of this
|
||
routine is one of:
|
||
|
||
PRINT_UNKNOWN: Means we printed nothing
|
||
PRINT_SRC_AND_LOC: Means we printed something, and expect subsequent
|
||
code to print the location. An example is
|
||
"Breakpoint 1, " which should be followed by
|
||
the location.
|
||
PRINT_SRC_ONLY: Means we printed something, but there is no need
|
||
to also print the location part of the message.
|
||
An example is the catch/throw messages, which
|
||
don't require a location appended to the end.
|
||
PRINT_NOTHING: We have done some printing and we don't need any
|
||
further info to be printed.*/
|
||
|
||
enum print_stop_action
|
||
bpstat_print (bpstat bs)
|
||
{
|
||
int 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). */
|
||
for (; bs; bs = bs->next)
|
||
{
|
||
val = print_bp_stop_message (bs);
|
||
if (val == PRINT_SRC_ONLY
|
||
|| val == PRINT_SRC_AND_LOC
|
||
|| val == PRINT_NOTHING)
|
||
return val;
|
||
}
|
||
|
||
/* We reached the end of the chain, or we got a null BS to start
|
||
with and nothing was printed. */
|
||
return PRINT_UNKNOWN;
|
||
}
|
||
|
||
/* 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 (void *exp)
|
||
{
|
||
struct value *mark = value_mark ();
|
||
int i = !value_true (evaluate_expression ((struct expression *) exp));
|
||
value_free_to_mark (mark);
|
||
return i;
|
||
}
|
||
|
||
/* Allocate a new bpstat and chain it to the current one. */
|
||
|
||
static bpstat
|
||
bpstat_alloc (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;
|
||
}
|
||
|
||
/* Possible return values for watchpoint_check (this can't be an enum
|
||
because of check_errors). */
|
||
/* The watchpoint has been deleted. */
|
||
#define WP_DELETED 1
|
||
/* The value has changed. */
|
||
#define WP_VALUE_CHANGED 2
|
||
/* The value has not changed. */
|
||
#define WP_VALUE_NOT_CHANGED 3
|
||
|
||
#define BP_TEMPFLAG 1
|
||
#define BP_HARDWAREFLAG 2
|
||
|
||
/* Check watchpoint condition. */
|
||
|
||
static int
|
||
watchpoint_check (void *p)
|
||
{
|
||
bpstat bs = (bpstat) p;
|
||
struct breakpoint *b;
|
||
struct frame_info *fr;
|
||
int within_current_scope;
|
||
#if 0
|
||
struct frame_id current_frame_id;
|
||
#endif
|
||
|
||
b = bs->breakpoint_at;
|
||
|
||
if (b->exp_valid_block == NULL)
|
||
within_current_scope = 1;
|
||
else
|
||
{
|
||
/* There is no current frame at this moment. If we're going to have
|
||
any chance of handling watchpoints on local variables, we'll need
|
||
the frame chain (so we can determine if we're in scope). */
|
||
reinit_frame_cache ();
|
||
fr = frame_find_by_id (b->watchpoint_frame);
|
||
within_current_scope = (fr != NULL);
|
||
/* in_function_epilogue_p() returns a non-zero value if we're still
|
||
in the function but the stack frame has already been invalidated.
|
||
Since we can't rely on the values of local variables after the
|
||
stack has been destroyed, we are treating the watchpoint in that
|
||
state as `not changed' without further checking.
|
||
|
||
vinschen/2003-09-04: The former implementation left out the case
|
||
that the watchpoint frame couldn't be found by frame_find_by_id()
|
||
because the current PC is currently in an epilogue. Calling
|
||
gdbarch_in_function_epilogue_p() also when fr == NULL fixes that. */
|
||
if ((!within_current_scope || fr == get_current_frame ())
|
||
&& gdbarch_in_function_epilogue_p (current_gdbarch, read_pc ()))
|
||
return WP_VALUE_NOT_CHANGED;
|
||
if (fr && 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);
|
||
}
|
||
|
||
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. */
|
||
|
||
struct value *mark = value_mark ();
|
||
struct value *new_val = evaluate_expression (bs->breakpoint_at->exp);
|
||
if (!value_equal (b->val, new_val))
|
||
{
|
||
release_value (new_val);
|
||
value_free_to_mark (mark);
|
||
bs->old_val = b->val;
|
||
b->val = new_val;
|
||
/* We will stop here */
|
||
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). */
|
||
/* We print all the stop information in print_it_typical(), but
|
||
in this case, by the time we call print_it_typical() this bp
|
||
will be deleted already. So we have no choice but print the
|
||
information here. */
|
||
if (ui_out_is_mi_like_p (uiout))
|
||
ui_out_field_string (uiout, "reason", "watchpoint-scope");
|
||
ui_out_text (uiout, "\nWatchpoint ");
|
||
ui_out_field_int (uiout, "wpnum", bs->breakpoint_at->number);
|
||
ui_out_text (uiout, " deleted because the program has left the block in\n\
|
||
which its expression is valid.\n");
|
||
|
||
if (b->related_breakpoint)
|
||
b->related_breakpoint->disposition = disp_del_at_next_stop;
|
||
b->disposition = disp_del_at_next_stop;
|
||
|
||
return WP_DELETED;
|
||
}
|
||
}
|
||
|
||
/* Get a bpstat associated with having just stopped at address *PC
|
||
and frame address CORE_ADDRESS. Update *PC to point at the
|
||
breakpoint (if we hit a breakpoint). NOT_A_SW_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 (CORE_ADDR *pc, int not_a_sw_breakpoint)
|
||
{
|
||
struct breakpoint *b, *temp;
|
||
CORE_ADDR bp_addr;
|
||
/* True if we've hit a breakpoint (as opposed to a watchpoint). */
|
||
int real_breakpoint = 0;
|
||
/* Root of the chain of bpstat's */
|
||
struct bpstats 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. The
|
||
"not_a_sw_breakpoint" argument is meant to distinguish between a
|
||
breakpoint trap event and a trace/singlestep trap event. For a
|
||
trace/singlestep trap event, we would not want to subtract
|
||
DECR_PC_AFTER_BREAK from the PC. */
|
||
|
||
bp_addr = *pc - (not_a_sw_breakpoint ? 0 : DECR_PC_AFTER_BREAK);
|
||
|
||
ALL_BREAKPOINTS_SAFE (b, temp)
|
||
{
|
||
if (b->enable_state == bp_disabled
|
||
|| b->enable_state == bp_shlib_disabled
|
||
|| b->enable_state == bp_call_disabled)
|
||
continue;
|
||
|
||
if (b->type != bp_watchpoint
|
||
&& b->type != bp_hardware_watchpoint
|
||
&& b->type != bp_read_watchpoint
|
||
&& b->type != bp_access_watchpoint
|
||
&& b->type != bp_hardware_breakpoint
|
||
&& b->type != bp_catch_fork
|
||
&& b->type != bp_catch_vfork
|
||
&& b->type != bp_catch_exec
|
||
&& b->type != bp_catch_catch
|
||
&& b->type != bp_catch_throw) /* a non-watchpoint bp */
|
||
{
|
||
if (b->address != bp_addr) /* address doesn't match */
|
||
continue;
|
||
if (overlay_debugging /* unmapped overlay section */
|
||
&& section_is_overlay (b->section)
|
||
&& !section_is_mapped (b->section))
|
||
continue;
|
||
}
|
||
|
||
if (b->type == bp_hardware_breakpoint)
|
||
{
|
||
if (b->address != (*pc - DECR_PC_AFTER_HW_BREAK))
|
||
continue;
|
||
if (overlay_debugging /* unmapped overlay section */
|
||
&& section_is_overlay (b->section)
|
||
&& !section_is_mapped (b->section))
|
||
continue;
|
||
}
|
||
|
||
/* Is this a catchpoint of a load or unload? If so, did we
|
||
get a load or unload of the specified library? If not,
|
||
ignore it. */
|
||
if ((b->type == bp_catch_load)
|
||
#if defined(SOLIB_HAVE_LOAD_EVENT)
|
||
&& (!SOLIB_HAVE_LOAD_EVENT (PIDGET (inferior_ptid))
|
||
|| ((b->dll_pathname != NULL)
|
||
&& (strcmp (b->dll_pathname,
|
||
SOLIB_LOADED_LIBRARY_PATHNAME (
|
||
PIDGET (inferior_ptid)))
|
||
!= 0)))
|
||
#endif
|
||
)
|
||
continue;
|
||
|
||
if ((b->type == bp_catch_unload)
|
||
#if defined(SOLIB_HAVE_UNLOAD_EVENT)
|
||
&& (!SOLIB_HAVE_UNLOAD_EVENT (PIDGET (inferior_ptid))
|
||
|| ((b->dll_pathname != NULL)
|
||
&& (strcmp (b->dll_pathname,
|
||
SOLIB_UNLOADED_LIBRARY_PATHNAME (
|
||
PIDGET (inferior_ptid)))
|
||
!= 0)))
|
||
#endif
|
||
)
|
||
continue;
|
||
|
||
if ((b->type == bp_catch_fork)
|
||
&& !inferior_has_forked (PIDGET (inferior_ptid),
|
||
&b->forked_inferior_pid))
|
||
continue;
|
||
|
||
if ((b->type == bp_catch_vfork)
|
||
&& !inferior_has_vforked (PIDGET (inferior_ptid),
|
||
&b->forked_inferior_pid))
|
||
continue;
|
||
|
||
if ((b->type == bp_catch_exec)
|
||
&& !inferior_has_execd (PIDGET (inferior_ptid), &b->exec_pathname))
|
||
continue;
|
||
|
||
if (ep_is_exception_catchpoint (b) &&
|
||
!(current_exception_event = target_get_current_exception_event ()))
|
||
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 */
|
||
|
||
/* Watchpoints may change this, if not found to have triggered. */
|
||
bs->stop = 1;
|
||
bs->print = 1;
|
||
|
||
if (b->type == bp_watchpoint ||
|
||
b->type == bp_hardware_watchpoint)
|
||
{
|
||
char *message = xstrprintf ("Error evaluating expression for watchpoint %d\n",
|
||
b->number);
|
||
struct cleanup *cleanups = make_cleanup (xfree, message);
|
||
int e = catch_errors (watchpoint_check, bs, message,
|
||
RETURN_MASK_ALL);
|
||
do_cleanups (cleanups);
|
||
switch (e)
|
||
{
|
||
case WP_DELETED:
|
||
/* We've already printed what needs to be printed. */
|
||
/* Actually this is superfluous, because by the time we
|
||
call print_it_typical() the wp will be already deleted,
|
||
and the function will return immediately. */
|
||
bs->print_it = print_it_done;
|
||
/* Stop. */
|
||
break;
|
||
case WP_VALUE_CHANGED:
|
||
/* Stop. */
|
||
++(b->hit_count);
|
||
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. */
|
||
printf_filtered ("Watchpoint %d deleted.\n", b->number);
|
||
if (b->related_breakpoint)
|
||
b->related_breakpoint->disposition = disp_del_at_next_stop;
|
||
b->disposition = disp_del_at_next_stop;
|
||
/* We've already printed what needs to be printed. */
|
||
bs->print_it = print_it_done;
|
||
|
||
/* Stop. */
|
||
break;
|
||
}
|
||
}
|
||
else if (b->type == bp_read_watchpoint ||
|
||
b->type == bp_access_watchpoint)
|
||
{
|
||
CORE_ADDR addr;
|
||
struct value *v;
|
||
int found = 0;
|
||
|
||
addr = target_stopped_data_address ();
|
||
if (addr == 0)
|
||
continue;
|
||
for (v = b->val_chain; v; v = v->next)
|
||
{
|
||
if (VALUE_LVAL (v) == lval_memory
|
||
&& ! VALUE_LAZY (v))
|
||
{
|
||
struct type *vtype = check_typedef (VALUE_TYPE (v));
|
||
|
||
if (v == b->val_chain
|
||
|| (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
|
||
&& TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
|
||
{
|
||
CORE_ADDR vaddr;
|
||
|
||
vaddr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
|
||
/* Exact match not required. Within range is
|
||
sufficient. */
|
||
if (addr >= vaddr &&
|
||
addr < vaddr + TYPE_LENGTH (VALUE_TYPE (v)))
|
||
found = 1;
|
||
}
|
||
}
|
||
}
|
||
if (found)
|
||
{
|
||
char *message = xstrprintf ("Error evaluating expression for watchpoint %d\n",
|
||
b->number);
|
||
struct cleanup *cleanups = make_cleanup (xfree, message);
|
||
int e = catch_errors (watchpoint_check, bs, message,
|
||
RETURN_MASK_ALL);
|
||
do_cleanups (cleanups);
|
||
switch (e)
|
||
{
|
||
case WP_DELETED:
|
||
/* We've already printed what needs to be printed. */
|
||
bs->print_it = print_it_done;
|
||
/* Stop. */
|
||
break;
|
||
case WP_VALUE_CHANGED:
|
||
if (b->type == bp_read_watchpoint)
|
||
{
|
||
/* Don't stop: read watchpoints shouldn't fire if
|
||
the value has changed. This is for targets
|
||
which cannot set read-only watchpoints. */
|
||
bs->print_it = print_it_noop;
|
||
bs->stop = 0;
|
||
continue;
|
||
}
|
||
++(b->hit_count);
|
||
break;
|
||
case WP_VALUE_NOT_CHANGED:
|
||
/* Stop. */
|
||
++(b->hit_count);
|
||
break;
|
||
default:
|
||
/* Can't happen. */
|
||
case 0:
|
||
/* Error from catch_errors. */
|
||
printf_filtered ("Watchpoint %d deleted.\n", b->number);
|
||
if (b->related_breakpoint)
|
||
b->related_breakpoint->disposition = disp_del_at_next_stop;
|
||
b->disposition = disp_del_at_next_stop;
|
||
/* We've already printed what needs to be printed. */
|
||
bs->print_it = print_it_done;
|
||
break;
|
||
}
|
||
}
|
||
else /* found == 0 */
|
||
{
|
||
/* This is a case where some watchpoint(s) triggered,
|
||
but not at the address of this watchpoint (FOUND
|
||
was left zero). So don't print anything for this
|
||
watchpoint. */
|
||
bs->print_it = print_it_noop;
|
||
bs->stop = 0;
|
||
continue;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/* By definition, an encountered breakpoint is a triggered
|
||
breakpoint. */
|
||
++(b->hit_count);
|
||
|
||
real_breakpoint = 1;
|
||
}
|
||
|
||
if (frame_id_p (b->frame_id)
|
||
&& !frame_id_eq (b->frame_id, get_frame_id (get_current_frame ())))
|
||
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 ());
|
||
value_is_zero
|
||
= catch_errors (breakpoint_cond_eval, (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;
|
||
/* Don't consider this a hit. */
|
||
--(b->hit_count);
|
||
}
|
||
else if (b->ignore_count > 0)
|
||
{
|
||
b->ignore_count--;
|
||
annotate_ignore_count_change ();
|
||
bs->stop = 0;
|
||
}
|
||
else
|
||
{
|
||
/* We will stop here */
|
||
if (b->disposition == disp_disable)
|
||
b->enable_state = bp_disabled;
|
||
if (b->silent)
|
||
bs->print = 0;
|
||
bs->commands = b->commands;
|
||
if (bs->commands &&
|
||
(STREQ ("silent", bs->commands->line) ||
|
||
(xdb_commands && STREQ ("Q", bs->commands->line))))
|
||
{
|
||
bs->commands = bs->commands->next;
|
||
bs->print = 0;
|
||
}
|
||
bs->commands = copy_command_lines (bs->commands);
|
||
}
|
||
}
|
||
/* 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 (real_breakpoint && bs)
|
||
{
|
||
if (bs->breakpoint_at->type == bp_hardware_breakpoint)
|
||
{
|
||
if (DECR_PC_AFTER_HW_BREAK != 0)
|
||
{
|
||
*pc = *pc - DECR_PC_AFTER_HW_BREAK;
|
||
write_pc (*pc);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
if (DECR_PC_AFTER_BREAK != 0 || must_shift_inst_regs)
|
||
{
|
||
*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. */
|
||
}
|
||
}
|
||
}
|
||
|
||
/* The value of a hardware watchpoint hasn't changed, but the
|
||
intermediate memory locations we are watching may have. */
|
||
if (bs && !bs->stop &&
|
||
(bs->breakpoint_at->type == bp_hardware_watchpoint ||
|
||
bs->breakpoint_at->type == bp_read_watchpoint ||
|
||
bs->breakpoint_at->type == bp_access_watchpoint))
|
||
{
|
||
remove_breakpoints ();
|
||
insert_breakpoints ();
|
||
}
|
||
return bs;
|
||
}
|
||
|
||
/* Tell what to do about this bpstat. */
|
||
struct bpstat_what
|
||
bpstat_what (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,
|
||
|
||
/* We hit the step_resume breakpoint. */
|
||
step_resume,
|
||
|
||
/* We hit the through_sigtramp breakpoint. */
|
||
through_sig,
|
||
|
||
/* We hit the shared library event breakpoint. */
|
||
shlib_event,
|
||
|
||
/* We caught a shared library event. */
|
||
catch_shlib_event,
|
||
|
||
/* 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 kc BPSTAT_WHAT_KEEP_CHECKING
|
||
#define ss BPSTAT_WHAT_STOP_SILENT
|
||
#define sn BPSTAT_WHAT_STOP_NOISY
|
||
#define sgl BPSTAT_WHAT_SINGLE
|
||
#define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
|
||
#define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
|
||
#define clrs BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE
|
||
#define sr BPSTAT_WHAT_STEP_RESUME
|
||
#define ts BPSTAT_WHAT_THROUGH_SIGTRAMP
|
||
#define shl BPSTAT_WHAT_CHECK_SHLIBS
|
||
#define shlr BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK
|
||
|
||
/* "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.
|
||
|
||
Another possibly interesting property of this table is that
|
||
there's a partial ordering, priority-like, of the actions. Once
|
||
you've decided that some action is appropriate, you'll never go
|
||
back and decide something of a lower priority is better. The
|
||
ordering is:
|
||
|
||
kc < clr sgl shl shlr slr sn sr ss ts
|
||
sgl < clrs shl shlr slr sn sr ss ts
|
||
slr < err shl shlr sn sr ss ts
|
||
clr < clrs err shl shlr sn sr ss ts
|
||
clrs < err shl shlr sn sr ss ts
|
||
ss < shl shlr sn sr ts
|
||
sn < shl shlr sr ts
|
||
sr < shl shlr ts
|
||
shl < shlr
|
||
ts <
|
||
shlr <
|
||
|
||
What I think this means is that we don't need a damned table
|
||
here. If you just put the rows and columns in the right order,
|
||
it'd look awfully regular. We could simply walk the bpstat list
|
||
and choose the highest priority action we find, with a little
|
||
logic to handle the 'err' cases, and the CLEAR_LONGJMP_RESUME/
|
||
CLEAR_LONGJMP_RESUME_SINGLE distinction (which breakpoint.h says
|
||
is messy anyway). */
|
||
|
||
/* step_resume entries: a step resume breakpoint overrides another
|
||
breakpoint of signal handling (see comment in wait_for_inferior
|
||
at first PC_IN_SIGTRAMP where we set the step_resume breakpoint). */
|
||
/* We handle the through_sigtramp_breakpoint the same way; having both
|
||
one of those and a step_resume_breakpoint is probably very rare (?). */
|
||
|
||
static const enum bpstat_what_main_action
|
||
table[(int) class_last][(int) BPSTAT_WHAT_LAST] =
|
||
{
|
||
/* old action */
|
||
/* kc ss sn sgl slr clr clrs sr ts shl shlr
|
||
*/
|
||
/*no_effect */
|
||
{kc, ss, sn, sgl, slr, clr, clrs, sr, ts, shl, shlr},
|
||
/*wp_silent */
|
||
{ss, ss, sn, ss, ss, ss, ss, sr, ts, shl, shlr},
|
||
/*wp_noisy */
|
||
{sn, sn, sn, sn, sn, sn, sn, sr, ts, shl, shlr},
|
||
/*bp_nostop */
|
||
{sgl, ss, sn, sgl, slr, clrs, clrs, sr, ts, shl, shlr},
|
||
/*bp_silent */
|
||
{ss, ss, sn, ss, ss, ss, ss, sr, ts, shl, shlr},
|
||
/*bp_noisy */
|
||
{sn, sn, sn, sn, sn, sn, sn, sr, ts, shl, shlr},
|
||
/*long_jump */
|
||
{slr, ss, sn, slr, slr, err, err, sr, ts, shl, shlr},
|
||
/*long_resume */
|
||
{clr, ss, sn, clrs, err, err, err, sr, ts, shl, shlr},
|
||
/*step_resume */
|
||
{sr, sr, sr, sr, sr, sr, sr, sr, ts, shl, shlr},
|
||
/*through_sig */
|
||
{ts, ts, ts, ts, ts, ts, ts, ts, ts, shl, shlr},
|
||
/*shlib */
|
||
{shl, shl, shl, shl, shl, shl, shl, shl, ts, shl, shlr},
|
||
/*catch_shlib */
|
||
{shlr, shlr, shlr, shlr, shlr, shlr, shlr, shlr, ts, shlr, shlr}
|
||
};
|
||
|
||
#undef kc
|
||
#undef ss
|
||
#undef sn
|
||
#undef sgl
|
||
#undef slr
|
||
#undef clr
|
||
#undef clrs
|
||
#undef err
|
||
#undef sr
|
||
#undef ts
|
||
#undef shl
|
||
#undef shlr
|
||
enum bpstat_what_main_action current_action = BPSTAT_WHAT_KEEP_CHECKING;
|
||
struct bpstat_what retval;
|
||
|
||
retval.call_dummy = 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_none:
|
||
continue;
|
||
|
||
case bp_breakpoint:
|
||
case bp_hardware_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:
|
||
case bp_hardware_watchpoint:
|
||
case bp_read_watchpoint:
|
||
case bp_access_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 (bs->stop)
|
||
{
|
||
bs_class = step_resume;
|
||
}
|
||
else
|
||
/* It is for the wrong frame. */
|
||
bs_class = bp_nostop;
|
||
break;
|
||
case bp_through_sigtramp:
|
||
bs_class = through_sig;
|
||
break;
|
||
case bp_watchpoint_scope:
|
||
bs_class = bp_nostop;
|
||
break;
|
||
case bp_shlib_event:
|
||
bs_class = shlib_event;
|
||
break;
|
||
case bp_thread_event:
|
||
case bp_overlay_event:
|
||
bs_class = bp_nostop;
|
||
break;
|
||
case bp_catch_load:
|
||
case bp_catch_unload:
|
||
/* Only if this catchpoint triggered should we cause the
|
||
step-out-of-dld behaviour. Otherwise, we ignore this
|
||
catchpoint. */
|
||
if (bs->stop)
|
||
bs_class = catch_shlib_event;
|
||
else
|
||
bs_class = no_effect;
|
||
break;
|
||
case bp_catch_fork:
|
||
case bp_catch_vfork:
|
||
case bp_catch_exec:
|
||
if (bs->stop)
|
||
{
|
||
if (bs->print)
|
||
bs_class = bp_noisy;
|
||
else
|
||
bs_class = bp_silent;
|
||
}
|
||
else
|
||
/* There was a catchpoint, but we're not stopping.
|
||
This requires no further action. */
|
||
bs_class = no_effect;
|
||
break;
|
||
case bp_catch_catch:
|
||
if (!bs->stop || CURRENT_EXCEPTION_KIND != EX_EVENT_CATCH)
|
||
bs_class = bp_nostop;
|
||
else if (bs->stop)
|
||
bs_class = bs->print ? bp_noisy : bp_silent;
|
||
break;
|
||
case bp_catch_throw:
|
||
if (!bs->stop || CURRENT_EXCEPTION_KIND != EX_EVENT_THROW)
|
||
bs_class = bp_nostop;
|
||
else if (bs->stop)
|
||
bs_class = bs->print ? bp_noisy : bp_silent;
|
||
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 (void)
|
||
{
|
||
struct breakpoint *b;
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->enable_state == bp_enabled && b->type == bp_watchpoint)
|
||
return 1;
|
||
return 0;
|
||
}
|
||
|
||
/* Nonzero if there are enabled hardware watchpoints. */
|
||
int
|
||
bpstat_have_active_hw_watchpoints (void)
|
||
{
|
||
struct breakpoint *b;
|
||
ALL_BREAKPOINTS (b)
|
||
if ((b->enable_state == bp_enabled) &&
|
||
(b->inserted) &&
|
||
((b->type == bp_hardware_watchpoint) ||
|
||
(b->type == bp_read_watchpoint) ||
|
||
(b->type == bp_access_watchpoint)))
|
||
return 1;
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* Given a bpstat that records zero or more triggered eventpoints, this
|
||
function returns another bpstat which contains only the catchpoints
|
||
on that first list, if any. */
|
||
void
|
||
bpstat_get_triggered_catchpoints (bpstat ep_list, bpstat *cp_list)
|
||
{
|
||
struct bpstats root_bs[1];
|
||
bpstat bs = root_bs;
|
||
struct breakpoint *ep;
|
||
char *dll_pathname;
|
||
|
||
bpstat_clear (cp_list);
|
||
root_bs->next = NULL;
|
||
|
||
for (; ep_list != NULL; ep_list = ep_list->next)
|
||
{
|
||
/* Is this eventpoint a catchpoint? If not, ignore it. */
|
||
ep = ep_list->breakpoint_at;
|
||
if (ep == NULL)
|
||
break;
|
||
if ((ep->type != bp_catch_load) &&
|
||
(ep->type != bp_catch_unload) &&
|
||
(ep->type != bp_catch_catch) &&
|
||
(ep->type != bp_catch_throw))
|
||
/* pai: (temp) ADD fork/vfork here!! */
|
||
continue;
|
||
|
||
/* Yes; add it to the list. */
|
||
bs = bpstat_alloc (ep, bs);
|
||
*bs = *ep_list;
|
||
bs->next = NULL;
|
||
bs = root_bs->next;
|
||
|
||
#if defined(SOLIB_ADD)
|
||
/* Also, for each triggered catchpoint, tag it with the name of
|
||
the library that caused this trigger. (We copy the name now,
|
||
because it's only guaranteed to be available NOW, when the
|
||
catchpoint triggers. Clients who may wish to know the name
|
||
later must get it from the catchpoint itself.) */
|
||
if (ep->triggered_dll_pathname != NULL)
|
||
xfree (ep->triggered_dll_pathname);
|
||
if (ep->type == bp_catch_load)
|
||
dll_pathname = SOLIB_LOADED_LIBRARY_PATHNAME (
|
||
PIDGET (inferior_ptid));
|
||
else
|
||
dll_pathname = SOLIB_UNLOADED_LIBRARY_PATHNAME (
|
||
PIDGET (inferior_ptid));
|
||
#else
|
||
dll_pathname = NULL;
|
||
#endif
|
||
if (dll_pathname)
|
||
{
|
||
ep->triggered_dll_pathname = (char *)
|
||
xmalloc (strlen (dll_pathname) + 1);
|
||
strcpy (ep->triggered_dll_pathname, dll_pathname);
|
||
}
|
||
else
|
||
ep->triggered_dll_pathname = NULL;
|
||
}
|
||
|
||
*cp_list = bs;
|
||
}
|
||
|
||
/* Print B to gdb_stdout. */
|
||
static void
|
||
print_one_breakpoint (struct breakpoint *b,
|
||
CORE_ADDR *last_addr)
|
||
{
|
||
struct command_line *l;
|
||
struct symbol *sym;
|
||
struct ep_type_description
|
||
{
|
||
enum bptype type;
|
||
char *description;
|
||
};
|
||
static struct ep_type_description bptypes[] =
|
||
{
|
||
{bp_none, "?deleted?"},
|
||
{bp_breakpoint, "breakpoint"},
|
||
{bp_hardware_breakpoint, "hw breakpoint"},
|
||
{bp_until, "until"},
|
||
{bp_finish, "finish"},
|
||
{bp_watchpoint, "watchpoint"},
|
||
{bp_hardware_watchpoint, "hw watchpoint"},
|
||
{bp_read_watchpoint, "read watchpoint"},
|
||
{bp_access_watchpoint, "acc watchpoint"},
|
||
{bp_longjmp, "longjmp"},
|
||
{bp_longjmp_resume, "longjmp resume"},
|
||
{bp_step_resume, "step resume"},
|
||
{bp_through_sigtramp, "sigtramp"},
|
||
{bp_watchpoint_scope, "watchpoint scope"},
|
||
{bp_call_dummy, "call dummy"},
|
||
{bp_shlib_event, "shlib events"},
|
||
{bp_thread_event, "thread events"},
|
||
{bp_overlay_event, "overlay events"},
|
||
{bp_catch_load, "catch load"},
|
||
{bp_catch_unload, "catch unload"},
|
||
{bp_catch_fork, "catch fork"},
|
||
{bp_catch_vfork, "catch vfork"},
|
||
{bp_catch_exec, "catch exec"},
|
||
{bp_catch_catch, "catch catch"},
|
||
{bp_catch_throw, "catch throw"}
|
||
};
|
||
|
||
static char *bpdisps[] =
|
||
{"del", "dstp", "dis", "keep"};
|
||
static char bpenables[] = "nynny";
|
||
char wrap_indent[80];
|
||
struct ui_stream *stb = ui_out_stream_new (uiout);
|
||
struct cleanup *old_chain = make_cleanup_ui_out_stream_delete (stb);
|
||
struct cleanup *bkpt_chain;
|
||
|
||
annotate_record ();
|
||
bkpt_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "bkpt");
|
||
|
||
/* 1 */
|
||
annotate_field (0);
|
||
ui_out_field_int (uiout, "number", b->number);
|
||
|
||
/* 2 */
|
||
annotate_field (1);
|
||
if (((int) b->type > (sizeof (bptypes) / sizeof (bptypes[0])))
|
||
|| ((int) b->type != bptypes[(int) b->type].type))
|
||
internal_error (__FILE__, __LINE__,
|
||
"bptypes table does not describe type #%d.",
|
||
(int) b->type);
|
||
ui_out_field_string (uiout, "type", bptypes[(int) b->type].description);
|
||
|
||
/* 3 */
|
||
annotate_field (2);
|
||
ui_out_field_string (uiout, "disp", bpdisps[(int) b->disposition]);
|
||
|
||
/* 4 */
|
||
annotate_field (3);
|
||
ui_out_field_fmt (uiout, "enabled", "%c", bpenables[(int) b->enable_state]);
|
||
ui_out_spaces (uiout, 2);
|
||
|
||
/* 5 and 6 */
|
||
strcpy (wrap_indent, " ");
|
||
if (addressprint)
|
||
{
|
||
if (TARGET_ADDR_BIT <= 32)
|
||
strcat (wrap_indent, " ");
|
||
else
|
||
strcat (wrap_indent, " ");
|
||
}
|
||
|
||
if (b->ops != NULL && b->ops->print_one != NULL)
|
||
b->ops->print_one (b, last_addr);
|
||
else
|
||
switch (b->type)
|
||
{
|
||
case bp_none:
|
||
internal_error (__FILE__, __LINE__,
|
||
"print_one_breakpoint: bp_none encountered\n");
|
||
break;
|
||
|
||
case bp_watchpoint:
|
||
case bp_hardware_watchpoint:
|
||
case bp_read_watchpoint:
|
||
case bp_access_watchpoint:
|
||
/* Field 4, the address, is omitted (which makes the columns
|
||
not line up too nicely with the headers, but the effect
|
||
is relatively readable). */
|
||
if (addressprint)
|
||
ui_out_field_skip (uiout, "addr");
|
||
annotate_field (5);
|
||
print_expression (b->exp, stb->stream);
|
||
ui_out_field_stream (uiout, "what", stb);
|
||
break;
|
||
|
||
case bp_catch_load:
|
||
case bp_catch_unload:
|
||
/* Field 4, the address, is omitted (which makes the columns
|
||
not line up too nicely with the headers, but the effect
|
||
is relatively readable). */
|
||
if (addressprint)
|
||
ui_out_field_skip (uiout, "addr");
|
||
annotate_field (5);
|
||
if (b->dll_pathname == NULL)
|
||
{
|
||
ui_out_field_string (uiout, "what", "<any library>");
|
||
ui_out_spaces (uiout, 1);
|
||
}
|
||
else
|
||
{
|
||
ui_out_text (uiout, "library \"");
|
||
ui_out_field_string (uiout, "what", b->dll_pathname);
|
||
ui_out_text (uiout, "\" ");
|
||
}
|
||
break;
|
||
|
||
case bp_catch_fork:
|
||
case bp_catch_vfork:
|
||
/* Field 4, the address, is omitted (which makes the columns
|
||
not line up too nicely with the headers, but the effect
|
||
is relatively readable). */
|
||
if (addressprint)
|
||
ui_out_field_skip (uiout, "addr");
|
||
annotate_field (5);
|
||
if (b->forked_inferior_pid != 0)
|
||
{
|
||
ui_out_text (uiout, "process ");
|
||
ui_out_field_int (uiout, "what", b->forked_inferior_pid);
|
||
ui_out_spaces (uiout, 1);
|
||
}
|
||
|
||
case bp_catch_exec:
|
||
/* Field 4, the address, is omitted (which makes the columns
|
||
not line up too nicely with the headers, but the effect
|
||
is relatively readable). */
|
||
if (addressprint)
|
||
ui_out_field_skip (uiout, "addr");
|
||
annotate_field (5);
|
||
if (b->exec_pathname != NULL)
|
||
{
|
||
ui_out_text (uiout, "program \"");
|
||
ui_out_field_string (uiout, "what", b->exec_pathname);
|
||
ui_out_text (uiout, "\" ");
|
||
}
|
||
break;
|
||
|
||
case bp_catch_catch:
|
||
/* Field 4, the address, is omitted (which makes the columns
|
||
not line up too nicely with the headers, but the effect
|
||
is relatively readable). */
|
||
if (addressprint)
|
||
ui_out_field_skip (uiout, "addr");
|
||
annotate_field (5);
|
||
ui_out_field_string (uiout, "what", "exception catch");
|
||
ui_out_spaces (uiout, 1);
|
||
break;
|
||
|
||
case bp_catch_throw:
|
||
/* Field 4, the address, is omitted (which makes the columns
|
||
not line up too nicely with the headers, but the effect
|
||
is relatively readable). */
|
||
if (addressprint)
|
||
ui_out_field_skip (uiout, "addr");
|
||
annotate_field (5);
|
||
ui_out_field_string (uiout, "what", "exception throw");
|
||
ui_out_spaces (uiout, 1);
|
||
break;
|
||
|
||
case bp_breakpoint:
|
||
case bp_hardware_breakpoint:
|
||
case bp_until:
|
||
case bp_finish:
|
||
case bp_longjmp:
|
||
case bp_longjmp_resume:
|
||
case bp_step_resume:
|
||
case bp_through_sigtramp:
|
||
case bp_watchpoint_scope:
|
||
case bp_call_dummy:
|
||
case bp_shlib_event:
|
||
case bp_thread_event:
|
||
case bp_overlay_event:
|
||
if (addressprint)
|
||
{
|
||
annotate_field (4);
|
||
ui_out_field_core_addr (uiout, "addr", b->address);
|
||
}
|
||
annotate_field (5);
|
||
*last_addr = b->address;
|
||
if (b->source_file)
|
||
{
|
||
sym = find_pc_sect_function (b->address, b->section);
|
||
if (sym)
|
||
{
|
||
ui_out_text (uiout, "in ");
|
||
ui_out_field_string (uiout, "func",
|
||
SYMBOL_PRINT_NAME (sym));
|
||
ui_out_wrap_hint (uiout, wrap_indent);
|
||
ui_out_text (uiout, " at ");
|
||
}
|
||
ui_out_field_string (uiout, "file", b->source_file);
|
||
ui_out_text (uiout, ":");
|
||
ui_out_field_int (uiout, "line", b->line_number);
|
||
}
|
||
else
|
||
{
|
||
print_address_symbolic (b->address, stb->stream, demangle, "");
|
||
ui_out_field_stream (uiout, "at", stb);
|
||
}
|
||
break;
|
||
}
|
||
|
||
if (b->thread != -1)
|
||
{
|
||
/* FIXME: This seems to be redundant and lost here; see the
|
||
"stop only in" line a little further down. */
|
||
ui_out_text (uiout, " thread ");
|
||
ui_out_field_int (uiout, "thread", b->thread);
|
||
}
|
||
|
||
ui_out_text (uiout, "\n");
|
||
|
||
if (frame_id_p (b->frame_id))
|
||
{
|
||
annotate_field (6);
|
||
ui_out_text (uiout, "\tstop only in stack frame at ");
|
||
/* FIXME: cagney/2002-12-01: Shouldn't be poeking around inside
|
||
the frame ID. */
|
||
ui_out_field_core_addr (uiout, "frame", b->frame_id.stack_addr);
|
||
ui_out_text (uiout, "\n");
|
||
}
|
||
|
||
if (b->cond)
|
||
{
|
||
annotate_field (7);
|
||
ui_out_text (uiout, "\tstop only if ");
|
||
print_expression (b->cond, stb->stream);
|
||
ui_out_field_stream (uiout, "cond", stb);
|
||
ui_out_text (uiout, "\n");
|
||
}
|
||
|
||
if (b->thread != -1)
|
||
{
|
||
/* FIXME should make an annotation for this */
|
||
ui_out_text (uiout, "\tstop only in thread ");
|
||
ui_out_field_int (uiout, "thread", b->thread);
|
||
ui_out_text (uiout, "\n");
|
||
}
|
||
|
||
if (show_breakpoint_hit_counts && b->hit_count)
|
||
{
|
||
/* FIXME should make an annotation for this */
|
||
if (ep_is_catchpoint (b))
|
||
ui_out_text (uiout, "\tcatchpoint");
|
||
else
|
||
ui_out_text (uiout, "\tbreakpoint");
|
||
ui_out_text (uiout, " already hit ");
|
||
ui_out_field_int (uiout, "times", b->hit_count);
|
||
if (b->hit_count == 1)
|
||
ui_out_text (uiout, " time\n");
|
||
else
|
||
ui_out_text (uiout, " times\n");
|
||
}
|
||
|
||
/* Output the count also if it is zero, but only if this is
|
||
mi. FIXME: Should have a better test for this. */
|
||
if (ui_out_is_mi_like_p (uiout))
|
||
if (show_breakpoint_hit_counts && b->hit_count == 0)
|
||
ui_out_field_int (uiout, "times", b->hit_count);
|
||
|
||
if (b->ignore_count)
|
||
{
|
||
annotate_field (8);
|
||
ui_out_text (uiout, "\tignore next ");
|
||
ui_out_field_int (uiout, "ignore", b->ignore_count);
|
||
ui_out_text (uiout, " hits\n");
|
||
}
|
||
|
||
if ((l = b->commands))
|
||
{
|
||
struct cleanup *script_chain;
|
||
|
||
annotate_field (9);
|
||
script_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "script");
|
||
print_command_lines (uiout, l, 4);
|
||
do_cleanups (script_chain);
|
||
}
|
||
do_cleanups (bkpt_chain);
|
||
do_cleanups (old_chain);
|
||
}
|
||
|
||
struct captured_breakpoint_query_args
|
||
{
|
||
int bnum;
|
||
};
|
||
|
||
static int
|
||
do_captured_breakpoint_query (struct ui_out *uiout, void *data)
|
||
{
|
||
struct captured_breakpoint_query_args *args = data;
|
||
struct breakpoint *b;
|
||
CORE_ADDR dummy_addr = 0;
|
||
ALL_BREAKPOINTS (b)
|
||
{
|
||
if (args->bnum == b->number)
|
||
{
|
||
print_one_breakpoint (b, &dummy_addr);
|
||
return GDB_RC_OK;
|
||
}
|
||
}
|
||
return GDB_RC_NONE;
|
||
}
|
||
|
||
enum gdb_rc
|
||
gdb_breakpoint_query (struct ui_out *uiout, int bnum)
|
||
{
|
||
struct captured_breakpoint_query_args args;
|
||
args.bnum = bnum;
|
||
/* For the moment we don't trust print_one_breakpoint() to not throw
|
||
an error. */
|
||
return catch_exceptions (uiout, do_captured_breakpoint_query, &args,
|
||
NULL, RETURN_MASK_ALL);
|
||
}
|
||
|
||
/* Return non-zero if B is user settable (breakpoints, watchpoints,
|
||
catchpoints, et.al.). */
|
||
|
||
static int
|
||
user_settable_breakpoint (const struct breakpoint *b)
|
||
{
|
||
return (b->type == bp_breakpoint
|
||
|| b->type == bp_catch_load
|
||
|| b->type == bp_catch_unload
|
||
|| b->type == bp_catch_fork
|
||
|| b->type == bp_catch_vfork
|
||
|| b->type == bp_catch_exec
|
||
|| b->type == bp_catch_catch
|
||
|| b->type == bp_catch_throw
|
||
|| b->type == bp_hardware_breakpoint
|
||
|| b->type == bp_watchpoint
|
||
|| b->type == bp_read_watchpoint
|
||
|| b->type == bp_access_watchpoint
|
||
|| b->type == bp_hardware_watchpoint);
|
||
}
|
||
|
||
/* Print information on user settable breakpoint (watchpoint, etc)
|
||
number BNUM. If BNUM is -1 print all user settable breakpoints.
|
||
If ALLFLAG is non-zero, include non- user settable breakpoints. */
|
||
|
||
static void
|
||
breakpoint_1 (int bnum, int allflag)
|
||
{
|
||
struct breakpoint *b;
|
||
CORE_ADDR last_addr = (CORE_ADDR) -1;
|
||
int nr_printable_breakpoints;
|
||
struct cleanup *bkpttbl_chain;
|
||
|
||
/* Compute the number of rows in the table. */
|
||
nr_printable_breakpoints = 0;
|
||
ALL_BREAKPOINTS (b)
|
||
if (bnum == -1
|
||
|| bnum == b->number)
|
||
{
|
||
if (allflag || user_settable_breakpoint (b))
|
||
nr_printable_breakpoints++;
|
||
}
|
||
|
||
if (addressprint)
|
||
bkpttbl_chain
|
||
= make_cleanup_ui_out_table_begin_end (uiout, 6, nr_printable_breakpoints,
|
||
"BreakpointTable");
|
||
else
|
||
bkpttbl_chain
|
||
= make_cleanup_ui_out_table_begin_end (uiout, 5, nr_printable_breakpoints,
|
||
"BreakpointTable");
|
||
|
||
if (nr_printable_breakpoints > 0)
|
||
annotate_breakpoints_headers ();
|
||
if (nr_printable_breakpoints > 0)
|
||
annotate_field (0);
|
||
ui_out_table_header (uiout, 3, ui_left, "number", "Num"); /* 1 */
|
||
if (nr_printable_breakpoints > 0)
|
||
annotate_field (1);
|
||
ui_out_table_header (uiout, 14, ui_left, "type", "Type"); /* 2 */
|
||
if (nr_printable_breakpoints > 0)
|
||
annotate_field (2);
|
||
ui_out_table_header (uiout, 4, ui_left, "disp", "Disp"); /* 3 */
|
||
if (nr_printable_breakpoints > 0)
|
||
annotate_field (3);
|
||
ui_out_table_header (uiout, 3, ui_left, "enabled", "Enb"); /* 4 */
|
||
if (addressprint)
|
||
{
|
||
if (nr_printable_breakpoints > 0)
|
||
annotate_field (4);
|
||
if (TARGET_ADDR_BIT <= 32)
|
||
ui_out_table_header (uiout, 10, ui_left, "addr", "Address");/* 5 */
|
||
else
|
||
ui_out_table_header (uiout, 18, ui_left, "addr", "Address");/* 5 */
|
||
}
|
||
if (nr_printable_breakpoints > 0)
|
||
annotate_field (5);
|
||
ui_out_table_header (uiout, 40, ui_noalign, "what", "What"); /* 6 */
|
||
ui_out_table_body (uiout);
|
||
if (nr_printable_breakpoints > 0)
|
||
annotate_breakpoints_table ();
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (bnum == -1
|
||
|| bnum == b->number)
|
||
{
|
||
/* We only print out user settable breakpoints unless the
|
||
allflag is set. */
|
||
if (allflag || user_settable_breakpoint (b))
|
||
print_one_breakpoint (b, &last_addr);
|
||
}
|
||
|
||
do_cleanups (bkpttbl_chain);
|
||
|
||
if (nr_printable_breakpoints == 0)
|
||
{
|
||
if (bnum == -1)
|
||
ui_out_message (uiout, 0, "No breakpoints or watchpoints.\n");
|
||
else
|
||
ui_out_message (uiout, 0, "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);
|
||
}
|
||
|
||
/* FIXME? Should this be moved up so that it is only called when
|
||
there have been breakpoints? */
|
||
annotate_breakpoints_table_end ();
|
||
}
|
||
|
||
static void
|
||
breakpoints_info (char *bnum_exp, int from_tty)
|
||
{
|
||
int bnum = -1;
|
||
|
||
if (bnum_exp)
|
||
bnum = parse_and_eval_long (bnum_exp);
|
||
|
||
breakpoint_1 (bnum, 0);
|
||
}
|
||
|
||
static void
|
||
maintenance_info_breakpoints (char *bnum_exp, int from_tty)
|
||
{
|
||
int bnum = -1;
|
||
|
||
if (bnum_exp)
|
||
bnum = parse_and_eval_long (bnum_exp);
|
||
|
||
breakpoint_1 (bnum, 1);
|
||
}
|
||
|
||
/* Print a message describing any breakpoints set at PC. */
|
||
|
||
static void
|
||
describe_other_breakpoints (CORE_ADDR pc, asection *section)
|
||
{
|
||
int others = 0;
|
||
struct breakpoint *b;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->address == pc) /* address match / overlay match */
|
||
if (!overlay_debugging || b->section == section)
|
||
others++;
|
||
if (others > 0)
|
||
{
|
||
printf_filtered ("Note: breakpoint%s ", (others > 1) ? "s" : "");
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->address == pc) /* address match / overlay match */
|
||
if (!overlay_debugging || b->section == section)
|
||
{
|
||
others--;
|
||
printf_filtered ("%d%s%s ",
|
||
b->number,
|
||
((b->enable_state == bp_disabled ||
|
||
b->enable_state == bp_shlib_disabled ||
|
||
b->enable_state == bp_call_disabled)
|
||
? " (disabled)"
|
||
: b->enable_state == bp_permanent
|
||
? " (permanent)"
|
||
: ""),
|
||
(others > 1) ? ","
|
||
: ((others == 1) ? " and" : ""));
|
||
}
|
||
printf_filtered ("also set at pc ");
|
||
print_address_numeric (pc, 1, gdb_stdout);
|
||
printf_filtered (".\n");
|
||
}
|
||
}
|
||
|
||
/* Set the default place to put a breakpoint
|
||
for the `break' command with no arguments. */
|
||
|
||
void
|
||
set_default_breakpoint (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;
|
||
}
|
||
|
||
/* Return true iff it is meaningful to use the address member of
|
||
BPT. For some breakpoint types, the address member is irrelevant
|
||
and it makes no sense to attempt to compare it to other addresses
|
||
(or use it for any other purpose either).
|
||
|
||
More specifically, each of the following breakpoint types will always
|
||
have a zero valued address and we don't want check_duplicates() to mark
|
||
breakpoints of any of these types to be a duplicate of an actual
|
||
breakpoint at address zero:
|
||
|
||
bp_watchpoint
|
||
bp_hardware_watchpoint
|
||
bp_read_watchpoint
|
||
bp_access_watchpoint
|
||
bp_catch_exec
|
||
bp_longjmp_resume
|
||
bp_catch_fork
|
||
bp_catch_vork */
|
||
|
||
static int
|
||
breakpoint_address_is_meaningful (struct breakpoint *bpt)
|
||
{
|
||
enum bptype type = bpt->type;
|
||
|
||
return (type != bp_watchpoint
|
||
&& type != bp_hardware_watchpoint
|
||
&& type != bp_read_watchpoint
|
||
&& type != bp_access_watchpoint
|
||
&& type != bp_catch_exec
|
||
&& type != bp_longjmp_resume
|
||
&& type != bp_catch_fork
|
||
&& type != bp_catch_vfork);
|
||
}
|
||
|
||
/* Rescan breakpoints at the same address and section as BPT,
|
||
marking the first one as "first" and any others as "duplicates".
|
||
This is so that the bpt instruction is only inserted once.
|
||
If we have a permanent breakpoint at the same place as BPT, make
|
||
that one the official one, and the rest as duplicates. */
|
||
|
||
static void
|
||
check_duplicates (struct breakpoint *bpt)
|
||
{
|
||
struct breakpoint *b;
|
||
int count = 0;
|
||
struct breakpoint *perm_bp = 0;
|
||
CORE_ADDR address = bpt->address;
|
||
asection *section = bpt->section;
|
||
|
||
if (! breakpoint_address_is_meaningful (bpt))
|
||
return;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->enable_state != bp_disabled
|
||
&& b->enable_state != bp_shlib_disabled
|
||
&& b->enable_state != bp_call_disabled
|
||
&& b->address == address /* address / overlay match */
|
||
&& (!overlay_debugging || b->section == section)
|
||
&& breakpoint_address_is_meaningful (b))
|
||
{
|
||
/* Have we found a permanent breakpoint? */
|
||
if (b->enable_state == bp_permanent)
|
||
{
|
||
perm_bp = b;
|
||
break;
|
||
}
|
||
|
||
count++;
|
||
b->duplicate = count > 1;
|
||
}
|
||
|
||
/* If we found a permanent breakpoint at this address, go over the
|
||
list again and declare all the other breakpoints there to be the
|
||
duplicates. */
|
||
if (perm_bp)
|
||
{
|
||
perm_bp->duplicate = 0;
|
||
|
||
/* Permanent breakpoint should always be inserted. */
|
||
if (! perm_bp->inserted)
|
||
internal_error (__FILE__, __LINE__,
|
||
"allegedly permanent breakpoint is not "
|
||
"actually inserted");
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (b != perm_bp)
|
||
{
|
||
if (b->inserted)
|
||
internal_error (__FILE__, __LINE__,
|
||
"another breakpoint was inserted on top of "
|
||
"a permanent breakpoint");
|
||
|
||
if (b->enable_state != bp_disabled
|
||
&& b->enable_state != bp_shlib_disabled
|
||
&& b->enable_state != bp_call_disabled
|
||
&& b->address == address /* address / overlay match */
|
||
&& (!overlay_debugging || b->section == section)
|
||
&& breakpoint_address_is_meaningful (b))
|
||
b->duplicate = 1;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* set_raw_breakpoint() is a low level routine for allocating and
|
||
partially initializing a breakpoint of type BPTYPE. The newly
|
||
created breakpoint's address, section, source file name, and line
|
||
number are provided by SAL. The newly created and partially
|
||
initialized breakpoint is added to the breakpoint chain and
|
||
is also returned as the value of this function.
|
||
|
||
It is expected that the caller will complete the initialization of
|
||
the newly created breakpoint struct as well as output any status
|
||
information regarding the creation of a new breakpoint. In
|
||
particular, set_raw_breakpoint() does NOT set the breakpoint
|
||
number! Care should be taken to not allow an error() to occur
|
||
prior to completing the initialization of the breakpoint. If this
|
||
should happen, a bogus breakpoint will be left on the chain. */
|
||
|
||
struct breakpoint *
|
||
set_raw_breakpoint (struct symtab_and_line sal, enum bptype bptype)
|
||
{
|
||
struct breakpoint *b, *b1;
|
||
|
||
b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint));
|
||
memset (b, 0, sizeof (*b));
|
||
b->address = sal.pc;
|
||
if (sal.symtab == NULL)
|
||
b->source_file = NULL;
|
||
else
|
||
b->source_file = savestring (sal.symtab->filename,
|
||
strlen (sal.symtab->filename));
|
||
b->section = sal.section;
|
||
b->type = bptype;
|
||
b->language = current_language->la_language;
|
||
b->input_radix = input_radix;
|
||
b->thread = -1;
|
||
b->line_number = sal.line;
|
||
b->enable_state = bp_enabled;
|
||
b->next = 0;
|
||
b->silent = 0;
|
||
b->ignore_count = 0;
|
||
b->commands = NULL;
|
||
b->frame_id = null_frame_id;
|
||
b->dll_pathname = NULL;
|
||
b->triggered_dll_pathname = NULL;
|
||
b->forked_inferior_pid = 0;
|
||
b->exec_pathname = NULL;
|
||
b->ops = NULL;
|
||
|
||
/* Add this breakpoint to the end of the chain
|
||
so that a list of breakpoints will come out in order
|
||
of increasing numbers. */
|
||
|
||
b1 = breakpoint_chain;
|
||
if (b1 == 0)
|
||
breakpoint_chain = b;
|
||
else
|
||
{
|
||
while (b1->next)
|
||
b1 = b1->next;
|
||
b1->next = b;
|
||
}
|
||
|
||
check_duplicates (b);
|
||
breakpoints_changed ();
|
||
|
||
return b;
|
||
}
|
||
|
||
|
||
/* Note that the breakpoint object B describes a permanent breakpoint
|
||
instruction, hard-wired into the inferior's code. */
|
||
void
|
||
make_breakpoint_permanent (struct breakpoint *b)
|
||
{
|
||
b->enable_state = bp_permanent;
|
||
|
||
/* By definition, permanent breakpoints are already present in the code. */
|
||
b->inserted = 1;
|
||
}
|
||
|
||
static struct breakpoint *
|
||
create_internal_breakpoint (CORE_ADDR address, enum bptype type)
|
||
{
|
||
static int internal_breakpoint_number = -1;
|
||
struct symtab_and_line sal;
|
||
struct breakpoint *b;
|
||
|
||
init_sal (&sal); /* initialize to zeroes */
|
||
|
||
sal.pc = address;
|
||
sal.section = find_pc_overlay (sal.pc);
|
||
|
||
b = set_raw_breakpoint (sal, type);
|
||
b->number = internal_breakpoint_number--;
|
||
b->disposition = disp_donttouch;
|
||
|
||
return b;
|
||
}
|
||
|
||
|
||
static void
|
||
create_longjmp_breakpoint (char *func_name)
|
||
{
|
||
struct breakpoint *b;
|
||
struct minimal_symbol *m;
|
||
|
||
if (func_name == NULL)
|
||
b = create_internal_breakpoint (0, bp_longjmp_resume);
|
||
else
|
||
{
|
||
if ((m = lookup_minimal_symbol_text (func_name, NULL, NULL)) == NULL)
|
||
return;
|
||
|
||
b = create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m), bp_longjmp);
|
||
}
|
||
|
||
b->enable_state = bp_disabled;
|
||
b->silent = 1;
|
||
if (func_name)
|
||
b->addr_string = xstrdup (func_name);
|
||
}
|
||
|
||
/* 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 (void)
|
||
{
|
||
struct breakpoint *b;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->type == bp_longjmp)
|
||
{
|
||
b->enable_state = bp_enabled;
|
||
check_duplicates (b);
|
||
}
|
||
}
|
||
|
||
void
|
||
disable_longjmp_breakpoint (void)
|
||
{
|
||
struct breakpoint *b;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->type == bp_longjmp
|
||
|| b->type == bp_longjmp_resume)
|
||
{
|
||
b->enable_state = bp_disabled;
|
||
check_duplicates (b);
|
||
}
|
||
}
|
||
|
||
static void
|
||
create_overlay_event_breakpoint (char *func_name)
|
||
{
|
||
struct breakpoint *b;
|
||
struct minimal_symbol *m;
|
||
|
||
if ((m = lookup_minimal_symbol_text (func_name, NULL, NULL)) == NULL)
|
||
return;
|
||
|
||
b = create_internal_breakpoint (SYMBOL_VALUE_ADDRESS (m),
|
||
bp_overlay_event);
|
||
b->addr_string = xstrdup (func_name);
|
||
|
||
if (overlay_debugging == ovly_auto)
|
||
{
|
||
b->enable_state = bp_enabled;
|
||
overlay_events_enabled = 1;
|
||
}
|
||
else
|
||
{
|
||
b->enable_state = bp_disabled;
|
||
overlay_events_enabled = 0;
|
||
}
|
||
}
|
||
|
||
void
|
||
enable_overlay_breakpoints (void)
|
||
{
|
||
struct breakpoint *b;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->type == bp_overlay_event)
|
||
{
|
||
b->enable_state = bp_enabled;
|
||
check_duplicates (b);
|
||
overlay_events_enabled = 1;
|
||
}
|
||
}
|
||
|
||
void
|
||
disable_overlay_breakpoints (void)
|
||
{
|
||
struct breakpoint *b;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->type == bp_overlay_event)
|
||
{
|
||
b->enable_state = bp_disabled;
|
||
check_duplicates (b);
|
||
overlay_events_enabled = 0;
|
||
}
|
||
}
|
||
|
||
struct breakpoint *
|
||
create_thread_event_breakpoint (CORE_ADDR address)
|
||
{
|
||
struct breakpoint *b;
|
||
|
||
b = create_internal_breakpoint (address, bp_thread_event);
|
||
|
||
b->enable_state = bp_enabled;
|
||
/* addr_string has to be used or breakpoint_re_set will delete me. */
|
||
xasprintf (&b->addr_string, "*0x%s", paddr (b->address));
|
||
|
||
return b;
|
||
}
|
||
|
||
void
|
||
remove_thread_event_breakpoints (void)
|
||
{
|
||
struct breakpoint *b, *temp;
|
||
|
||
ALL_BREAKPOINTS_SAFE (b, temp)
|
||
if (b->type == bp_thread_event)
|
||
delete_breakpoint (b);
|
||
}
|
||
|
||
#ifdef SOLIB_ADD
|
||
void
|
||
remove_solib_event_breakpoints (void)
|
||
{
|
||
struct breakpoint *b, *temp;
|
||
|
||
ALL_BREAKPOINTS_SAFE (b, temp)
|
||
if (b->type == bp_shlib_event)
|
||
delete_breakpoint (b);
|
||
}
|
||
|
||
struct breakpoint *
|
||
create_solib_event_breakpoint (CORE_ADDR address)
|
||
{
|
||
struct breakpoint *b;
|
||
|
||
b = create_internal_breakpoint (address, bp_shlib_event);
|
||
return b;
|
||
}
|
||
|
||
/* Disable any breakpoints that are on code in shared libraries. Only
|
||
apply to enabled breakpoints, disabled ones can just stay disabled. */
|
||
|
||
void
|
||
disable_breakpoints_in_shlibs (int silent)
|
||
{
|
||
struct breakpoint *b;
|
||
int disabled_shlib_breaks = 0;
|
||
|
||
/* See also: insert_breakpoints, under DISABLE_UNSETTABLE_BREAK. */
|
||
ALL_BREAKPOINTS (b)
|
||
{
|
||
#if defined (PC_SOLIB)
|
||
if (((b->type == bp_breakpoint) ||
|
||
(b->type == bp_hardware_breakpoint)) &&
|
||
b->enable_state == bp_enabled &&
|
||
!b->duplicate &&
|
||
PC_SOLIB (b->address))
|
||
{
|
||
b->enable_state = bp_shlib_disabled;
|
||
if (!silent)
|
||
{
|
||
if (!disabled_shlib_breaks)
|
||
{
|
||
target_terminal_ours_for_output ();
|
||
warning ("Temporarily disabling shared library breakpoints:");
|
||
}
|
||
disabled_shlib_breaks = 1;
|
||
warning ("breakpoint #%d ", b->number);
|
||
}
|
||
}
|
||
#endif
|
||
}
|
||
}
|
||
|
||
/* Try to reenable any breakpoints in shared libraries. */
|
||
void
|
||
re_enable_breakpoints_in_shlibs (void)
|
||
{
|
||
struct breakpoint *b;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->enable_state == bp_shlib_disabled)
|
||
{
|
||
char buf[1];
|
||
|
||
/* Do not reenable the breakpoint if the shared library
|
||
is still not mapped in. */
|
||
if (target_read_memory (b->address, buf, 1) == 0)
|
||
b->enable_state = bp_enabled;
|
||
}
|
||
}
|
||
|
||
#endif
|
||
|
||
static void
|
||
solib_load_unload_1 (char *hookname, int tempflag, char *dll_pathname,
|
||
char *cond_string, enum bptype bp_kind)
|
||
{
|
||
struct breakpoint *b;
|
||
struct symtabs_and_lines sals;
|
||
struct cleanup *old_chain;
|
||
struct cleanup *canonical_strings_chain = NULL;
|
||
char *addr_start = hookname;
|
||
char *addr_end = NULL;
|
||
char **canonical = (char **) NULL;
|
||
int thread = -1; /* All threads. */
|
||
|
||
/* Set a breakpoint on the specified hook. */
|
||
sals = decode_line_1 (&hookname, 1, (struct symtab *) NULL, 0, &canonical);
|
||
addr_end = hookname;
|
||
|
||
if (sals.nelts == 0)
|
||
{
|
||
warning ("Unable to set a breakpoint on dynamic linker callback.");
|
||
warning ("Suggest linking with /opt/langtools/lib/end.o.");
|
||
warning ("GDB will be unable to track shl_load/shl_unload calls");
|
||
return;
|
||
}
|
||
if (sals.nelts != 1)
|
||
{
|
||
warning ("Unable to set unique breakpoint on dynamic linker callback.");
|
||
warning ("GDB will be unable to track shl_load/shl_unload calls");
|
||
return;
|
||
}
|
||
|
||
/* Make sure that all storage allocated in decode_line_1 gets freed
|
||
in case the following errors out. */
|
||
old_chain = make_cleanup (xfree, sals.sals);
|
||
if (canonical != (char **) NULL)
|
||
{
|
||
make_cleanup (xfree, canonical);
|
||
canonical_strings_chain = make_cleanup (null_cleanup, 0);
|
||
if (canonical[0] != NULL)
|
||
make_cleanup (xfree, canonical[0]);
|
||
}
|
||
|
||
resolve_sal_pc (&sals.sals[0]);
|
||
|
||
/* Remove the canonical strings from the cleanup, they are needed below. */
|
||
if (canonical != (char **) NULL)
|
||
discard_cleanups (canonical_strings_chain);
|
||
|
||
b = set_raw_breakpoint (sals.sals[0], bp_kind);
|
||
set_breakpoint_count (breakpoint_count + 1);
|
||
b->number = breakpoint_count;
|
||
b->cond = NULL;
|
||
b->cond_string = (cond_string == NULL) ?
|
||
NULL : savestring (cond_string, strlen (cond_string));
|
||
b->thread = thread;
|
||
|
||
if (canonical != (char **) NULL && canonical[0] != NULL)
|
||
b->addr_string = canonical[0];
|
||
else if (addr_start)
|
||
b->addr_string = savestring (addr_start, addr_end - addr_start);
|
||
|
||
b->enable_state = bp_enabled;
|
||
b->disposition = tempflag ? disp_del : disp_donttouch;
|
||
|
||
if (dll_pathname == NULL)
|
||
b->dll_pathname = NULL;
|
||
else
|
||
{
|
||
b->dll_pathname = (char *) xmalloc (strlen (dll_pathname) + 1);
|
||
strcpy (b->dll_pathname, dll_pathname);
|
||
}
|
||
|
||
mention (b);
|
||
do_cleanups (old_chain);
|
||
}
|
||
|
||
void
|
||
create_solib_load_event_breakpoint (char *hookname, int tempflag,
|
||
char *dll_pathname, char *cond_string)
|
||
{
|
||
solib_load_unload_1 (hookname, tempflag, dll_pathname,
|
||
cond_string, bp_catch_load);
|
||
}
|
||
|
||
void
|
||
create_solib_unload_event_breakpoint (char *hookname, int tempflag,
|
||
char *dll_pathname, char *cond_string)
|
||
{
|
||
solib_load_unload_1 (hookname,tempflag, dll_pathname,
|
||
cond_string, bp_catch_unload);
|
||
}
|
||
|
||
static void
|
||
create_fork_vfork_event_catchpoint (int tempflag, char *cond_string,
|
||
enum bptype bp_kind)
|
||
{
|
||
struct symtab_and_line sal;
|
||
struct breakpoint *b;
|
||
int thread = -1; /* All threads. */
|
||
|
||
init_sal (&sal);
|
||
sal.pc = 0;
|
||
sal.symtab = NULL;
|
||
sal.line = 0;
|
||
|
||
b = set_raw_breakpoint (sal, bp_kind);
|
||
set_breakpoint_count (breakpoint_count + 1);
|
||
b->number = breakpoint_count;
|
||
b->cond = NULL;
|
||
b->cond_string = (cond_string == NULL) ?
|
||
NULL : savestring (cond_string, strlen (cond_string));
|
||
b->thread = thread;
|
||
b->addr_string = NULL;
|
||
b->enable_state = bp_enabled;
|
||
b->disposition = tempflag ? disp_del : disp_donttouch;
|
||
b->forked_inferior_pid = 0;
|
||
|
||
mention (b);
|
||
}
|
||
|
||
void
|
||
create_fork_event_catchpoint (int tempflag, char *cond_string)
|
||
{
|
||
create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_fork);
|
||
}
|
||
|
||
void
|
||
create_vfork_event_catchpoint (int tempflag, char *cond_string)
|
||
{
|
||
create_fork_vfork_event_catchpoint (tempflag, cond_string, bp_catch_vfork);
|
||
}
|
||
|
||
void
|
||
create_exec_event_catchpoint (int tempflag, char *cond_string)
|
||
{
|
||
struct symtab_and_line sal;
|
||
struct breakpoint *b;
|
||
int thread = -1; /* All threads. */
|
||
|
||
init_sal (&sal);
|
||
sal.pc = 0;
|
||
sal.symtab = NULL;
|
||
sal.line = 0;
|
||
|
||
b = set_raw_breakpoint (sal, bp_catch_exec);
|
||
set_breakpoint_count (breakpoint_count + 1);
|
||
b->number = breakpoint_count;
|
||
b->cond = NULL;
|
||
b->cond_string = (cond_string == NULL) ?
|
||
NULL : savestring (cond_string, strlen (cond_string));
|
||
b->thread = thread;
|
||
b->addr_string = NULL;
|
||
b->enable_state = bp_enabled;
|
||
b->disposition = tempflag ? disp_del : disp_donttouch;
|
||
|
||
mention (b);
|
||
}
|
||
|
||
static int
|
||
hw_breakpoint_used_count (void)
|
||
{
|
||
struct breakpoint *b;
|
||
int i = 0;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
{
|
||
if (b->type == bp_hardware_breakpoint && b->enable_state == bp_enabled)
|
||
i++;
|
||
}
|
||
|
||
return i;
|
||
}
|
||
|
||
static int
|
||
hw_watchpoint_used_count (enum bptype type, int *other_type_used)
|
||
{
|
||
struct breakpoint *b;
|
||
int i = 0;
|
||
|
||
*other_type_used = 0;
|
||
ALL_BREAKPOINTS (b)
|
||
{
|
||
if (b->enable_state == bp_enabled)
|
||
{
|
||
if (b->type == type)
|
||
i++;
|
||
else if ((b->type == bp_hardware_watchpoint ||
|
||
b->type == bp_read_watchpoint ||
|
||
b->type == bp_access_watchpoint)
|
||
&& b->enable_state == bp_enabled)
|
||
*other_type_used = 1;
|
||
}
|
||
}
|
||
return i;
|
||
}
|
||
|
||
/* 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 (CORE_ADDR pc, struct frame_id frame_id)
|
||
{
|
||
struct breakpoint *b;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->type == bp_longjmp_resume)
|
||
{
|
||
b->address = pc;
|
||
b->enable_state = bp_enabled;
|
||
b->frame_id = frame_id;
|
||
check_duplicates (b);
|
||
return;
|
||
}
|
||
}
|
||
|
||
void
|
||
disable_watchpoints_before_interactive_call_start (void)
|
||
{
|
||
struct breakpoint *b;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
{
|
||
if (((b->type == bp_watchpoint)
|
||
|| (b->type == bp_hardware_watchpoint)
|
||
|| (b->type == bp_read_watchpoint)
|
||
|| (b->type == bp_access_watchpoint)
|
||
|| ep_is_exception_catchpoint (b))
|
||
&& (b->enable_state == bp_enabled))
|
||
{
|
||
b->enable_state = bp_call_disabled;
|
||
check_duplicates (b);
|
||
}
|
||
}
|
||
}
|
||
|
||
void
|
||
enable_watchpoints_after_interactive_call_stop (void)
|
||
{
|
||
struct breakpoint *b;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
{
|
||
if (((b->type == bp_watchpoint)
|
||
|| (b->type == bp_hardware_watchpoint)
|
||
|| (b->type == bp_read_watchpoint)
|
||
|| (b->type == bp_access_watchpoint)
|
||
|| ep_is_exception_catchpoint (b))
|
||
&& (b->enable_state == bp_call_disabled))
|
||
{
|
||
b->enable_state = bp_enabled;
|
||
check_duplicates (b);
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
/* Set a breakpoint that will evaporate an end of command
|
||
at address specified by SAL.
|
||
Restrict it to frame FRAME if FRAME is nonzero. */
|
||
|
||
struct breakpoint *
|
||
set_momentary_breakpoint (struct symtab_and_line sal, struct frame_id frame_id,
|
||
enum bptype type)
|
||
{
|
||
struct breakpoint *b;
|
||
b = set_raw_breakpoint (sal, type);
|
||
b->enable_state = bp_enabled;
|
||
b->disposition = disp_donttouch;
|
||
b->frame_id = frame_id;
|
||
|
||
/* If we're debugging a multi-threaded program, then we
|
||
want momentary breakpoints to be active in only a
|
||
single thread of control. */
|
||
if (in_thread_list (inferior_ptid))
|
||
b->thread = pid_to_thread_id (inferior_ptid);
|
||
|
||
return b;
|
||
}
|
||
|
||
|
||
/* Tell the user we have just set a breakpoint B. */
|
||
|
||
static void
|
||
mention (struct breakpoint *b)
|
||
{
|
||
int say_where = 0;
|
||
struct cleanup *old_chain, *ui_out_chain;
|
||
struct ui_stream *stb;
|
||
|
||
stb = ui_out_stream_new (uiout);
|
||
old_chain = make_cleanup_ui_out_stream_delete (stb);
|
||
|
||
/* FIXME: This is misplaced; mention() is called by things (like hitting a
|
||
watchpoint) other than breakpoint creation. It should be possible to
|
||
clean this up and at the same time replace the random calls to
|
||
breakpoint_changed with this hook, as has already been done for
|
||
delete_breakpoint_hook and so on. */
|
||
if (create_breakpoint_hook)
|
||
create_breakpoint_hook (b);
|
||
breakpoint_create_event (b->number);
|
||
|
||
if (b->ops != NULL && b->ops->print_mention != NULL)
|
||
b->ops->print_mention (b);
|
||
else
|
||
switch (b->type)
|
||
{
|
||
case bp_none:
|
||
printf_filtered ("(apparently deleted?) Eventpoint %d: ", b->number);
|
||
break;
|
||
case bp_watchpoint:
|
||
ui_out_text (uiout, "Watchpoint ");
|
||
ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "wpt");
|
||
ui_out_field_int (uiout, "number", b->number);
|
||
ui_out_text (uiout, ": ");
|
||
print_expression (b->exp, stb->stream);
|
||
ui_out_field_stream (uiout, "exp", stb);
|
||
do_cleanups (ui_out_chain);
|
||
break;
|
||
case bp_hardware_watchpoint:
|
||
ui_out_text (uiout, "Hardware watchpoint ");
|
||
ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "wpt");
|
||
ui_out_field_int (uiout, "number", b->number);
|
||
ui_out_text (uiout, ": ");
|
||
print_expression (b->exp, stb->stream);
|
||
ui_out_field_stream (uiout, "exp", stb);
|
||
do_cleanups (ui_out_chain);
|
||
break;
|
||
case bp_read_watchpoint:
|
||
ui_out_text (uiout, "Hardware read watchpoint ");
|
||
ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "hw-rwpt");
|
||
ui_out_field_int (uiout, "number", b->number);
|
||
ui_out_text (uiout, ": ");
|
||
print_expression (b->exp, stb->stream);
|
||
ui_out_field_stream (uiout, "exp", stb);
|
||
do_cleanups (ui_out_chain);
|
||
break;
|
||
case bp_access_watchpoint:
|
||
ui_out_text (uiout, "Hardware access (read/write) watchpoint ");
|
||
ui_out_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "hw-awpt");
|
||
ui_out_field_int (uiout, "number", b->number);
|
||
ui_out_text (uiout, ": ");
|
||
print_expression (b->exp, stb->stream);
|
||
ui_out_field_stream (uiout, "exp", stb);
|
||
do_cleanups (ui_out_chain);
|
||
break;
|
||
case bp_breakpoint:
|
||
if (ui_out_is_mi_like_p (uiout))
|
||
{
|
||
say_where = 0;
|
||
break;
|
||
}
|
||
printf_filtered ("Breakpoint %d", b->number);
|
||
say_where = 1;
|
||
break;
|
||
case bp_hardware_breakpoint:
|
||
if (ui_out_is_mi_like_p (uiout))
|
||
{
|
||
say_where = 0;
|
||
break;
|
||
}
|
||
printf_filtered ("Hardware assisted breakpoint %d", b->number);
|
||
say_where = 1;
|
||
break;
|
||
case bp_catch_load:
|
||
case bp_catch_unload:
|
||
printf_filtered ("Catchpoint %d (%s %s)",
|
||
b->number,
|
||
(b->type == bp_catch_load) ? "load" : "unload",
|
||
(b->dll_pathname != NULL) ?
|
||
b->dll_pathname : "<any library>");
|
||
break;
|
||
case bp_catch_fork:
|
||
case bp_catch_vfork:
|
||
printf_filtered ("Catchpoint %d (%s)",
|
||
b->number,
|
||
(b->type == bp_catch_fork) ? "fork" : "vfork");
|
||
break;
|
||
case bp_catch_exec:
|
||
printf_filtered ("Catchpoint %d (exec)",
|
||
b->number);
|
||
break;
|
||
case bp_catch_catch:
|
||
case bp_catch_throw:
|
||
printf_filtered ("Catchpoint %d (%s)",
|
||
b->number,
|
||
(b->type == bp_catch_catch) ? "catch" : "throw");
|
||
break;
|
||
|
||
case bp_until:
|
||
case bp_finish:
|
||
case bp_longjmp:
|
||
case bp_longjmp_resume:
|
||
case bp_step_resume:
|
||
case bp_through_sigtramp:
|
||
case bp_call_dummy:
|
||
case bp_watchpoint_scope:
|
||
case bp_shlib_event:
|
||
case bp_thread_event:
|
||
case bp_overlay_event:
|
||
break;
|
||
}
|
||
|
||
if (say_where)
|
||
{
|
||
if (addressprint || b->source_file == NULL)
|
||
{
|
||
printf_filtered (" at ");
|
||
print_address_numeric (b->address, 1, gdb_stdout);
|
||
}
|
||
if (b->source_file)
|
||
printf_filtered (": file %s, line %d.",
|
||
b->source_file, b->line_number);
|
||
}
|
||
do_cleanups (old_chain);
|
||
if (ui_out_is_mi_like_p (uiout))
|
||
return;
|
||
printf_filtered ("\n");
|
||
}
|
||
|
||
|
||
/* Add SALS.nelts breakpoints to the breakpoint table. For each
|
||
SALS.sal[i] breakpoint, include the corresponding ADDR_STRING[i],
|
||
COND[i] and COND_STRING[i] values.
|
||
|
||
NOTE: If the function succeeds, the caller is expected to cleanup
|
||
the arrays ADDR_STRING, COND_STRING, COND and SALS (but not the
|
||
array contents). If the function fails (error() is called), the
|
||
caller is expected to cleanups both the ADDR_STRING, COND_STRING,
|
||
COND and SALS arrays and each of those arrays contents. */
|
||
|
||
static void
|
||
create_breakpoints (struct symtabs_and_lines sals, char **addr_string,
|
||
struct expression **cond, char **cond_string,
|
||
enum bptype type, enum bpdisp disposition,
|
||
int thread, int ignore_count, int from_tty)
|
||
{
|
||
if (type == bp_hardware_breakpoint)
|
||
{
|
||
int i = hw_breakpoint_used_count ();
|
||
int target_resources_ok =
|
||
TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint,
|
||
i + sals.nelts, 0);
|
||
if (target_resources_ok == 0)
|
||
error ("No hardware breakpoint support in the target.");
|
||
else if (target_resources_ok < 0)
|
||
error ("Hardware breakpoints used exceeds limit.");
|
||
}
|
||
|
||
/* Now set all the breakpoints. */
|
||
{
|
||
int i;
|
||
for (i = 0; i < sals.nelts; i++)
|
||
{
|
||
struct breakpoint *b;
|
||
struct symtab_and_line sal = sals.sals[i];
|
||
|
||
if (from_tty)
|
||
describe_other_breakpoints (sal.pc, sal.section);
|
||
|
||
b = set_raw_breakpoint (sal, type);
|
||
set_breakpoint_count (breakpoint_count + 1);
|
||
b->number = breakpoint_count;
|
||
b->cond = cond[i];
|
||
b->thread = thread;
|
||
if (addr_string[i])
|
||
b->addr_string = addr_string[i];
|
||
else
|
||
/* addr_string has to be used or breakpoint_re_set will delete
|
||
me. */
|
||
xasprintf (&b->addr_string, "*0x%s", paddr (b->address));
|
||
b->cond_string = cond_string[i];
|
||
b->ignore_count = ignore_count;
|
||
b->enable_state = bp_enabled;
|
||
b->disposition = disposition;
|
||
mention (b);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Parse ARG which is assumed to be a SAL specification possibly
|
||
followed by conditionals. On return, SALS contains an array of SAL
|
||
addresses found. ADDR_STRING contains a vector of (canonical)
|
||
address strings. ARG points to the end of the SAL. */
|
||
|
||
static void
|
||
parse_breakpoint_sals (char **address,
|
||
struct symtabs_and_lines *sals,
|
||
char ***addr_string)
|
||
{
|
||
char *addr_start = *address;
|
||
*addr_string = NULL;
|
||
/* If no arg given, or if first arg is 'if ', use the default
|
||
breakpoint. */
|
||
if ((*address) == NULL
|
||
|| (strncmp ((*address), "if", 2) == 0 && isspace ((*address)[2])))
|
||
{
|
||
if (default_breakpoint_valid)
|
||
{
|
||
struct symtab_and_line sal;
|
||
init_sal (&sal); /* initialize to zeroes */
|
||
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;
|
||
sal.section = find_pc_overlay (sal.pc);
|
||
sals->sals[0] = sal;
|
||
sals->nelts = 1;
|
||
}
|
||
else
|
||
error ("No default breakpoint address now.");
|
||
}
|
||
else
|
||
{
|
||
/* Force almost all breakpoints to be in terms of the
|
||
current_source_symtab (which is decode_line_1's default). This
|
||
should produce the results we want almost all of the time while
|
||
leaving default_breakpoint_* alone.
|
||
ObjC: However, don't match an Objective-C method name which
|
||
may have a '+' or '-' succeeded by a '[' */
|
||
|
||
struct symtab_and_line cursal = get_current_source_symtab_and_line ();
|
||
|
||
if (default_breakpoint_valid
|
||
&& (!cursal.symtab
|
||
|| ((strchr ("+-", (*address)[0]) != NULL)
|
||
&& ((*address)[1] != '['))))
|
||
*sals = decode_line_1 (address, 1, default_breakpoint_symtab,
|
||
default_breakpoint_line, addr_string);
|
||
else
|
||
*sals = decode_line_1 (address, 1, (struct symtab *) NULL, 0, addr_string);
|
||
}
|
||
/* For any SAL that didn't have a canonical string, fill one in. */
|
||
if (sals->nelts > 0 && *addr_string == NULL)
|
||
*addr_string = xcalloc (sals->nelts, sizeof (char **));
|
||
if (addr_start != (*address))
|
||
{
|
||
int i;
|
||
for (i = 0; i < sals->nelts; i++)
|
||
{
|
||
/* Add the string if not present. */
|
||
if ((*addr_string)[i] == NULL)
|
||
(*addr_string)[i] = savestring (addr_start, (*address) - addr_start);
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
/* Convert each SAL into a real PC. Verify that the PC can be
|
||
inserted as a breakpoint. If it can't throw an error. */
|
||
|
||
static void
|
||
breakpoint_sals_to_pc (struct symtabs_and_lines *sals,
|
||
char *address)
|
||
{
|
||
int i;
|
||
for (i = 0; i < sals->nelts; i++)
|
||
{
|
||
resolve_sal_pc (&sals->sals[i]);
|
||
|
||
/* It's possible for the PC to be nonzero, but still an illegal
|
||
value on some targets.
|
||
|
||
For example, on HP-UX if you start gdb, and before running the
|
||
inferior you try to set a breakpoint on a shared library function
|
||
"foo" where the inferior doesn't call "foo" directly but does
|
||
pass its address to another function call, then we do find a
|
||
minimal symbol for the "foo", but it's address is invalid.
|
||
(Appears to be an index into a table that the loader sets up
|
||
when the inferior is run.)
|
||
|
||
Give the target a chance to bless sals.sals[i].pc before we
|
||
try to make a breakpoint for it. */
|
||
if (PC_REQUIRES_RUN_BEFORE_USE (sals->sals[i].pc))
|
||
{
|
||
if (address == NULL)
|
||
error ("Cannot break without a running program.");
|
||
else
|
||
error ("Cannot break on %s without a running program.",
|
||
address);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Set a breakpoint according to ARG (function, linenum or *address)
|
||
flag: first bit : 0 non-temporary, 1 temporary.
|
||
second bit : 0 normal breakpoint, 1 hardware breakpoint. */
|
||
|
||
static void
|
||
break_command_1 (char *arg, int flag, int from_tty)
|
||
{
|
||
int tempflag, hardwareflag;
|
||
struct symtabs_and_lines sals;
|
||
struct expression **cond = 0;
|
||
/* Pointers in arg to the start, and one past the end, of the
|
||
condition. */
|
||
char **cond_string = (char **) NULL;
|
||
char *addr_start = arg;
|
||
char **addr_string;
|
||
struct cleanup *old_chain;
|
||
struct cleanup *breakpoint_chain = NULL;
|
||
int i;
|
||
int thread = -1;
|
||
int ignore_count = 0;
|
||
|
||
hardwareflag = flag & BP_HARDWAREFLAG;
|
||
tempflag = flag & BP_TEMPFLAG;
|
||
|
||
sals.sals = NULL;
|
||
sals.nelts = 0;
|
||
addr_string = NULL;
|
||
parse_breakpoint_sals (&arg, &sals, &addr_string);
|
||
|
||
if (!sals.nelts)
|
||
return;
|
||
|
||
/* Create a chain of things that always need to be cleaned up. */
|
||
old_chain = make_cleanup (null_cleanup, 0);
|
||
|
||
/* Make sure that all storage allocated to SALS gets freed. */
|
||
make_cleanup (xfree, sals.sals);
|
||
|
||
/* Cleanup the addr_string array but not its contents. */
|
||
make_cleanup (xfree, addr_string);
|
||
|
||
/* Allocate space for all the cond expressions. */
|
||
cond = xcalloc (sals.nelts, sizeof (struct expression *));
|
||
make_cleanup (xfree, cond);
|
||
|
||
/* Allocate space for all the cond strings. */
|
||
cond_string = xcalloc (sals.nelts, sizeof (char **));
|
||
make_cleanup (xfree, cond_string);
|
||
|
||
/* ----------------------------- SNIP -----------------------------
|
||
Anything added to the cleanup chain beyond this point is assumed
|
||
to be part of a breakpoint. If the breakpoint create succeeds
|
||
then the memory is not reclaimed. */
|
||
breakpoint_chain = make_cleanup (null_cleanup, 0);
|
||
|
||
/* Mark the contents of the addr_string for cleanup. These go on
|
||
the breakpoint_chain and only occure if the breakpoint create
|
||
fails. */
|
||
for (i = 0; i < sals.nelts; i++)
|
||
{
|
||
if (addr_string[i] != NULL)
|
||
make_cleanup (xfree, addr_string[i]);
|
||
}
|
||
|
||
/* Resolve all line numbers to PC's and verify that the addresses
|
||
are ok for the target. */
|
||
breakpoint_sals_to_pc (&sals, addr_start);
|
||
|
||
/* Verify that condition can be parsed, before setting any
|
||
breakpoints. Allocate a separate condition expression for each
|
||
breakpoint. */
|
||
thread = -1; /* No specific thread yet */
|
||
for (i = 0; i < sals.nelts; i++)
|
||
{
|
||
char *tok = arg;
|
||
while (tok && *tok)
|
||
{
|
||
char *end_tok;
|
||
int toklen;
|
||
char *cond_start = NULL;
|
||
char *cond_end = NULL;
|
||
while (*tok == ' ' || *tok == '\t')
|
||
tok++;
|
||
|
||
end_tok = tok;
|
||
|
||
while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000')
|
||
end_tok++;
|
||
|
||
toklen = end_tok - tok;
|
||
|
||
if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
|
||
{
|
||
tok = cond_start = end_tok + 1;
|
||
cond[i] = parse_exp_1 (&tok, block_for_pc (sals.sals[i].pc), 0);
|
||
make_cleanup (xfree, cond[i]);
|
||
cond_end = tok;
|
||
cond_string[i] = savestring (cond_start, cond_end - cond_start);
|
||
make_cleanup (xfree, cond_string[i]);
|
||
}
|
||
else if (toklen >= 1 && strncmp (tok, "thread", toklen) == 0)
|
||
{
|
||
char *tmptok;
|
||
|
||
tok = end_tok + 1;
|
||
tmptok = tok;
|
||
thread = strtol (tok, &tok, 0);
|
||
if (tok == tmptok)
|
||
error ("Junk after thread keyword.");
|
||
if (!valid_thread_id (thread))
|
||
error ("Unknown thread %d\n", thread);
|
||
}
|
||
else
|
||
error ("Junk at end of arguments.");
|
||
}
|
||
}
|
||
|
||
create_breakpoints (sals, addr_string, cond, cond_string,
|
||
hardwareflag ? bp_hardware_breakpoint : bp_breakpoint,
|
||
tempflag ? disp_del : disp_donttouch,
|
||
thread, ignore_count, from_tty);
|
||
|
||
if (sals.nelts > 1)
|
||
{
|
||
warning ("Multiple breakpoints were set.");
|
||
warning ("Use the \"delete\" command to delete unwanted breakpoints.");
|
||
}
|
||
/* That's it. Discard the cleanups for data inserted into the
|
||
breakpoint. */
|
||
discard_cleanups (breakpoint_chain);
|
||
/* But cleanup everything else. */
|
||
do_cleanups (old_chain);
|
||
}
|
||
|
||
/* Set a breakpoint of TYPE/DISPOSITION according to ARG (function,
|
||
linenum or *address) with COND and IGNORE_COUNT. */
|
||
|
||
struct captured_breakpoint_args
|
||
{
|
||
char *address;
|
||
char *condition;
|
||
int hardwareflag;
|
||
int tempflag;
|
||
int thread;
|
||
int ignore_count;
|
||
};
|
||
|
||
static int
|
||
do_captured_breakpoint (void *data)
|
||
{
|
||
struct captured_breakpoint_args *args = data;
|
||
struct symtabs_and_lines sals;
|
||
struct expression **cond;
|
||
struct cleanup *old_chain;
|
||
struct cleanup *breakpoint_chain = NULL;
|
||
int i;
|
||
char **addr_string;
|
||
char **cond_string;
|
||
|
||
char *address_end;
|
||
|
||
/* Parse the source and lines spec. Delay check that the expression
|
||
didn't contain trailing garbage until after cleanups are in
|
||
place. */
|
||
sals.sals = NULL;
|
||
sals.nelts = 0;
|
||
address_end = args->address;
|
||
addr_string = NULL;
|
||
parse_breakpoint_sals (&address_end, &sals, &addr_string);
|
||
|
||
if (!sals.nelts)
|
||
return GDB_RC_NONE;
|
||
|
||
/* Create a chain of things at always need to be cleaned up. */
|
||
old_chain = make_cleanup (null_cleanup, 0);
|
||
|
||
/* Always have a addr_string array, even if it is empty. */
|
||
make_cleanup (xfree, addr_string);
|
||
|
||
/* Make sure that all storage allocated to SALS gets freed. */
|
||
make_cleanup (xfree, sals.sals);
|
||
|
||
/* Allocate space for all the cond expressions. */
|
||
cond = xcalloc (sals.nelts, sizeof (struct expression *));
|
||
make_cleanup (xfree, cond);
|
||
|
||
/* Allocate space for all the cond strings. */
|
||
cond_string = xcalloc (sals.nelts, sizeof (char **));
|
||
make_cleanup (xfree, cond_string);
|
||
|
||
/* ----------------------------- SNIP -----------------------------
|
||
Anything added to the cleanup chain beyond this point is assumed
|
||
to be part of a breakpoint. If the breakpoint create goes
|
||
through then that memory is not cleaned up. */
|
||
breakpoint_chain = make_cleanup (null_cleanup, 0);
|
||
|
||
/* Mark the contents of the addr_string for cleanup. These go on
|
||
the breakpoint_chain and only occure if the breakpoint create
|
||
fails. */
|
||
for (i = 0; i < sals.nelts; i++)
|
||
{
|
||
if (addr_string[i] != NULL)
|
||
make_cleanup (xfree, addr_string[i]);
|
||
}
|
||
|
||
/* Wait until now before checking for garbage at the end of the
|
||
address. That way cleanups can take care of freeing any
|
||
memory. */
|
||
if (*address_end != '\0')
|
||
error ("Garbage %s following breakpoint address", address_end);
|
||
|
||
/* Resolve all line numbers to PC's. */
|
||
breakpoint_sals_to_pc (&sals, args->address);
|
||
|
||
/* Verify that conditions can be parsed, before setting any
|
||
breakpoints. */
|
||
for (i = 0; i < sals.nelts; i++)
|
||
{
|
||
if (args->condition != NULL)
|
||
{
|
||
char *tok = args->condition;
|
||
cond[i] = parse_exp_1 (&tok, block_for_pc (sals.sals[i].pc), 0);
|
||
if (*tok != '\0')
|
||
error ("Garbage %s follows condition", tok);
|
||
make_cleanup (xfree, cond[i]);
|
||
cond_string[i] = xstrdup (args->condition);
|
||
}
|
||
}
|
||
|
||
create_breakpoints (sals, addr_string, cond, cond_string,
|
||
args->hardwareflag ? bp_hardware_breakpoint : bp_breakpoint,
|
||
args->tempflag ? disp_del : disp_donttouch,
|
||
args->thread, args->ignore_count, 0/*from-tty*/);
|
||
|
||
/* That's it. Discard the cleanups for data inserted into the
|
||
breakpoint. */
|
||
discard_cleanups (breakpoint_chain);
|
||
/* But cleanup everything else. */
|
||
do_cleanups (old_chain);
|
||
return GDB_RC_OK;
|
||
}
|
||
|
||
enum gdb_rc
|
||
gdb_breakpoint (char *address, char *condition,
|
||
int hardwareflag, int tempflag,
|
||
int thread, int ignore_count)
|
||
{
|
||
struct captured_breakpoint_args args;
|
||
args.address = address;
|
||
args.condition = condition;
|
||
args.hardwareflag = hardwareflag;
|
||
args.tempflag = tempflag;
|
||
args.thread = thread;
|
||
args.ignore_count = ignore_count;
|
||
return catch_errors (do_captured_breakpoint, &args,
|
||
NULL, RETURN_MASK_ALL);
|
||
}
|
||
|
||
|
||
static void
|
||
break_at_finish_at_depth_command_1 (char *arg, int flag, int from_tty)
|
||
{
|
||
struct frame_info *frame;
|
||
CORE_ADDR low, high, selected_pc = 0;
|
||
char *extra_args = NULL;
|
||
char *level_arg;
|
||
int extra_args_len = 0, if_arg = 0;
|
||
|
||
if (!arg ||
|
||
(arg[0] == 'i' && arg[1] == 'f' && (arg[2] == ' ' || arg[2] == '\t')))
|
||
{
|
||
|
||
if (default_breakpoint_valid)
|
||
{
|
||
if (deprecated_selected_frame)
|
||
{
|
||
selected_pc = get_frame_pc (deprecated_selected_frame);
|
||
if (arg)
|
||
if_arg = 1;
|
||
}
|
||
else
|
||
error ("No selected frame.");
|
||
}
|
||
else
|
||
error ("No default breakpoint address now.");
|
||
}
|
||
else
|
||
{
|
||
extra_args = strchr (arg, ' ');
|
||
if (extra_args)
|
||
{
|
||
extra_args++;
|
||
extra_args_len = strlen (extra_args);
|
||
level_arg = (char *) xmalloc (extra_args - arg);
|
||
strncpy (level_arg, arg, extra_args - arg - 1);
|
||
level_arg[extra_args - arg - 1] = '\0';
|
||
}
|
||
else
|
||
{
|
||
level_arg = (char *) xmalloc (strlen (arg) + 1);
|
||
strcpy (level_arg, arg);
|
||
}
|
||
|
||
frame = parse_frame_specification (level_arg);
|
||
if (frame)
|
||
selected_pc = get_frame_pc (frame);
|
||
else
|
||
selected_pc = 0;
|
||
}
|
||
if (if_arg)
|
||
{
|
||
extra_args = arg;
|
||
extra_args_len = strlen (arg);
|
||
}
|
||
|
||
if (selected_pc)
|
||
{
|
||
if (find_pc_partial_function (selected_pc, (char **) NULL, &low, &high))
|
||
{
|
||
char *addr_string;
|
||
if (extra_args_len)
|
||
addr_string = xstrprintf ("*0x%s %s", paddr_nz (high), extra_args);
|
||
else
|
||
addr_string = xstrprintf ("*0x%s", paddr_nz (high));
|
||
break_command_1 (addr_string, flag, from_tty);
|
||
xfree (addr_string);
|
||
}
|
||
else
|
||
error ("No function contains the specified address");
|
||
}
|
||
else
|
||
error ("Unable to set breakpoint at procedure exit");
|
||
}
|
||
|
||
|
||
static void
|
||
break_at_finish_command_1 (char *arg, int flag, int from_tty)
|
||
{
|
||
char *addr_string, *break_string, *beg_addr_string;
|
||
CORE_ADDR low, high;
|
||
struct symtabs_and_lines sals;
|
||
struct symtab_and_line sal;
|
||
struct cleanup *old_chain;
|
||
char *extra_args = NULL;
|
||
int extra_args_len = 0;
|
||
int i, if_arg = 0;
|
||
|
||
if (!arg ||
|
||
(arg[0] == 'i' && arg[1] == 'f' && (arg[2] == ' ' || arg[2] == '\t')))
|
||
{
|
||
if (default_breakpoint_valid)
|
||
{
|
||
if (deprecated_selected_frame)
|
||
{
|
||
addr_string = xstrprintf ("*0x%s",
|
||
paddr_nz (get_frame_pc (deprecated_selected_frame)));
|
||
if (arg)
|
||
if_arg = 1;
|
||
}
|
||
else
|
||
error ("No selected frame.");
|
||
}
|
||
else
|
||
error ("No default breakpoint address now.");
|
||
}
|
||
else
|
||
{
|
||
addr_string = (char *) xmalloc (strlen (arg) + 1);
|
||
strcpy (addr_string, arg);
|
||
}
|
||
|
||
if (if_arg)
|
||
{
|
||
extra_args = arg;
|
||
extra_args_len = strlen (arg);
|
||
}
|
||
else if (arg)
|
||
{
|
||
/* get the stuff after the function name or address */
|
||
extra_args = strchr (arg, ' ');
|
||
if (extra_args)
|
||
{
|
||
extra_args++;
|
||
extra_args_len = strlen (extra_args);
|
||
}
|
||
}
|
||
|
||
sals.sals = NULL;
|
||
sals.nelts = 0;
|
||
|
||
beg_addr_string = addr_string;
|
||
sals = decode_line_1 (&addr_string, 1, (struct symtab *) NULL, 0,
|
||
(char ***) NULL);
|
||
|
||
xfree (beg_addr_string);
|
||
old_chain = make_cleanup (xfree, sals.sals);
|
||
for (i = 0; (i < sals.nelts); i++)
|
||
{
|
||
sal = sals.sals[i];
|
||
if (find_pc_partial_function (sal.pc, (char **) NULL, &low, &high))
|
||
{
|
||
break_string;
|
||
if (extra_args_len)
|
||
break_string = xstrprintf ("*0x%s %s", paddr_nz (high),
|
||
extra_args);
|
||
else
|
||
break_string = xstrprintf ("*0x%s", paddr_nz (high));
|
||
break_command_1 (break_string, flag, from_tty);
|
||
xfree (break_string);
|
||
}
|
||
else
|
||
error ("No function contains the specified address");
|
||
}
|
||
if (sals.nelts > 1)
|
||
{
|
||
warning ("Multiple breakpoints were set.\n");
|
||
warning ("Use the \"delete\" command to delete unwanted breakpoints.");
|
||
}
|
||
do_cleanups (old_chain);
|
||
}
|
||
|
||
|
||
/* Helper function for break_command_1 and disassemble_command. */
|
||
|
||
void
|
||
resolve_sal_pc (struct symtab_and_line *sal)
|
||
{
|
||
CORE_ADDR pc;
|
||
|
||
if (sal->pc == 0 && sal->symtab != NULL)
|
||
{
|
||
if (!find_line_pc (sal->symtab, sal->line, &pc))
|
||
error ("No line %d in file \"%s\".",
|
||
sal->line, sal->symtab->filename);
|
||
sal->pc = pc;
|
||
}
|
||
|
||
if (sal->section == 0 && sal->symtab != NULL)
|
||
{
|
||
struct blockvector *bv;
|
||
struct block *b;
|
||
struct symbol *sym;
|
||
int index;
|
||
|
||
bv = blockvector_for_pc_sect (sal->pc, 0, &index, sal->symtab);
|
||
if (bv != NULL)
|
||
{
|
||
b = BLOCKVECTOR_BLOCK (bv, index);
|
||
sym = block_function (b);
|
||
if (sym != NULL)
|
||
{
|
||
fixup_symbol_section (sym, sal->symtab->objfile);
|
||
sal->section = SYMBOL_BFD_SECTION (sym);
|
||
}
|
||
else
|
||
{
|
||
/* It really is worthwhile to have the section, so we'll just
|
||
have to look harder. This case can be executed if we have
|
||
line numbers but no functions (as can happen in assembly
|
||
source). */
|
||
|
||
struct minimal_symbol *msym;
|
||
|
||
msym = lookup_minimal_symbol_by_pc (sal->pc);
|
||
if (msym)
|
||
sal->section = SYMBOL_BFD_SECTION (msym);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
void
|
||
break_command (char *arg, int from_tty)
|
||
{
|
||
break_command_1 (arg, 0, from_tty);
|
||
}
|
||
|
||
void
|
||
break_at_finish_command (char *arg, int from_tty)
|
||
{
|
||
break_at_finish_command_1 (arg, 0, from_tty);
|
||
}
|
||
|
||
void
|
||
break_at_finish_at_depth_command (char *arg, int from_tty)
|
||
{
|
||
break_at_finish_at_depth_command_1 (arg, 0, from_tty);
|
||
}
|
||
|
||
void
|
||
tbreak_command (char *arg, int from_tty)
|
||
{
|
||
break_command_1 (arg, BP_TEMPFLAG, from_tty);
|
||
}
|
||
|
||
void
|
||
tbreak_at_finish_command (char *arg, int from_tty)
|
||
{
|
||
break_at_finish_command_1 (arg, BP_TEMPFLAG, from_tty);
|
||
}
|
||
|
||
static void
|
||
hbreak_command (char *arg, int from_tty)
|
||
{
|
||
break_command_1 (arg, BP_HARDWAREFLAG, from_tty);
|
||
}
|
||
|
||
static void
|
||
thbreak_command (char *arg, int from_tty)
|
||
{
|
||
break_command_1 (arg, (BP_TEMPFLAG | BP_HARDWAREFLAG), from_tty);
|
||
}
|
||
|
||
static void
|
||
stop_command (char *arg, int from_tty)
|
||
{
|
||
printf_filtered ("Specify the type of breakpoint to set.\n\
|
||
Usage: stop in <function | address>\n\
|
||
stop at <line>\n");
|
||
}
|
||
|
||
static void
|
||
stopin_command (char *arg, int from_tty)
|
||
{
|
||
int badInput = 0;
|
||
|
||
if (arg == (char *) NULL)
|
||
badInput = 1;
|
||
else if (*arg != '*')
|
||
{
|
||
char *argptr = arg;
|
||
int hasColon = 0;
|
||
|
||
/* look for a ':'. If this is a line number specification, then
|
||
say it is bad, otherwise, it should be an address or
|
||
function/method name */
|
||
while (*argptr && !hasColon)
|
||
{
|
||
hasColon = (*argptr == ':');
|
||
argptr++;
|
||
}
|
||
|
||
if (hasColon)
|
||
badInput = (*argptr != ':'); /* Not a class::method */
|
||
else
|
||
badInput = isdigit (*arg); /* a simple line number */
|
||
}
|
||
|
||
if (badInput)
|
||
printf_filtered ("Usage: stop in <function | address>\n");
|
||
else
|
||
break_command_1 (arg, 0, from_tty);
|
||
}
|
||
|
||
static void
|
||
stopat_command (char *arg, int from_tty)
|
||
{
|
||
int badInput = 0;
|
||
|
||
if (arg == (char *) NULL || *arg == '*') /* no line number */
|
||
badInput = 1;
|
||
else
|
||
{
|
||
char *argptr = arg;
|
||
int hasColon = 0;
|
||
|
||
/* look for a ':'. If there is a '::' then get out, otherwise
|
||
it is probably a line number. */
|
||
while (*argptr && !hasColon)
|
||
{
|
||
hasColon = (*argptr == ':');
|
||
argptr++;
|
||
}
|
||
|
||
if (hasColon)
|
||
badInput = (*argptr == ':'); /* we have class::method */
|
||
else
|
||
badInput = !isdigit (*arg); /* not a line number */
|
||
}
|
||
|
||
if (badInput)
|
||
printf_filtered ("Usage: stop at <line>\n");
|
||
else
|
||
break_command_1 (arg, 0, from_tty);
|
||
}
|
||
|
||
/* accessflag: hw_write: watch write,
|
||
hw_read: watch read,
|
||
hw_access: watch access (read or write) */
|
||
static void
|
||
watch_command_1 (char *arg, int accessflag, int from_tty)
|
||
{
|
||
struct breakpoint *b;
|
||
struct symtab_and_line sal;
|
||
struct expression *exp;
|
||
struct block *exp_valid_block;
|
||
struct value *val, *mark;
|
||
struct frame_info *frame;
|
||
struct frame_info *prev_frame = NULL;
|
||
char *exp_start = NULL;
|
||
char *exp_end = NULL;
|
||
char *tok, *end_tok;
|
||
int toklen;
|
||
char *cond_start = NULL;
|
||
char *cond_end = NULL;
|
||
struct expression *cond = NULL;
|
||
int i, other_type_used, target_resources_ok = 0;
|
||
enum bptype bp_type;
|
||
int mem_cnt = 0;
|
||
|
||
init_sal (&sal); /* initialize to zeroes */
|
||
|
||
/* Parse arguments. */
|
||
innermost_block = NULL;
|
||
exp_start = arg;
|
||
exp = parse_exp_1 (&arg, 0, 0);
|
||
exp_end = arg;
|
||
exp_valid_block = innermost_block;
|
||
mark = value_mark ();
|
||
val = evaluate_expression (exp);
|
||
release_value (val);
|
||
if (VALUE_LAZY (val))
|
||
value_fetch_lazy (val);
|
||
|
||
tok = arg;
|
||
while (*tok == ' ' || *tok == '\t')
|
||
tok++;
|
||
end_tok = tok;
|
||
|
||
while (*end_tok != ' ' && *end_tok != '\t' && *end_tok != '\000')
|
||
end_tok++;
|
||
|
||
toklen = end_tok - tok;
|
||
if (toklen >= 1 && strncmp (tok, "if", toklen) == 0)
|
||
{
|
||
tok = cond_start = end_tok + 1;
|
||
cond = parse_exp_1 (&tok, 0, 0);
|
||
cond_end = tok;
|
||
}
|
||
if (*tok)
|
||
error ("Junk at end of command.");
|
||
|
||
if (accessflag == hw_read)
|
||
bp_type = bp_read_watchpoint;
|
||
else if (accessflag == hw_access)
|
||
bp_type = bp_access_watchpoint;
|
||
else
|
||
bp_type = bp_hardware_watchpoint;
|
||
|
||
mem_cnt = can_use_hardware_watchpoint (val);
|
||
if (mem_cnt == 0 && bp_type != bp_hardware_watchpoint)
|
||
error ("Expression cannot be implemented with read/access watchpoint.");
|
||
if (mem_cnt != 0)
|
||
{
|
||
i = hw_watchpoint_used_count (bp_type, &other_type_used);
|
||
target_resources_ok =
|
||
TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_type, i + mem_cnt,
|
||
other_type_used);
|
||
if (target_resources_ok == 0 && bp_type != bp_hardware_watchpoint)
|
||
error ("Target does not support this type of hardware watchpoint.");
|
||
|
||
if (target_resources_ok < 0 && bp_type != bp_hardware_watchpoint)
|
||
error ("Target can only support one kind of HW watchpoint at a time.");
|
||
}
|
||
|
||
#if defined(HPUXHPPA)
|
||
/* On HP-UX if you set a h/w
|
||
watchpoint before the "run" command, the inferior dies with a e.g.,
|
||
SIGILL once you start it. I initially believed this was due to a
|
||
bad interaction between page protection traps and the initial
|
||
startup sequence by the dynamic linker.
|
||
|
||
However, I tried avoiding that by having HP-UX's implementation of
|
||
TARGET_CAN_USE_HW_WATCHPOINT return FALSE if there was no inferior_ptid
|
||
yet, which forced slow watches before a "run" or "attach", and it
|
||
still fails somewhere in the startup code.
|
||
|
||
Until I figure out what's happening, I'm disallowing watches altogether
|
||
before the "run" or "attach" command. We'll tell the user they must
|
||
set watches after getting the program started. */
|
||
if (!target_has_execution)
|
||
{
|
||
warning ("can't do that without a running program; try \"break main\", \"run\" first");
|
||
return;
|
||
}
|
||
#endif /* HPUXHPPA */
|
||
|
||
/* Change the type of breakpoint to an ordinary watchpoint if a hardware
|
||
watchpoint could not be set. */
|
||
if (!mem_cnt || target_resources_ok <= 0)
|
||
bp_type = bp_watchpoint;
|
||
|
||
/* Now set up the breakpoint. */
|
||
b = set_raw_breakpoint (sal, bp_type);
|
||
set_breakpoint_count (breakpoint_count + 1);
|
||
b->number = breakpoint_count;
|
||
b->disposition = disp_donttouch;
|
||
b->exp = exp;
|
||
b->exp_valid_block = exp_valid_block;
|
||
b->exp_string = savestring (exp_start, exp_end - exp_start);
|
||
b->val = val;
|
||
b->cond = cond;
|
||
if (cond_start)
|
||
b->cond_string = savestring (cond_start, cond_end - cond_start);
|
||
else
|
||
b->cond_string = 0;
|
||
|
||
frame = block_innermost_frame (exp_valid_block);
|
||
if (frame)
|
||
{
|
||
prev_frame = get_prev_frame (frame);
|
||
b->watchpoint_frame = get_frame_id (frame);
|
||
}
|
||
else
|
||
{
|
||
memset (&b->watchpoint_frame, 0, sizeof (b->watchpoint_frame));
|
||
}
|
||
|
||
/* If the expression is "local", then set up a "watchpoint scope"
|
||
breakpoint at the point where we've left the scope of the watchpoint
|
||
expression. */
|
||
if (innermost_block)
|
||
{
|
||
if (prev_frame)
|
||
{
|
||
struct breakpoint *scope_breakpoint;
|
||
scope_breakpoint = create_internal_breakpoint (get_frame_pc (prev_frame),
|
||
bp_watchpoint_scope);
|
||
|
||
scope_breakpoint->enable_state = bp_enabled;
|
||
|
||
/* Automatically delete the breakpoint when it hits. */
|
||
scope_breakpoint->disposition = disp_del;
|
||
|
||
/* Only break in the proper frame (help with recursion). */
|
||
scope_breakpoint->frame_id = get_frame_id (prev_frame);
|
||
|
||
/* Set the address at which we will stop. */
|
||
scope_breakpoint->address = get_frame_pc (prev_frame);
|
||
|
||
/* The scope breakpoint is related to the watchpoint. We
|
||
will need to act on them together. */
|
||
b->related_breakpoint = scope_breakpoint;
|
||
}
|
||
}
|
||
value_free_to_mark (mark);
|
||
mention (b);
|
||
}
|
||
|
||
/* Return count of locations need to be watched and can be handled
|
||
in hardware. If the watchpoint can not be handled
|
||
in hardware return zero. */
|
||
|
||
#if !defined(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT)
|
||
#define TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(BYTE_SIZE) \
|
||
((BYTE_SIZE) <= (DEPRECATED_REGISTER_SIZE))
|
||
#endif
|
||
|
||
#if !defined(TARGET_REGION_OK_FOR_HW_WATCHPOINT)
|
||
#define TARGET_REGION_OK_FOR_HW_WATCHPOINT(ADDR,LEN) \
|
||
(TARGET_REGION_SIZE_OK_FOR_HW_WATCHPOINT(LEN))
|
||
#endif
|
||
|
||
static int
|
||
can_use_hardware_watchpoint (struct value *v)
|
||
{
|
||
int found_memory_cnt = 0;
|
||
struct value *head = v;
|
||
|
||
/* Did the user specifically forbid us to use hardware watchpoints? */
|
||
if (!can_use_hw_watchpoints)
|
||
return 0;
|
||
|
||
/* Make sure that the value of the expression depends only upon
|
||
memory contents, and values computed from them within GDB. If we
|
||
find any register references or function calls, we can't use a
|
||
hardware watchpoint.
|
||
|
||
The idea here is that evaluating an expression generates a series
|
||
of values, one holding the value of every subexpression. (The
|
||
expression a*b+c has five subexpressions: a, b, a*b, c, and
|
||
a*b+c.) GDB's values hold almost enough information to establish
|
||
the criteria given above --- they identify memory lvalues,
|
||
register lvalues, computed values, etcetera. So we can evaluate
|
||
the expression, and then scan the chain of values that leaves
|
||
behind to decide whether we can detect any possible change to the
|
||
expression's final value using only hardware watchpoints.
|
||
|
||
However, I don't think that the values returned by inferior
|
||
function calls are special in any way. So this function may not
|
||
notice that an expression involving an inferior function call
|
||
can't be watched with hardware watchpoints. FIXME. */
|
||
for (; v; v = v->next)
|
||
{
|
||
if (VALUE_LVAL (v) == lval_memory)
|
||
{
|
||
if (VALUE_LAZY (v))
|
||
/* A lazy memory lvalue is one that GDB never needed to fetch;
|
||
we either just used its address (e.g., `a' in `a.b') or
|
||
we never needed it at all (e.g., `a' in `a,b'). */
|
||
;
|
||
else
|
||
{
|
||
/* Ahh, memory we actually used! Check if we can cover
|
||
it with hardware watchpoints. */
|
||
struct type *vtype = check_typedef (VALUE_TYPE (v));
|
||
|
||
/* We only watch structs and arrays if user asked for it
|
||
explicitly, never if they just happen to appear in a
|
||
middle of some value chain. */
|
||
if (v == head
|
||
|| (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
|
||
&& TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
|
||
{
|
||
CORE_ADDR vaddr = VALUE_ADDRESS (v) + VALUE_OFFSET (v);
|
||
int len = TYPE_LENGTH (VALUE_TYPE (v));
|
||
|
||
if (!TARGET_REGION_OK_FOR_HW_WATCHPOINT (vaddr, len))
|
||
return 0;
|
||
else
|
||
found_memory_cnt++;
|
||
}
|
||
}
|
||
}
|
||
else if (v->lval != not_lval && v->modifiable == 0)
|
||
return 0; /* ??? What does this represent? */
|
||
else if (v->lval == lval_register)
|
||
return 0; /* cannot watch a register with a HW watchpoint */
|
||
}
|
||
|
||
/* The expression itself looks suitable for using a hardware
|
||
watchpoint, but give the target machine a chance to reject it. */
|
||
return found_memory_cnt;
|
||
}
|
||
|
||
void
|
||
watch_command_wrapper (char *arg, int from_tty)
|
||
{
|
||
watch_command (arg, from_tty);
|
||
}
|
||
|
||
static void
|
||
watch_command (char *arg, int from_tty)
|
||
{
|
||
watch_command_1 (arg, hw_write, from_tty);
|
||
}
|
||
|
||
void
|
||
rwatch_command_wrapper (char *arg, int from_tty)
|
||
{
|
||
rwatch_command (arg, from_tty);
|
||
}
|
||
|
||
static void
|
||
rwatch_command (char *arg, int from_tty)
|
||
{
|
||
watch_command_1 (arg, hw_read, from_tty);
|
||
}
|
||
|
||
void
|
||
awatch_command_wrapper (char *arg, int from_tty)
|
||
{
|
||
awatch_command (arg, from_tty);
|
||
}
|
||
|
||
static void
|
||
awatch_command (char *arg, int from_tty)
|
||
{
|
||
watch_command_1 (arg, hw_access, from_tty);
|
||
}
|
||
|
||
|
||
/* Helper routines for the until_command routine in infcmd.c. Here
|
||
because it uses the mechanisms of breakpoints. */
|
||
|
||
/* This function is called by fetch_inferior_event via the
|
||
cmd_continuation pointer, to complete the until command. It takes
|
||
care of cleaning up the temporary breakpoints set up by the until
|
||
command. */
|
||
static void
|
||
until_break_command_continuation (struct continuation_arg *arg)
|
||
{
|
||
struct cleanup *cleanups;
|
||
|
||
cleanups = (struct cleanup *) arg->data.pointer;
|
||
do_exec_cleanups (cleanups);
|
||
}
|
||
|
||
void
|
||
until_break_command (char *arg, int from_tty, int anywhere)
|
||
{
|
||
struct symtabs_and_lines sals;
|
||
struct symtab_and_line sal;
|
||
struct frame_info *prev_frame = get_prev_frame (deprecated_selected_frame);
|
||
struct breakpoint *breakpoint;
|
||
struct cleanup *old_chain;
|
||
struct continuation_arg *arg1;
|
||
|
||
|
||
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];
|
||
xfree (sals.sals); /* malloc'd, so freed */
|
||
|
||
if (*arg)
|
||
error ("Junk at end of arguments.");
|
||
|
||
resolve_sal_pc (&sal);
|
||
|
||
if (anywhere)
|
||
/* If the user told us to continue until a specified location,
|
||
we don't specify a frame at which we need to stop. */
|
||
breakpoint = set_momentary_breakpoint (sal, null_frame_id, bp_until);
|
||
else
|
||
/* Otherwise, specify the current frame, because we want to stop only
|
||
at the very same frame. */
|
||
breakpoint = set_momentary_breakpoint (sal,
|
||
get_frame_id (deprecated_selected_frame),
|
||
bp_until);
|
||
|
||
if (!event_loop_p || !target_can_async_p ())
|
||
old_chain = make_cleanup_delete_breakpoint (breakpoint);
|
||
else
|
||
old_chain = make_exec_cleanup_delete_breakpoint (breakpoint);
|
||
|
||
/* If we are running asynchronously, and the target supports async
|
||
execution, we are not waiting for the target to stop, in the call
|
||
tp proceed, below. This means that we cannot delete the
|
||
brekpoints until the target has actually stopped. The only place
|
||
where we get a chance to do that is in fetch_inferior_event, so
|
||
we must set things up for that. */
|
||
|
||
if (event_loop_p && target_can_async_p ())
|
||
{
|
||
/* In this case the arg for the continuation is just the point
|
||
in the exec_cleanups chain from where to start doing
|
||
cleanups, because all the continuation does is the cleanups in
|
||
the exec_cleanup_chain. */
|
||
arg1 =
|
||
(struct continuation_arg *) xmalloc (sizeof (struct continuation_arg));
|
||
arg1->next = NULL;
|
||
arg1->data.pointer = old_chain;
|
||
|
||
add_continuation (until_break_command_continuation, arg1);
|
||
}
|
||
|
||
/* Keep within the current frame, or in frames called by the current
|
||
one. */
|
||
if (prev_frame)
|
||
{
|
||
sal = find_pc_line (get_frame_pc (prev_frame), 0);
|
||
sal.pc = get_frame_pc (prev_frame);
|
||
breakpoint = set_momentary_breakpoint (sal, get_frame_id (prev_frame),
|
||
bp_until);
|
||
if (!event_loop_p || !target_can_async_p ())
|
||
make_cleanup_delete_breakpoint (breakpoint);
|
||
else
|
||
make_exec_cleanup_delete_breakpoint (breakpoint);
|
||
}
|
||
|
||
proceed (-1, TARGET_SIGNAL_DEFAULT, 0);
|
||
/* Do the cleanups now, anly if we are not running asynchronously,
|
||
of if we are, but the target is still synchronous. */
|
||
if (!event_loop_p || !target_can_async_p ())
|
||
do_cleanups (old_chain);
|
||
}
|
||
|
||
#if 0
|
||
/* These aren't used; I don't konw what they were for. */
|
||
/* Set a breakpoint at the catch clause for NAME. */
|
||
static int
|
||
catch_breakpoint (char *name)
|
||
{
|
||
}
|
||
|
||
static int
|
||
disable_catch_breakpoint (void)
|
||
{
|
||
}
|
||
|
||
static int
|
||
delete_catch_breakpoint (void)
|
||
{
|
||
}
|
||
|
||
static int
|
||
enable_catch_breakpoint (void)
|
||
{
|
||
}
|
||
#endif /* 0 */
|
||
|
||
static void
|
||
ep_skip_leading_whitespace (char **s)
|
||
{
|
||
if ((s == NULL) || (*s == NULL))
|
||
return;
|
||
while (isspace (**s))
|
||
*s += 1;
|
||
}
|
||
|
||
/* This function examines a string, and attempts to find a token
|
||
that might be an event name in the leading characters. If a
|
||
possible match is found, a pointer to the last character of
|
||
the token is returned. Else, NULL is returned. */
|
||
|
||
static char *
|
||
ep_find_event_name_end (char *arg)
|
||
{
|
||
char *s = arg;
|
||
char *event_name_end = NULL;
|
||
|
||
/* If we could depend upon the presense of strrpbrk, we'd use that... */
|
||
if (arg == NULL)
|
||
return NULL;
|
||
|
||
/* We break out of the loop when we find a token delimiter.
|
||
Basically, we're looking for alphanumerics and underscores;
|
||
anything else delimites the token. */
|
||
while (*s != '\0')
|
||
{
|
||
if (!isalnum (*s) && (*s != '_'))
|
||
break;
|
||
event_name_end = s;
|
||
s++;
|
||
}
|
||
|
||
return event_name_end;
|
||
}
|
||
|
||
|
||
/* This function attempts to parse an optional "if <cond>" clause
|
||
from the arg string. If one is not found, it returns NULL.
|
||
|
||
Else, it returns a pointer to the condition string. (It does not
|
||
attempt to evaluate the string against a particular block.) And,
|
||
it updates arg to point to the first character following the parsed
|
||
if clause in the arg string. */
|
||
|
||
static char *
|
||
ep_parse_optional_if_clause (char **arg)
|
||
{
|
||
char *cond_string;
|
||
|
||
if (((*arg)[0] != 'i') || ((*arg)[1] != 'f') || !isspace ((*arg)[2]))
|
||
return NULL;
|
||
|
||
/* Skip the "if" keyword. */
|
||
(*arg) += 2;
|
||
|
||
/* Skip any extra leading whitespace, and record the start of the
|
||
condition string. */
|
||
ep_skip_leading_whitespace (arg);
|
||
cond_string = *arg;
|
||
|
||
/* Assume that the condition occupies the remainder of the arg string. */
|
||
(*arg) += strlen (cond_string);
|
||
|
||
return cond_string;
|
||
}
|
||
|
||
/* This function attempts to parse an optional filename from the arg
|
||
string. If one is not found, it returns NULL.
|
||
|
||
Else, it returns a pointer to the parsed filename. (This function
|
||
makes no attempt to verify that a file of that name exists, or is
|
||
accessible.) And, it updates arg to point to the first character
|
||
following the parsed filename in the arg string.
|
||
|
||
Note that clients needing to preserve the returned filename for
|
||
future access should copy it to their own buffers. */
|
||
static char *
|
||
ep_parse_optional_filename (char **arg)
|
||
{
|
||
static char filename[1024];
|
||
char *arg_p = *arg;
|
||
int i;
|
||
char c;
|
||
|
||
if ((*arg_p == '\0') || isspace (*arg_p))
|
||
return NULL;
|
||
|
||
for (i = 0;; i++)
|
||
{
|
||
c = *arg_p;
|
||
if (isspace (c))
|
||
c = '\0';
|
||
filename[i] = c;
|
||
if (c == '\0')
|
||
break;
|
||
arg_p++;
|
||
}
|
||
*arg = arg_p;
|
||
|
||
return filename;
|
||
}
|
||
|
||
/* Commands to deal with catching events, such as signals, exceptions,
|
||
process start/exit, etc. */
|
||
|
||
typedef enum
|
||
{
|
||
catch_fork, catch_vfork
|
||
}
|
||
catch_fork_kind;
|
||
|
||
#if defined(CHILD_INSERT_FORK_CATCHPOINT) || defined(CHILD_INSERT_VFORK_CATCHPOINT)
|
||
static void catch_fork_command_1 (catch_fork_kind fork_kind,
|
||
char *arg, int tempflag, int from_tty);
|
||
|
||
static void
|
||
catch_fork_command_1 (catch_fork_kind fork_kind, char *arg, int tempflag,
|
||
int from_tty)
|
||
{
|
||
char *cond_string = NULL;
|
||
|
||
ep_skip_leading_whitespace (&arg);
|
||
|
||
/* The allowed syntax is:
|
||
catch [v]fork
|
||
catch [v]fork if <cond>
|
||
|
||
First, check if there's an if clause. */
|
||
cond_string = ep_parse_optional_if_clause (&arg);
|
||
|
||
if ((*arg != '\0') && !isspace (*arg))
|
||
error ("Junk at end of arguments.");
|
||
|
||
/* If this target supports it, create a fork or vfork catchpoint
|
||
and enable reporting of such events. */
|
||
switch (fork_kind)
|
||
{
|
||
case catch_fork:
|
||
create_fork_event_catchpoint (tempflag, cond_string);
|
||
break;
|
||
case catch_vfork:
|
||
create_vfork_event_catchpoint (tempflag, cond_string);
|
||
break;
|
||
default:
|
||
error ("unsupported or unknown fork kind; cannot catch it");
|
||
break;
|
||
}
|
||
}
|
||
#endif
|
||
|
||
#if defined(CHILD_INSERT_EXEC_CATCHPOINT)
|
||
static void
|
||
catch_exec_command_1 (char *arg, int tempflag, int from_tty)
|
||
{
|
||
char *cond_string = NULL;
|
||
|
||
ep_skip_leading_whitespace (&arg);
|
||
|
||
/* The allowed syntax is:
|
||
catch exec
|
||
catch exec if <cond>
|
||
|
||
First, check if there's an if clause. */
|
||
cond_string = ep_parse_optional_if_clause (&arg);
|
||
|
||
if ((*arg != '\0') && !isspace (*arg))
|
||
error ("Junk at end of arguments.");
|
||
|
||
/* If this target supports it, create an exec catchpoint
|
||
and enable reporting of such events. */
|
||
create_exec_event_catchpoint (tempflag, cond_string);
|
||
}
|
||
#endif
|
||
|
||
#if defined(SOLIB_ADD)
|
||
static void
|
||
catch_load_command_1 (char *arg, int tempflag, int from_tty)
|
||
{
|
||
char *dll_pathname = NULL;
|
||
char *cond_string = NULL;
|
||
|
||
ep_skip_leading_whitespace (&arg);
|
||
|
||
/* The allowed syntax is:
|
||
catch load
|
||
catch load if <cond>
|
||
catch load <filename>
|
||
catch load <filename> if <cond>
|
||
|
||
The user is not allowed to specify the <filename> after an
|
||
if clause.
|
||
|
||
We'll ignore the pathological case of a file named "if".
|
||
|
||
First, check if there's an if clause. If so, then there
|
||
cannot be a filename. */
|
||
cond_string = ep_parse_optional_if_clause (&arg);
|
||
|
||
/* If there was an if clause, then there cannot be a filename.
|
||
Else, there might be a filename and an if clause. */
|
||
if (cond_string == NULL)
|
||
{
|
||
dll_pathname = ep_parse_optional_filename (&arg);
|
||
ep_skip_leading_whitespace (&arg);
|
||
cond_string = ep_parse_optional_if_clause (&arg);
|
||
}
|
||
|
||
if ((*arg != '\0') && !isspace (*arg))
|
||
error ("Junk at end of arguments.");
|
||
|
||
/* Create a load breakpoint that only triggers when a load of
|
||
the specified dll (or any dll, if no pathname was specified)
|
||
occurs. */
|
||
SOLIB_CREATE_CATCH_LOAD_HOOK (PIDGET (inferior_ptid), tempflag,
|
||
dll_pathname, cond_string);
|
||
}
|
||
|
||
static void
|
||
catch_unload_command_1 (char *arg, int tempflag, int from_tty)
|
||
{
|
||
char *dll_pathname = NULL;
|
||
char *cond_string = NULL;
|
||
|
||
ep_skip_leading_whitespace (&arg);
|
||
|
||
/* The allowed syntax is:
|
||
catch unload
|
||
catch unload if <cond>
|
||
catch unload <filename>
|
||
catch unload <filename> if <cond>
|
||
|
||
The user is not allowed to specify the <filename> after an
|
||
if clause.
|
||
|
||
We'll ignore the pathological case of a file named "if".
|
||
|
||
First, check if there's an if clause. If so, then there
|
||
cannot be a filename. */
|
||
cond_string = ep_parse_optional_if_clause (&arg);
|
||
|
||
/* If there was an if clause, then there cannot be a filename.
|
||
Else, there might be a filename and an if clause. */
|
||
if (cond_string == NULL)
|
||
{
|
||
dll_pathname = ep_parse_optional_filename (&arg);
|
||
ep_skip_leading_whitespace (&arg);
|
||
cond_string = ep_parse_optional_if_clause (&arg);
|
||
}
|
||
|
||
if ((*arg != '\0') && !isspace (*arg))
|
||
error ("Junk at end of arguments.");
|
||
|
||
/* Create an unload breakpoint that only triggers when an unload of
|
||
the specified dll (or any dll, if no pathname was specified)
|
||
occurs. */
|
||
SOLIB_CREATE_CATCH_UNLOAD_HOOK (PIDGET (inferior_ptid), tempflag,
|
||
dll_pathname, cond_string);
|
||
}
|
||
#endif /* SOLIB_ADD */
|
||
|
||
/* Commands to deal with catching exceptions. */
|
||
|
||
/* Set a breakpoint at the specified callback routine for an
|
||
exception event callback */
|
||
|
||
static void
|
||
create_exception_catchpoint (int tempflag, char *cond_string,
|
||
enum exception_event_kind ex_event,
|
||
struct symtab_and_line *sal)
|
||
{
|
||
struct breakpoint *b;
|
||
int thread = -1; /* All threads. */
|
||
enum bptype bptype;
|
||
|
||
if (!sal) /* no exception support? */
|
||
return;
|
||
|
||
switch (ex_event)
|
||
{
|
||
case EX_EVENT_THROW:
|
||
bptype = bp_catch_throw;
|
||
break;
|
||
case EX_EVENT_CATCH:
|
||
bptype = bp_catch_catch;
|
||
break;
|
||
default: /* error condition */
|
||
error ("Internal error -- invalid catchpoint kind");
|
||
}
|
||
|
||
b = set_raw_breakpoint (*sal, bptype);
|
||
set_breakpoint_count (breakpoint_count + 1);
|
||
b->number = breakpoint_count;
|
||
b->cond = NULL;
|
||
b->cond_string = (cond_string == NULL) ?
|
||
NULL : savestring (cond_string, strlen (cond_string));
|
||
b->thread = thread;
|
||
b->addr_string = NULL;
|
||
b->enable_state = bp_enabled;
|
||
b->disposition = tempflag ? disp_del : disp_donttouch;
|
||
mention (b);
|
||
}
|
||
|
||
static enum print_stop_action
|
||
print_exception_catchpoint (struct breakpoint *b)
|
||
{
|
||
annotate_catchpoint (b->number);
|
||
|
||
if (strstr (b->addr_string, "throw") != NULL)
|
||
printf_filtered ("\nCatchpoint %d (exception thrown)\n",
|
||
b->number);
|
||
else
|
||
printf_filtered ("\nCatchpoint %d (exception caught)\n",
|
||
b->number);
|
||
|
||
return PRINT_SRC_AND_LOC;
|
||
}
|
||
|
||
static void
|
||
print_one_exception_catchpoint (struct breakpoint *b, CORE_ADDR *last_addr)
|
||
{
|
||
if (addressprint)
|
||
{
|
||
annotate_field (4);
|
||
ui_out_field_core_addr (uiout, "addr", b->address);
|
||
}
|
||
annotate_field (5);
|
||
*last_addr = b->address;
|
||
if (strstr (b->addr_string, "throw") != NULL)
|
||
ui_out_field_string (uiout, "what", "exception throw");
|
||
else
|
||
ui_out_field_string (uiout, "what", "exception catch");
|
||
}
|
||
|
||
static void
|
||
print_mention_exception_catchpoint (struct breakpoint *b)
|
||
{
|
||
if (strstr (b->addr_string, "throw") != NULL)
|
||
printf_filtered ("Catchpoint %d (throw)", b->number);
|
||
else
|
||
printf_filtered ("Catchpoint %d (catch)", b->number);
|
||
}
|
||
|
||
static struct breakpoint_ops gnu_v3_exception_catchpoint_ops = {
|
||
print_exception_catchpoint,
|
||
print_one_exception_catchpoint,
|
||
print_mention_exception_catchpoint
|
||
};
|
||
|
||
static int
|
||
handle_gnu_v3_exceptions (int tempflag, char *cond_string,
|
||
enum exception_event_kind ex_event, int from_tty)
|
||
{
|
||
char *trigger_func_name, *nameptr;
|
||
struct symtabs_and_lines sals;
|
||
struct breakpoint *b;
|
||
|
||
if (ex_event == EX_EVENT_CATCH)
|
||
trigger_func_name = xstrdup ("__cxa_begin_catch");
|
||
else
|
||
trigger_func_name = xstrdup ("__cxa_throw");
|
||
|
||
nameptr = trigger_func_name;
|
||
sals = decode_line_1 (&nameptr, 1, NULL, 0, NULL);
|
||
if (sals.nelts == 0)
|
||
{
|
||
xfree (trigger_func_name);
|
||
return 0;
|
||
}
|
||
|
||
b = set_raw_breakpoint (sals.sals[0], bp_breakpoint);
|
||
set_breakpoint_count (breakpoint_count + 1);
|
||
b->number = breakpoint_count;
|
||
b->cond = NULL;
|
||
b->cond_string = (cond_string == NULL) ?
|
||
NULL : savestring (cond_string, strlen (cond_string));
|
||
b->thread = -1;
|
||
b->addr_string = trigger_func_name;
|
||
b->enable_state = bp_enabled;
|
||
b->disposition = tempflag ? disp_del : disp_donttouch;
|
||
b->ops = &gnu_v3_exception_catchpoint_ops;
|
||
|
||
xfree (sals.sals);
|
||
mention (b);
|
||
return 1;
|
||
}
|
||
|
||
/* Deal with "catch catch" and "catch throw" commands */
|
||
|
||
static void
|
||
catch_exception_command_1 (enum exception_event_kind ex_event, char *arg,
|
||
int tempflag, int from_tty)
|
||
{
|
||
char *cond_string = NULL;
|
||
struct symtab_and_line *sal = NULL;
|
||
|
||
ep_skip_leading_whitespace (&arg);
|
||
|
||
cond_string = ep_parse_optional_if_clause (&arg);
|
||
|
||
if ((*arg != '\0') && !isspace (*arg))
|
||
error ("Junk at end of arguments.");
|
||
|
||
if ((ex_event != EX_EVENT_THROW) &&
|
||
(ex_event != EX_EVENT_CATCH))
|
||
error ("Unsupported or unknown exception event; cannot catch it");
|
||
|
||
if (handle_gnu_v3_exceptions (tempflag, cond_string, ex_event, from_tty))
|
||
return;
|
||
|
||
/* See if we can find a callback routine */
|
||
sal = target_enable_exception_callback (ex_event, 1);
|
||
|
||
if (sal)
|
||
{
|
||
/* We have callbacks from the runtime system for exceptions.
|
||
Set a breakpoint on the sal found, if no errors */
|
||
if (sal != (struct symtab_and_line *) -1)
|
||
create_exception_catchpoint (tempflag, cond_string, ex_event, sal);
|
||
else
|
||
return; /* something went wrong with setting up callbacks */
|
||
}
|
||
|
||
warning ("Unsupported with this platform/compiler combination.");
|
||
}
|
||
|
||
/* Cover routine to allow wrapping target_enable_exception_catchpoints
|
||
inside a catch_errors */
|
||
|
||
static int
|
||
cover_target_enable_exception_callback (void *arg)
|
||
{
|
||
args_for_catchpoint_enable *args = arg;
|
||
struct symtab_and_line *sal;
|
||
sal = target_enable_exception_callback (args->kind, args->enable_p);
|
||
if (sal == NULL)
|
||
return 0;
|
||
else if (sal == (struct symtab_and_line *) -1)
|
||
return -1;
|
||
else
|
||
return 1; /*is valid */
|
||
}
|
||
|
||
static void
|
||
catch_command_1 (char *arg, int tempflag, int from_tty)
|
||
{
|
||
|
||
/* The first argument may be an event name, such as "start" or "load".
|
||
If so, then handle it as such. If it doesn't match an event name,
|
||
then attempt to interpret it as an exception name. (This latter is
|
||
the v4.16-and-earlier GDB meaning of the "catch" command.)
|
||
|
||
First, try to find the bounds of what might be an event name. */
|
||
char *arg1_start = arg;
|
||
char *arg1_end;
|
||
int arg1_length;
|
||
|
||
if (arg1_start == NULL)
|
||
{
|
||
/* Old behaviour was to use pre-v-4.16 syntax */
|
||
/* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
|
||
/* return; */
|
||
/* Now, this is not allowed */
|
||
error ("Catch requires an event name.");
|
||
|
||
}
|
||
arg1_end = ep_find_event_name_end (arg1_start);
|
||
if (arg1_end == NULL)
|
||
error ("catch requires an event");
|
||
arg1_length = arg1_end + 1 - arg1_start;
|
||
|
||
/* Try to match what we found against known event names. */
|
||
if (strncmp (arg1_start, "signal", arg1_length) == 0)
|
||
{
|
||
error ("Catch of signal not yet implemented");
|
||
}
|
||
else if (strncmp (arg1_start, "catch", arg1_length) == 0)
|
||
{
|
||
catch_exception_command_1 (EX_EVENT_CATCH, arg1_end + 1,
|
||
tempflag, from_tty);
|
||
}
|
||
else if (strncmp (arg1_start, "throw", arg1_length) == 0)
|
||
{
|
||
catch_exception_command_1 (EX_EVENT_THROW, arg1_end + 1,
|
||
tempflag, from_tty);
|
||
}
|
||
else if (strncmp (arg1_start, "thread_start", arg1_length) == 0)
|
||
{
|
||
error ("Catch of thread_start not yet implemented");
|
||
}
|
||
else if (strncmp (arg1_start, "thread_exit", arg1_length) == 0)
|
||
{
|
||
error ("Catch of thread_exit not yet implemented");
|
||
}
|
||
else if (strncmp (arg1_start, "thread_join", arg1_length) == 0)
|
||
{
|
||
error ("Catch of thread_join not yet implemented");
|
||
}
|
||
else if (strncmp (arg1_start, "start", arg1_length) == 0)
|
||
{
|
||
error ("Catch of start not yet implemented");
|
||
}
|
||
else if (strncmp (arg1_start, "exit", arg1_length) == 0)
|
||
{
|
||
error ("Catch of exit not yet implemented");
|
||
}
|
||
else if (strncmp (arg1_start, "fork", arg1_length) == 0)
|
||
{
|
||
#if defined(CHILD_INSERT_FORK_CATCHPOINT)
|
||
catch_fork_command_1 (catch_fork, arg1_end + 1, tempflag, from_tty);
|
||
#else
|
||
error ("Catch of fork not yet implemented");
|
||
#endif
|
||
}
|
||
else if (strncmp (arg1_start, "vfork", arg1_length) == 0)
|
||
{
|
||
#if defined(CHILD_INSERT_VFORK_CATCHPOINT)
|
||
catch_fork_command_1 (catch_vfork, arg1_end + 1, tempflag, from_tty);
|
||
#else
|
||
error ("Catch of vfork not yet implemented");
|
||
#endif
|
||
}
|
||
else if (strncmp (arg1_start, "exec", arg1_length) == 0)
|
||
{
|
||
#if defined(CHILD_INSERT_EXEC_CATCHPOINT)
|
||
catch_exec_command_1 (arg1_end + 1, tempflag, from_tty);
|
||
#else
|
||
error ("Catch of exec not yet implemented");
|
||
#endif
|
||
}
|
||
else if (strncmp (arg1_start, "load", arg1_length) == 0)
|
||
{
|
||
#if defined(SOLIB_ADD)
|
||
catch_load_command_1 (arg1_end + 1, tempflag, from_tty);
|
||
#else
|
||
error ("Catch of load not implemented");
|
||
#endif
|
||
}
|
||
else if (strncmp (arg1_start, "unload", arg1_length) == 0)
|
||
{
|
||
#if defined(SOLIB_ADD)
|
||
catch_unload_command_1 (arg1_end + 1, tempflag, from_tty);
|
||
#else
|
||
error ("Catch of load not implemented");
|
||
#endif
|
||
}
|
||
else if (strncmp (arg1_start, "stop", arg1_length) == 0)
|
||
{
|
||
error ("Catch of stop not yet implemented");
|
||
}
|
||
|
||
/* This doesn't appear to be an event name */
|
||
|
||
else
|
||
{
|
||
/* Pre-v.4.16 behaviour was to treat the argument
|
||
as the name of an exception */
|
||
/* catch_throw_command_1 (arg1_start, tempflag, from_tty); */
|
||
/* Now this is not allowed */
|
||
error ("Unknown event kind specified for catch");
|
||
|
||
}
|
||
}
|
||
|
||
/* Used by the gui, could be made a worker for other things. */
|
||
|
||
struct breakpoint *
|
||
set_breakpoint_sal (struct symtab_and_line sal)
|
||
{
|
||
struct breakpoint *b;
|
||
b = set_raw_breakpoint (sal, bp_breakpoint);
|
||
set_breakpoint_count (breakpoint_count + 1);
|
||
b->number = breakpoint_count;
|
||
b->cond = 0;
|
||
b->thread = -1;
|
||
return b;
|
||
}
|
||
|
||
#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 (char *args)
|
||
{
|
||
/* Map the disable command to catch clauses described in ARGS. */
|
||
}
|
||
|
||
/* Enable breakpoints on all catch clauses described in ARGS. */
|
||
static void
|
||
enable_catch (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 (char *args)
|
||
{
|
||
/* Map the delete command to catch clauses described in ARGS. */
|
||
}
|
||
#endif /* 0 */
|
||
|
||
static void
|
||
catch_command (char *arg, int from_tty)
|
||
{
|
||
catch_command_1 (arg, 0, from_tty);
|
||
}
|
||
|
||
|
||
static void
|
||
tcatch_command (char *arg, int from_tty)
|
||
{
|
||
catch_command_1 (arg, 1, from_tty);
|
||
}
|
||
|
||
/* Delete breakpoints by address or line. */
|
||
|
||
static void
|
||
clear_command (char *arg, int from_tty)
|
||
{
|
||
struct breakpoint *b, *tmp, *prev, *found;
|
||
int default_match;
|
||
struct symtabs_and_lines sals;
|
||
struct symtab_and_line sal;
|
||
int i;
|
||
|
||
if (arg)
|
||
{
|
||
sals = decode_line_spec (arg, 1);
|
||
default_match = 0;
|
||
}
|
||
else
|
||
{
|
||
sals.sals = (struct symtab_and_line *)
|
||
xmalloc (sizeof (struct symtab_and_line));
|
||
make_cleanup (xfree, sals.sals);
|
||
init_sal (&sal); /* initialize to zeroes */
|
||
sal.line = default_breakpoint_line;
|
||
sal.symtab = default_breakpoint_symtab;
|
||
sal.pc = default_breakpoint_address;
|
||
if (sal.symtab == 0)
|
||
error ("No source file specified.");
|
||
|
||
sals.sals[0] = sal;
|
||
sals.nelts = 1;
|
||
|
||
default_match = 1;
|
||
}
|
||
|
||
/* For each line spec given, delete bps which correspond
|
||
to it. Do it in two passes, solely to preserve the current
|
||
behavior that from_tty is forced true if we delete more than
|
||
one breakpoint. */
|
||
|
||
found = NULL;
|
||
for (i = 0; i < sals.nelts; i++)
|
||
{
|
||
/* If exact pc given, clear bpts at that pc.
|
||
If line given (pc == 0), clear all bpts on specified line.
|
||
If defaulting, clear all bpts on default line
|
||
or at default pc.
|
||
|
||
defaulting sal.pc != 0 tests to do
|
||
|
||
0 1 pc
|
||
1 1 pc _and_ line
|
||
0 0 line
|
||
1 0 <can't happen> */
|
||
|
||
sal = sals.sals[i];
|
||
prev = NULL;
|
||
|
||
/* Find all matching breakpoints, remove them from the
|
||
breakpoint chain, and add them to the 'found' chain. */
|
||
ALL_BREAKPOINTS_SAFE (b, tmp)
|
||
{
|
||
/* Are we going to delete b? */
|
||
if (b->type != bp_none
|
||
&& b->type != bp_watchpoint
|
||
&& b->type != bp_hardware_watchpoint
|
||
&& b->type != bp_read_watchpoint
|
||
&& b->type != bp_access_watchpoint
|
||
/* Not if b is a watchpoint of any sort... */
|
||
&& (((sal.pc && (b->address == sal.pc))
|
||
&& (!section_is_overlay (b->section)
|
||
|| b->section == sal.section))
|
||
/* Yes, if sal.pc matches b (modulo overlays). */
|
||
|| ((default_match || (0 == sal.pc))
|
||
&& b->source_file != NULL
|
||
&& sal.symtab != NULL
|
||
&& STREQ (b->source_file, sal.symtab->filename)
|
||
&& b->line_number == sal.line)))
|
||
/* Yes, if sal source file and line matches b. */
|
||
{
|
||
/* Remove it from breakpoint_chain... */
|
||
if (b == breakpoint_chain)
|
||
{
|
||
/* b is at the head of the list */
|
||
breakpoint_chain = b->next;
|
||
}
|
||
else
|
||
{
|
||
prev->next = b->next;
|
||
}
|
||
/* And add it to 'found' chain. */
|
||
b->next = found;
|
||
found = b;
|
||
}
|
||
else
|
||
{
|
||
/* Keep b, and keep a pointer to it. */
|
||
prev = b;
|
||
}
|
||
}
|
||
}
|
||
/* Now go thru the 'found' chain and delete them. */
|
||
if (found == 0)
|
||
{
|
||
if (arg)
|
||
error ("No breakpoint at %s.", arg);
|
||
else
|
||
error ("No breakpoint at this line.");
|
||
}
|
||
|
||
if (found->next)
|
||
from_tty = 1; /* Always report if deleted more than one */
|
||
if (from_tty)
|
||
printf_unfiltered ("Deleted breakpoint%s ", found->next ? "s" : "");
|
||
breakpoints_changed ();
|
||
while (found)
|
||
{
|
||
if (from_tty)
|
||
printf_unfiltered ("%d ", found->number);
|
||
tmp = found->next;
|
||
delete_breakpoint (found);
|
||
found = tmp;
|
||
}
|
||
if (from_tty)
|
||
putchar_unfiltered ('\n');
|
||
}
|
||
|
||
/* Delete breakpoint in BS if they are `delete' breakpoints and
|
||
all breakpoints that are marked for deletion, whether hit or not.
|
||
This is called after any breakpoint is hit, or after errors. */
|
||
|
||
void
|
||
breakpoint_auto_delete (bpstat bs)
|
||
{
|
||
struct breakpoint *b, *temp;
|
||
|
||
for (; bs; bs = bs->next)
|
||
if (bs->breakpoint_at && bs->breakpoint_at->disposition == disp_del
|
||
&& bs->stop)
|
||
delete_breakpoint (bs->breakpoint_at);
|
||
|
||
ALL_BREAKPOINTS_SAFE (b, temp)
|
||
{
|
||
if (b->disposition == disp_del_at_next_stop)
|
||
delete_breakpoint (b);
|
||
}
|
||
}
|
||
|
||
/* Delete a breakpoint and clean up all traces of it in the data
|
||
structures. */
|
||
|
||
void
|
||
delete_breakpoint (struct breakpoint *bpt)
|
||
{
|
||
struct breakpoint *b;
|
||
bpstat bs;
|
||
|
||
if (bpt == NULL)
|
||
error ("Internal error (attempted to delete a NULL breakpoint)");
|
||
|
||
|
||
/* Has this bp already been deleted? This can happen because multiple
|
||
lists can hold pointers to bp's. bpstat lists are especial culprits.
|
||
|
||
One example of this happening is a watchpoint's scope bp. When the
|
||
scope bp triggers, we notice that the watchpoint is out of scope, and
|
||
delete it. We also delete its scope bp. But the scope bp is marked
|
||
"auto-deleting", and is already on a bpstat. That bpstat is then
|
||
checked for auto-deleting bp's, which are deleted.
|
||
|
||
A real solution to this problem might involve reference counts in bp's,
|
||
and/or giving them pointers back to their referencing bpstat's, and
|
||
teaching delete_breakpoint to only free a bp's storage when no more
|
||
references were extent. A cheaper bandaid was chosen. */
|
||
if (bpt->type == bp_none)
|
||
return;
|
||
|
||
if (delete_breakpoint_hook)
|
||
delete_breakpoint_hook (bpt);
|
||
breakpoint_delete_event (bpt->number);
|
||
|
||
if (bpt->inserted)
|
||
remove_breakpoint (bpt, mark_inserted);
|
||
|
||
if (breakpoint_chain == bpt)
|
||
breakpoint_chain = bpt->next;
|
||
|
||
/* If we have callback-style exception catchpoints, don't go through
|
||
the adjustments to the C++ runtime library etc. if the inferior
|
||
isn't actually running. target_enable_exception_callback for a
|
||
null target ops vector gives an undesirable error message, so we
|
||
check here and avoid it. Since currently (1997-09-17) only HP-UX aCC's
|
||
exceptions are supported in this way, it's OK for now. FIXME */
|
||
if (ep_is_exception_catchpoint (bpt) && target_has_execution)
|
||
{
|
||
/* Format possible error msg */
|
||
char *message = xstrprintf ("Error in deleting catchpoint %d:\n",
|
||
bpt->number);
|
||
struct cleanup *cleanups = make_cleanup (xfree, message);
|
||
args_for_catchpoint_enable args;
|
||
args.kind = bpt->type == bp_catch_catch ?
|
||
EX_EVENT_CATCH : EX_EVENT_THROW;
|
||
args.enable_p = 0;
|
||
catch_errors (cover_target_enable_exception_callback, &args,
|
||
message, RETURN_MASK_ALL);
|
||
do_cleanups (cleanups);
|
||
}
|
||
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->next == bpt)
|
||
{
|
||
b->next = bpt->next;
|
||
break;
|
||
}
|
||
|
||
check_duplicates (bpt);
|
||
/* If this breakpoint was inserted, and there is another breakpoint
|
||
at the same address, we need to insert the other breakpoint. */
|
||
if (bpt->inserted
|
||
&& bpt->type != bp_hardware_watchpoint
|
||
&& bpt->type != bp_read_watchpoint
|
||
&& bpt->type != bp_access_watchpoint
|
||
&& bpt->type != bp_catch_fork
|
||
&& bpt->type != bp_catch_vfork
|
||
&& bpt->type != bp_catch_exec)
|
||
{
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->address == bpt->address
|
||
&& b->section == bpt->section
|
||
&& !b->duplicate
|
||
&& b->enable_state != bp_disabled
|
||
&& b->enable_state != bp_shlib_disabled
|
||
&& b->enable_state != bp_call_disabled)
|
||
{
|
||
int val;
|
||
|
||
/* We should never reach this point if there is a permanent
|
||
breakpoint at the same address as the one being deleted.
|
||
If there is a permanent breakpoint somewhere, it should
|
||
always be the only one inserted. */
|
||
if (b->enable_state == bp_permanent)
|
||
internal_error (__FILE__, __LINE__,
|
||
"another breakpoint was inserted on top of "
|
||
"a permanent breakpoint");
|
||
|
||
if (b->type == bp_hardware_breakpoint)
|
||
val = target_insert_hw_breakpoint (b->address, b->shadow_contents);
|
||
else
|
||
val = target_insert_breakpoint (b->address, b->shadow_contents);
|
||
|
||
/* If there was an error in the insert, print a message, then stop execution. */
|
||
if (val != 0)
|
||
{
|
||
struct ui_file *tmp_error_stream = mem_fileopen ();
|
||
make_cleanup_ui_file_delete (tmp_error_stream);
|
||
|
||
|
||
if (b->type == bp_hardware_breakpoint)
|
||
{
|
||
fprintf_unfiltered (tmp_error_stream,
|
||
"Cannot insert hardware breakpoint %d.\n"
|
||
"You may have requested too many hardware breakpoints.\n",
|
||
b->number);
|
||
}
|
||
else
|
||
{
|
||
fprintf_unfiltered (tmp_error_stream, "Cannot insert breakpoint %d.\n", b->number);
|
||
fprintf_filtered (tmp_error_stream, "Error accessing memory address ");
|
||
print_address_numeric (b->address, 1, tmp_error_stream);
|
||
fprintf_filtered (tmp_error_stream, ": %s.\n",
|
||
safe_strerror (val));
|
||
}
|
||
|
||
fprintf_unfiltered (tmp_error_stream,"The same program may be running in another process.");
|
||
target_terminal_ours_for_output ();
|
||
error_stream(tmp_error_stream);
|
||
}
|
||
else
|
||
b->inserted = 1;
|
||
}
|
||
}
|
||
|
||
free_command_lines (&bpt->commands);
|
||
if (bpt->cond)
|
||
xfree (bpt->cond);
|
||
if (bpt->cond_string != NULL)
|
||
xfree (bpt->cond_string);
|
||
if (bpt->addr_string != NULL)
|
||
xfree (bpt->addr_string);
|
||
if (bpt->exp != NULL)
|
||
xfree (bpt->exp);
|
||
if (bpt->exp_string != NULL)
|
||
xfree (bpt->exp_string);
|
||
if (bpt->val != NULL)
|
||
value_free (bpt->val);
|
||
if (bpt->source_file != NULL)
|
||
xfree (bpt->source_file);
|
||
if (bpt->dll_pathname != NULL)
|
||
xfree (bpt->dll_pathname);
|
||
if (bpt->triggered_dll_pathname != NULL)
|
||
xfree (bpt->triggered_dll_pathname);
|
||
if (bpt->exec_pathname != NULL)
|
||
xfree (bpt->exec_pathname);
|
||
|
||
/* 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;
|
||
bs->old_val = NULL;
|
||
/* bs->commands will be freed later. */
|
||
}
|
||
/* On the chance that someone will soon try again to delete this same
|
||
bp, we mark it as deleted before freeing its storage. */
|
||
bpt->type = bp_none;
|
||
|
||
xfree (bpt);
|
||
}
|
||
|
||
static void
|
||
do_delete_breakpoint_cleanup (void *b)
|
||
{
|
||
delete_breakpoint (b);
|
||
}
|
||
|
||
struct cleanup *
|
||
make_cleanup_delete_breakpoint (struct breakpoint *b)
|
||
{
|
||
return make_cleanup (do_delete_breakpoint_cleanup, b);
|
||
}
|
||
|
||
struct cleanup *
|
||
make_exec_cleanup_delete_breakpoint (struct breakpoint *b)
|
||
{
|
||
return make_exec_cleanup (do_delete_breakpoint_cleanup, b);
|
||
}
|
||
|
||
void
|
||
delete_command (char *arg, int from_tty)
|
||
{
|
||
struct breakpoint *b, *temp;
|
||
|
||
dont_repeat ();
|
||
|
||
if (arg == 0)
|
||
{
|
||
int breaks_to_delete = 0;
|
||
|
||
/* Delete all breakpoints if no argument.
|
||
Do not delete internal or call-dummy breakpoints, these
|
||
have to be deleted with an explicit breakpoint number argument. */
|
||
ALL_BREAKPOINTS (b)
|
||
{
|
||
if (b->type != bp_call_dummy &&
|
||
b->type != bp_shlib_event &&
|
||
b->type != bp_thread_event &&
|
||
b->type != bp_overlay_event &&
|
||
b->number >= 0)
|
||
breaks_to_delete = 1;
|
||
}
|
||
|
||
/* Ask user only if there are some breakpoints to delete. */
|
||
if (!from_tty
|
||
|| (breaks_to_delete && query ("Delete all breakpoints? ")))
|
||
{
|
||
ALL_BREAKPOINTS_SAFE (b, temp)
|
||
{
|
||
if (b->type != bp_call_dummy &&
|
||
b->type != bp_shlib_event &&
|
||
b->type != bp_thread_event &&
|
||
b->type != bp_overlay_event &&
|
||
b->number >= 0)
|
||
delete_breakpoint (b);
|
||
}
|
||
}
|
||
}
|
||
else
|
||
map_breakpoint_numbers (arg, delete_breakpoint);
|
||
}
|
||
|
||
/* Reset a breakpoint given it's struct breakpoint * BINT.
|
||
The value we return ends up being the return value from catch_errors.
|
||
Unused in this case. */
|
||
|
||
static int
|
||
breakpoint_re_set_one (void *bint)
|
||
{
|
||
/* get past catch_errs */
|
||
struct breakpoint *b = (struct breakpoint *) bint;
|
||
struct value *mark;
|
||
int i;
|
||
struct symtabs_and_lines sals;
|
||
char *s;
|
||
enum enable_state save_enable;
|
||
|
||
switch (b->type)
|
||
{
|
||
case bp_none:
|
||
warning ("attempted to reset apparently deleted breakpoint #%d?",
|
||
b->number);
|
||
return 0;
|
||
case bp_breakpoint:
|
||
case bp_hardware_breakpoint:
|
||
case bp_catch_load:
|
||
case bp_catch_unload:
|
||
if (b->addr_string == NULL)
|
||
{
|
||
/* Anything without a string can't be re-set. */
|
||
delete_breakpoint (b);
|
||
return 0;
|
||
}
|
||
/* HACK: cagney/2001-11-11: kettenis/2001-11-11: MarkK wrote:
|
||
|
||
``And a hack it is, although Apple's Darwin version of GDB
|
||
contains an almost identical hack to implement a "future
|
||
break" command. It seems to work in many real world cases,
|
||
but it is easy to come up with a test case where the patch
|
||
doesn't help at all.''
|
||
|
||
``It seems that the way GDB implements breakpoints - in -
|
||
shared - libraries was designed for a.out shared library
|
||
systems (SunOS 4) where shared libraries were loaded at a
|
||
fixed address in memory. Since ELF shared libraries can (and
|
||
will) be loaded at any address in memory, things break.
|
||
Fixing this is not trivial. Therefore, I'm not sure whether
|
||
we should add this hack to the branch only. I cannot
|
||
guarantee that things will be fixed on the trunk in the near
|
||
future.''
|
||
|
||
In case we have a problem, disable this breakpoint. We'll
|
||
restore its status if we succeed. Don't disable a
|
||
shlib_disabled breakpoint though. There's a fair chance we
|
||
can't re-set it if the shared library it's in hasn't been
|
||
loaded yet. */
|
||
save_enable = b->enable_state;
|
||
if (b->enable_state != bp_shlib_disabled)
|
||
b->enable_state = bp_disabled;
|
||
|
||
set_language (b->language);
|
||
input_radix = b->input_radix;
|
||
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)
|
||
xfree (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)
|
||
xfree (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;
|
||
|
||
/* Used to check for duplicates here, but that can
|
||
cause trouble, as it doesn't check for disabled
|
||
breakpoints. */
|
||
|
||
mention (b);
|
||
|
||
/* Might be better to do this just once per breakpoint_re_set,
|
||
rather than once for every breakpoint. */
|
||
breakpoints_changed ();
|
||
}
|
||
b->section = sals.sals[i].section;
|
||
b->enable_state = save_enable; /* Restore it, this worked. */
|
||
|
||
|
||
/* Now that this is re-enabled, check_duplicates
|
||
can be used. */
|
||
check_duplicates (b);
|
||
|
||
}
|
||
xfree (sals.sals);
|
||
break;
|
||
|
||
case bp_watchpoint:
|
||
case bp_hardware_watchpoint:
|
||
case bp_read_watchpoint:
|
||
case bp_access_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 function names. */
|
||
|
||
/* So for now, just use a global context. */
|
||
if (b->exp)
|
||
xfree (b->exp);
|
||
b->exp = parse_expression (b->exp_string);
|
||
b->exp_valid_block = innermost_block;
|
||
mark = value_mark ();
|
||
if (b->val)
|
||
value_free (b->val);
|
||
b->val = evaluate_expression (b->exp);
|
||
release_value (b->val);
|
||
if (VALUE_LAZY (b->val) && b->enable_state == bp_enabled)
|
||
value_fetch_lazy (b->val);
|
||
|
||
if (b->cond_string != NULL)
|
||
{
|
||
s = b->cond_string;
|
||
if (b->cond)
|
||
xfree (b->cond);
|
||
b->cond = parse_exp_1 (&s, (struct block *) 0, 0);
|
||
}
|
||
if (b->enable_state == bp_enabled)
|
||
mention (b);
|
||
value_free_to_mark (mark);
|
||
break;
|
||
case bp_catch_catch:
|
||
case bp_catch_throw:
|
||
break;
|
||
/* We needn't really do anything to reset these, since the mask
|
||
that requests them is unaffected by e.g., new libraries being
|
||
loaded. */
|
||
case bp_catch_fork:
|
||
case bp_catch_vfork:
|
||
case bp_catch_exec:
|
||
break;
|
||
|
||
default:
|
||
printf_filtered ("Deleting unknown breakpoint type %d\n", b->type);
|
||
/* fall through */
|
||
/* Delete longjmp and overlay event breakpoints; they will be
|
||
reset later by breakpoint_re_set. */
|
||
case bp_longjmp:
|
||
case bp_longjmp_resume:
|
||
case bp_overlay_event:
|
||
delete_breakpoint (b);
|
||
break;
|
||
|
||
/* This breakpoint is special, it's set up when the inferior
|
||
starts and we really don't want to touch it. */
|
||
case bp_shlib_event:
|
||
|
||
/* Like bp_shlib_event, this breakpoint type is special.
|
||
Once it is set up, we do not want to touch it. */
|
||
case bp_thread_event:
|
||
|
||
/* Keep temporary breakpoints, which can be encountered when we step
|
||
over a dlopen call and SOLIB_ADD is resetting the breakpoints.
|
||
Otherwise these should have been blown away via the cleanup chain
|
||
or by breakpoint_init_inferior when we rerun the executable. */
|
||
case bp_until:
|
||
case bp_finish:
|
||
case bp_watchpoint_scope:
|
||
case bp_call_dummy:
|
||
case bp_step_resume:
|
||
break;
|
||
}
|
||
|
||
return 0;
|
||
}
|
||
|
||
/* Re-set all breakpoints after symbols have been re-loaded. */
|
||
void
|
||
breakpoint_re_set (void)
|
||
{
|
||
struct breakpoint *b, *temp;
|
||
enum language save_language;
|
||
int save_input_radix;
|
||
|
||
save_language = current_language->la_language;
|
||
save_input_radix = input_radix;
|
||
ALL_BREAKPOINTS_SAFE (b, temp)
|
||
{
|
||
/* Format possible error msg */
|
||
char *message = xstrprintf ("Error in re-setting breakpoint %d:\n",
|
||
b->number);
|
||
struct cleanup *cleanups = make_cleanup (xfree, message);
|
||
catch_errors (breakpoint_re_set_one, b, message, RETURN_MASK_ALL);
|
||
do_cleanups (cleanups);
|
||
}
|
||
set_language (save_language);
|
||
input_radix = save_input_radix;
|
||
|
||
if (GET_LONGJMP_TARGET_P ())
|
||
{
|
||
create_longjmp_breakpoint ("longjmp");
|
||
create_longjmp_breakpoint ("_longjmp");
|
||
create_longjmp_breakpoint ("siglongjmp");
|
||
create_longjmp_breakpoint ("_siglongjmp");
|
||
create_longjmp_breakpoint (NULL);
|
||
}
|
||
|
||
create_overlay_event_breakpoint ("_ovly_debug_event");
|
||
}
|
||
|
||
/* Reset the thread number of this breakpoint:
|
||
|
||
- If the breakpoint is for all threads, leave it as-is.
|
||
- Else, reset it to the current thread for inferior_ptid. */
|
||
void
|
||
breakpoint_re_set_thread (struct breakpoint *b)
|
||
{
|
||
if (b->thread != -1)
|
||
{
|
||
if (in_thread_list (inferior_ptid))
|
||
b->thread = pid_to_thread_id (inferior_ptid);
|
||
}
|
||
}
|
||
|
||
/* Set ignore-count of breakpoint number BPTNUM to COUNT.
|
||
If from_tty is nonzero, it prints a message to that effect,
|
||
which ends with a period (no newline). */
|
||
|
||
void
|
||
set_ignore_count (int bptnum, int count, int from_tty)
|
||
{
|
||
struct breakpoint *b;
|
||
|
||
if (count < 0)
|
||
count = 0;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
if (b->number == bptnum)
|
||
{
|
||
b->ignore_count = count;
|
||
if (from_tty)
|
||
{
|
||
if (count == 0)
|
||
printf_filtered ("Will stop next time breakpoint %d is reached.",
|
||
bptnum);
|
||
else if (count == 1)
|
||
printf_filtered ("Will ignore next crossing of breakpoint %d.",
|
||
bptnum);
|
||
else
|
||
printf_filtered ("Will ignore next %d crossings of breakpoint %d.",
|
||
count, bptnum);
|
||
}
|
||
breakpoints_changed ();
|
||
breakpoint_modify_event (b->number);
|
||
return;
|
||
}
|
||
|
||
error ("No breakpoint number %d.", bptnum);
|
||
}
|
||
|
||
/* Clear the ignore counts of all breakpoints. */
|
||
void
|
||
breakpoint_clear_ignore_counts (void)
|
||
{
|
||
struct breakpoint *b;
|
||
|
||
ALL_BREAKPOINTS (b)
|
||
b->ignore_count = 0;
|
||
}
|
||
|
||
/* Command to set ignore-count of breakpoint N to COUNT. */
|
||
|
||
static void
|
||
ignore_command (char *args, int from_tty)
|
||
{
|
||
char *p = args;
|
||
int num;
|
||
|
||
if (p == 0)
|
||
error_no_arg ("a breakpoint number");
|
||
|
||
num = get_number (&p);
|
||
if (num == 0)
|
||
error ("bad breakpoint number: '%s'", args);
|
||
if (*p == 0)
|
||
error ("Second argument (specified ignore-count) is missing.");
|
||
|
||
set_ignore_count (num,
|
||
longest_to_int (value_as_long (parse_and_eval (p))),
|
||
from_tty);
|
||
if (from_tty)
|
||
printf_filtered ("\n");
|
||
}
|
||
|
||
/* Call FUNCTION on each of the breakpoints
|
||
whose numbers are given in ARGS. */
|
||
|
||
static void
|
||
map_breakpoint_numbers (char *args, void (*function) (struct breakpoint *))
|
||
{
|
||
char *p = args;
|
||
char *p1;
|
||
int num;
|
||
struct breakpoint *b, *tmp;
|
||
int match;
|
||
|
||
if (p == 0)
|
||
error_no_arg ("one or more breakpoint numbers");
|
||
|
||
while (*p)
|
||
{
|
||
match = 0;
|
||
p1 = p;
|
||
|
||
num = get_number_or_range (&p1);
|
||
if (num == 0)
|
||
{
|
||
warning ("bad breakpoint number at or near '%s'", p);
|
||
}
|
||
else
|
||
{
|
||
ALL_BREAKPOINTS_SAFE (b, tmp)
|
||
if (b->number == num)
|
||
{
|
||
struct breakpoint *related_breakpoint = b->related_breakpoint;
|
||
match = 1;
|
||
function (b);
|
||
if (related_breakpoint)
|
||
function (related_breakpoint);
|
||
break;
|
||
}
|
||
if (match == 0)
|
||
printf_unfiltered ("No breakpoint number %d.\n", num);
|
||
}
|
||
p = p1;
|
||
}
|
||
}
|
||
|
||
/* Set ignore-count of breakpoint number BPTNUM to COUNT.
|
||
If from_tty is nonzero, it prints a message to that effect,
|
||
which ends with a period (no newline). */
|
||
|
||
void
|
||
disable_breakpoint (struct breakpoint *bpt)
|
||
{
|
||
/* Never disable a watchpoint scope breakpoint; we want to
|
||
hit them when we leave scope so we can delete both the
|
||
watchpoint and its scope breakpoint at that time. */
|
||
if (bpt->type == bp_watchpoint_scope)
|
||
return;
|
||
|
||
/* You can't disable permanent breakpoints. */
|
||
if (bpt->enable_state == bp_permanent)
|
||
return;
|
||
|
||
bpt->enable_state = bp_disabled;
|
||
|
||
check_duplicates (bpt);
|
||
|
||
if (modify_breakpoint_hook)
|
||
modify_breakpoint_hook (bpt);
|
||
breakpoint_modify_event (bpt->number);
|
||
}
|
||
|
||
static void
|
||
disable_command (char *args, int from_tty)
|
||
{
|
||
struct breakpoint *bpt;
|
||
if (args == 0)
|
||
ALL_BREAKPOINTS (bpt)
|
||
switch (bpt->type)
|
||
{
|
||
case bp_none:
|
||
warning ("attempted to disable apparently deleted breakpoint #%d?",
|
||
bpt->number);
|
||
continue;
|
||
case bp_breakpoint:
|
||
case bp_catch_load:
|
||
case bp_catch_unload:
|
||
case bp_catch_fork:
|
||
case bp_catch_vfork:
|
||
case bp_catch_exec:
|
||
case bp_catch_catch:
|
||
case bp_catch_throw:
|
||
case bp_hardware_breakpoint:
|
||
case bp_watchpoint:
|
||
case bp_hardware_watchpoint:
|
||
case bp_read_watchpoint:
|
||
case bp_access_watchpoint:
|
||
disable_breakpoint (bpt);
|
||
default:
|
||
continue;
|
||
}
|
||
else
|
||
map_breakpoint_numbers (args, disable_breakpoint);
|
||
}
|
||
|
||
static void
|
||
do_enable_breakpoint (struct breakpoint *bpt, enum bpdisp disposition)
|
||
{
|
||
struct frame_info *save_selected_frame = NULL;
|
||
int save_selected_frame_level = -1;
|
||
int target_resources_ok, other_type_used;
|
||
struct value *mark;
|
||
|
||
if (bpt->type == bp_hardware_breakpoint)
|
||
{
|
||
int i;
|
||
i = hw_breakpoint_used_count ();
|
||
target_resources_ok =
|
||
TARGET_CAN_USE_HARDWARE_WATCHPOINT (bp_hardware_breakpoint,
|
||
i + 1, 0);
|
||
if (target_resources_ok == 0)
|
||
error ("No hardware breakpoint support in the target.");
|
||
else if (target_resources_ok < 0)
|
||
error ("Hardware breakpoints used exceeds limit.");
|
||
}
|
||
|
||
if (bpt->enable_state != bp_permanent)
|
||
bpt->enable_state = bp_enabled;
|
||
bpt->disposition = disposition;
|
||
check_duplicates (bpt);
|
||
breakpoints_changed ();
|
||
|
||
if (bpt->type == bp_watchpoint ||
|
||
bpt->type == bp_hardware_watchpoint ||
|
||
bpt->type == bp_read_watchpoint ||
|
||
bpt->type == bp_access_watchpoint)
|
||
{
|
||
if (bpt->exp_valid_block != NULL)
|
||
{
|
||
struct frame_info *fr =
|
||
fr = frame_find_by_id (bpt->watchpoint_frame);
|
||
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_state = bp_disabled;
|
||
return;
|
||
}
|
||
|
||
save_selected_frame = deprecated_selected_frame;
|
||
save_selected_frame_level = frame_relative_level (deprecated_selected_frame);
|
||
select_frame (fr);
|
||
}
|
||
|
||
value_free (bpt->val);
|
||
mark = value_mark ();
|
||
bpt->val = evaluate_expression (bpt->exp);
|
||
release_value (bpt->val);
|
||
if (VALUE_LAZY (bpt->val))
|
||
value_fetch_lazy (bpt->val);
|
||
|
||
if (bpt->type == bp_hardware_watchpoint ||
|
||
bpt->type == bp_read_watchpoint ||
|
||
bpt->type == bp_access_watchpoint)
|
||
{
|
||
int i = hw_watchpoint_used_count (bpt->type, &other_type_used);
|
||
int mem_cnt = can_use_hardware_watchpoint (bpt->val);
|
||
|
||
/* Hack around 'unused var' error for some targets here */
|
||
(void) mem_cnt, i;
|
||
target_resources_ok = TARGET_CAN_USE_HARDWARE_WATCHPOINT (
|
||
bpt->type, i + mem_cnt, other_type_used);
|
||
/* we can consider of type is bp_hardware_watchpoint, convert to
|
||
bp_watchpoint in the following condition */
|
||
if (target_resources_ok < 0)
|
||
{
|
||
printf_filtered ("\
|
||
Cannot enable watchpoint %d because target watch resources\n\
|
||
have been allocated for other watchpoints.\n", bpt->number);
|
||
bpt->enable_state = bp_disabled;
|
||
value_free_to_mark (mark);
|
||
return;
|
||
}
|
||
}
|
||
|
||
if (save_selected_frame_level >= 0)
|
||
select_frame (save_selected_frame);
|
||
value_free_to_mark (mark);
|
||
}
|
||
if (modify_breakpoint_hook)
|
||
modify_breakpoint_hook (bpt);
|
||
breakpoint_modify_event (bpt->number);
|
||
}
|
||
|
||
void
|
||
enable_breakpoint (struct breakpoint *bpt)
|
||
{
|
||
do_enable_breakpoint (bpt, bpt->disposition);
|
||
}
|
||
|
||
/* The enable command enables the specified breakpoints (or all defined
|
||
breakpoints) so they once again become (or continue to be) effective
|
||
in stopping the inferior. */
|
||
|
||
static void
|
||
enable_command (char *args, int from_tty)
|
||
{
|
||
struct breakpoint *bpt;
|
||
if (args == 0)
|
||
ALL_BREAKPOINTS (bpt)
|
||
switch (bpt->type)
|
||
{
|
||
case bp_none:
|
||
warning ("attempted to enable apparently deleted breakpoint #%d?",
|
||
bpt->number);
|
||
continue;
|
||
case bp_breakpoint:
|
||
case bp_catch_load:
|
||
case bp_catch_unload:
|
||
case bp_catch_fork:
|
||
case bp_catch_vfork:
|
||
case bp_catch_exec:
|
||
case bp_catch_catch:
|
||
case bp_catch_throw:
|
||
case bp_hardware_breakpoint:
|
||
case bp_watchpoint:
|
||
case bp_hardware_watchpoint:
|
||
case bp_read_watchpoint:
|
||
case bp_access_watchpoint:
|
||
enable_breakpoint (bpt);
|
||
default:
|
||
continue;
|
||
}
|
||
else
|
||
map_breakpoint_numbers (args, enable_breakpoint);
|
||
}
|
||
|
||
static void
|
||
enable_once_breakpoint (struct breakpoint *bpt)
|
||
{
|
||
do_enable_breakpoint (bpt, disp_disable);
|
||
}
|
||
|
||
static void
|
||
enable_once_command (char *args, int from_tty)
|
||
{
|
||
map_breakpoint_numbers (args, enable_once_breakpoint);
|
||
}
|
||
|
||
static void
|
||
enable_delete_breakpoint (struct breakpoint *bpt)
|
||
{
|
||
do_enable_breakpoint (bpt, disp_del);
|
||
}
|
||
|
||
static void
|
||
enable_delete_command (char *args, int from_tty)
|
||
{
|
||
map_breakpoint_numbers (args, enable_delete_breakpoint);
|
||
}
|
||
|
||
/* Use default_breakpoint_'s, or nothing if they aren't valid. */
|
||
|
||
struct symtabs_and_lines
|
||
decode_line_spec_1 (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;
|
||
}
|
||
|
||
void
|
||
_initialize_breakpoint (void)
|
||
{
|
||
struct cmd_list_element *c;
|
||
|
||
breakpoint_chain = 0;
|
||
/* Don't bother to call set_breakpoint_count. $bpnum isn't useful
|
||
before a breakpoint is set. */
|
||
breakpoint_count = 0;
|
||
|
||
add_com ("ignore", class_breakpoint, ignore_command,
|
||
"Set ignore-count of breakpoint number N to COUNT.\n\
|
||
Usage is `ignore N COUNT'.");
|
||
if (xdb_commands)
|
||
add_com_alias ("bc", "ignore", class_breakpoint, 1);
|
||
|
||
add_com ("commands", class_breakpoint, commands_command,
|
||
"Set commands to be executed when a breakpoint is hit.\n\
|
||
Give breakpoint number as argument after \"commands\".\n\
|
||
With no argument, the targeted breakpoint is the last one set.\n\
|
||
The commands themselves follow starting on the next line.\n\
|
||
Type a line containing \"end\" to indicate the end of them.\n\
|
||
Give \"silent\" as the first line to make the breakpoint silent;\n\
|
||
then no output is printed when it is hit, except what the commands print.");
|
||
|
||
add_com ("condition", class_breakpoint, condition_command,
|
||
"Specify breakpoint number N to break only if COND is true.\n\
|
||
Usage is `condition N COND', where N is an integer and COND is an\n\
|
||
expression to be evaluated whenever breakpoint N is reached.");
|
||
|
||
c = add_com ("tbreak", class_breakpoint, tbreak_command,
|
||
"Set a temporary breakpoint. Args like \"break\" command.\n\
|
||
Like \"break\" except the breakpoint is only temporary,\n\
|
||
so it will be deleted when hit. Equivalent to \"break\" followed\n\
|
||
by using \"enable delete\" on the breakpoint number.");
|
||
set_cmd_completer (c, location_completer);
|
||
|
||
c = add_com ("hbreak", class_breakpoint, hbreak_command,
|
||
"Set a hardware assisted breakpoint. Args like \"break\" command.\n\
|
||
Like \"break\" except the breakpoint requires hardware support,\n\
|
||
some target hardware may not have this support.");
|
||
set_cmd_completer (c, location_completer);
|
||
|
||
c = add_com ("thbreak", class_breakpoint, thbreak_command,
|
||
"Set a temporary hardware assisted breakpoint. Args like \"break\" command.\n\
|
||
Like \"hbreak\" except the breakpoint is only temporary,\n\
|
||
so it will be deleted when hit.");
|
||
set_cmd_completer (c, location_completer);
|
||
|
||
add_prefix_cmd ("enable", class_breakpoint, enable_command,
|
||
"Enable some breakpoints.\n\
|
||
Give breakpoint numbers (separated by spaces) as arguments.\n\
|
||
With no subcommand, breakpoints are enabled until you command otherwise.\n\
|
||
This is used to cancel the effect of the \"disable\" command.\n\
|
||
With a subcommand you can enable temporarily.",
|
||
&enablelist, "enable ", 1, &cmdlist);
|
||
if (xdb_commands)
|
||
add_com ("ab", class_breakpoint, enable_command,
|
||
"Enable some breakpoints.\n\
|
||
Give breakpoint numbers (separated by spaces) as arguments.\n\
|
||
With no subcommand, breakpoints are enabled until you command otherwise.\n\
|
||
This is used to cancel the effect of the \"disable\" command.\n\
|
||
With a subcommand you can enable temporarily.");
|
||
|
||
add_com_alias ("en", "enable", class_breakpoint, 1);
|
||
|
||
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.",
|
||
&enablebreaklist);
|
||
|
||
add_cmd ("delete", no_class, enable_delete_command,
|
||
"Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
|
||
If a breakpoint is hit while enabled in this fashion, it is deleted.",
|
||
&enablebreaklist);
|
||
|
||
add_cmd ("delete", no_class, enable_delete_command,
|
||
"Enable breakpoints and delete when hit. Give breakpoint numbers.\n\
|
||
If a breakpoint is hit while enabled in this fashion, it is deleted.",
|
||
&enablelist);
|
||
|
||
add_cmd ("once", no_class, enable_once_command,
|
||
"Enable breakpoints for one hit. Give breakpoint numbers.\n\
|
||
If a breakpoint is hit while enabled in this fashion, it becomes disabled.",
|
||
&enablelist);
|
||
|
||
add_prefix_cmd ("disable", class_breakpoint, disable_command,
|
||
"Disable some breakpoints.\n\
|
||
Arguments are breakpoint numbers with spaces in between.\n\
|
||
To disable all breakpoints, give no argument.\n\
|
||
A disabled breakpoint is not forgotten, but has no effect until reenabled.",
|
||
&disablelist, "disable ", 1, &cmdlist);
|
||
add_com_alias ("dis", "disable", class_breakpoint, 1);
|
||
add_com_alias ("disa", "disable", class_breakpoint, 1);
|
||
if (xdb_commands)
|
||
add_com ("sb", 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.");
|
||
|
||
add_cmd ("breakpoints", class_alias, disable_command,
|
||
"Disable some breakpoints.\n\
|
||
Arguments are breakpoint numbers with spaces in between.\n\
|
||
To disable all breakpoints, give no argument.\n\
|
||
A disabled breakpoint is not forgotten, but has no effect until reenabled.\n\
|
||
This command may be abbreviated \"disable\".",
|
||
&disablelist);
|
||
|
||
add_prefix_cmd ("delete", class_breakpoint, delete_command,
|
||
"Delete some breakpoints or auto-display expressions.\n\
|
||
Arguments are breakpoint numbers with spaces in between.\n\
|
||
To delete all breakpoints, give no argument.\n\
|
||
\n\
|
||
Also a prefix command for deletion of other GDB objects.\n\
|
||
The \"unset\" command is also an alias for \"delete\".",
|
||
&deletelist, "delete ", 1, &cmdlist);
|
||
add_com_alias ("d", "delete", class_breakpoint, 1);
|
||
if (xdb_commands)
|
||
add_com ("db", class_breakpoint, delete_command,
|
||
"Delete some breakpoints.\n\
|
||
Arguments are breakpoint numbers with spaces in between.\n\
|
||
To delete all breakpoints, give no argument.\n");
|
||
|
||
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,
|
||
concat ("Clear breakpoint at specified line or function.\n\
|
||
Argument may be line number, function name, or \"*\" and an address.\n\
|
||
If line number is specified, all breakpoints in that line are cleared.\n\
|
||
If function is specified, breakpoints at beginning of function are cleared.\n\
|
||
If an address is specified, breakpoints at that address are cleared.\n\n",
|
||
"With no argument, clears all breakpoints in the line that the selected frame\n\
|
||
is executing in.\n\
|
||
\n\
|
||
See also the \"delete\" command which clears breakpoints by number.", NULL));
|
||
|
||
c = add_com ("break", class_breakpoint, break_command,
|
||
concat ("Set breakpoint at specified line or function.\n\
|
||
Argument may be line number, function name, or \"*\" and an address.\n\
|
||
If line number is specified, break at start of code for that line.\n\
|
||
If function is specified, break at start of code for that function.\n\
|
||
If an address is specified, break at that exact address.\n",
|
||
"With no arg, uses current execution address of selected stack frame.\n\
|
||
This is useful for breaking on return to a stack frame.\n\
|
||
\n\
|
||
Multiple breakpoints at one place are permitted, and useful if conditional.\n\
|
||
\n\
|
||
Do \"help breakpoints\" for info on other commands dealing with breakpoints.", NULL));
|
||
set_cmd_completer (c, location_completer);
|
||
|
||
add_com_alias ("b", "break", class_run, 1);
|
||
add_com_alias ("br", "break", class_run, 1);
|
||
add_com_alias ("bre", "break", class_run, 1);
|
||
add_com_alias ("brea", "break", class_run, 1);
|
||
|
||
if (xdb_commands)
|
||
{
|
||
add_com_alias ("ba", "break", class_breakpoint, 1);
|
||
add_com_alias ("bu", "ubreak", class_breakpoint, 1);
|
||
}
|
||
|
||
if (dbx_commands)
|
||
{
|
||
add_abbrev_prefix_cmd ("stop", class_breakpoint, stop_command,
|
||
"Break in function/address or break at a line in the current file.",
|
||
&stoplist, "stop ", 1, &cmdlist);
|
||
add_cmd ("in", class_breakpoint, stopin_command,
|
||
"Break in function or address.\n", &stoplist);
|
||
add_cmd ("at", class_breakpoint, stopat_command,
|
||
"Break at a line in the current file.\n", &stoplist);
|
||
add_com ("status", class_info, breakpoints_info,
|
||
concat ("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 \"$bpnum\" contains the number of the last\n\
|
||
breakpoint set.", NULL));
|
||
}
|
||
|
||
add_info ("breakpoints", breakpoints_info,
|
||
concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
|
||
The \"Type\" column indicates one of:\n\
|
||
\tbreakpoint - normal breakpoint\n\
|
||
\twatchpoint - watchpoint\n\
|
||
The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
|
||
the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
|
||
breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
|
||
address and file/line number respectively.\n\n",
|
||
"Convenience variable \"$_\" and default examine address for \"x\"\n\
|
||
are set to the address of the last breakpoint listed.\n\n\
|
||
Convenience variable \"$bpnum\" contains the number of the last\n\
|
||
breakpoint set.", NULL));
|
||
|
||
if (xdb_commands)
|
||
add_com ("lb", class_breakpoint, breakpoints_info,
|
||
concat ("Status of user-settable breakpoints, or breakpoint number NUMBER.\n\
|
||
The \"Type\" column indicates one of:\n\
|
||
\tbreakpoint - normal breakpoint\n\
|
||
\twatchpoint - watchpoint\n\
|
||
The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
|
||
the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
|
||
breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
|
||
address and file/line number respectively.\n\n",
|
||
"Convenience variable \"$_\" and default examine address for \"x\"\n\
|
||
are set to the address of the last breakpoint listed.\n\n\
|
||
Convenience variable \"$bpnum\" contains the number of the last\n\
|
||
breakpoint set.", NULL));
|
||
|
||
add_cmd ("breakpoints", class_maintenance, maintenance_info_breakpoints,
|
||
concat ("Status of all breakpoints, or breakpoint number NUMBER.\n\
|
||
The \"Type\" column indicates one of:\n\
|
||
\tbreakpoint - normal breakpoint\n\
|
||
\twatchpoint - watchpoint\n\
|
||
\tlongjmp - internal breakpoint used to step through longjmp()\n\
|
||
\tlongjmp resume - internal breakpoint at the target of longjmp()\n\
|
||
\tuntil - internal breakpoint used by the \"until\" command\n\
|
||
\tfinish - internal breakpoint used by the \"finish\" command\n",
|
||
"The \"Disp\" column contains one of \"keep\", \"del\", or \"dis\" to indicate\n\
|
||
the disposition of the breakpoint after it gets hit. \"dis\" means that the\n\
|
||
breakpoint will be disabled. The \"Address\" and \"What\" columns indicate the\n\
|
||
address and file/line number respectively.\n\n",
|
||
"Convenience variable \"$_\" 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.", NULL),
|
||
&maintenanceinfolist);
|
||
|
||
add_com ("catch", class_breakpoint, catch_command,
|
||
"Set catchpoints to catch events.\n\
|
||
Raised signals may be caught:\n\
|
||
\tcatch signal - all signals\n\
|
||
\tcatch signal <signame> - a particular signal\n\
|
||
Raised exceptions may be caught:\n\
|
||
\tcatch throw - all exceptions, when thrown\n\
|
||
\tcatch throw <exceptname> - a particular exception, when thrown\n\
|
||
\tcatch catch - all exceptions, when caught\n\
|
||
\tcatch catch <exceptname> - a particular exception, when caught\n\
|
||
Thread or process events may be caught:\n\
|
||
\tcatch thread_start - any threads, just after creation\n\
|
||
\tcatch thread_exit - any threads, just before expiration\n\
|
||
\tcatch thread_join - any threads, just after joins\n\
|
||
Process events may be caught:\n\
|
||
\tcatch start - any processes, just after creation\n\
|
||
\tcatch exit - any processes, just before expiration\n\
|
||
\tcatch fork - calls to fork()\n\
|
||
\tcatch vfork - calls to vfork()\n\
|
||
\tcatch exec - calls to exec()\n\
|
||
Dynamically-linked library events may be caught:\n\
|
||
\tcatch load - loads of any library\n\
|
||
\tcatch load <libname> - loads of a particular library\n\
|
||
\tcatch unload - unloads of any library\n\
|
||
\tcatch unload <libname> - unloads of a particular library\n\
|
||
The act of your program's execution stopping may also be caught:\n\
|
||
\tcatch stop\n\n\
|
||
C++ exceptions may be caught:\n\
|
||
\tcatch throw - all exceptions, when thrown\n\
|
||
\tcatch catch - all exceptions, when caught\n\
|
||
\n\
|
||
Do \"help set follow-fork-mode\" for info on debugging your program\n\
|
||
after a fork or vfork is caught.\n\n\
|
||
Do \"help breakpoints\" for info on other commands dealing with breakpoints.");
|
||
|
||
add_com ("tcatch", class_breakpoint, tcatch_command,
|
||
"Set temporary catchpoints to catch events.\n\
|
||
Args like \"catch\" command.\n\
|
||
Like \"catch\" except the catchpoint is only temporary,\n\
|
||
so it will be deleted when hit. Equivalent to \"catch\" followed\n\
|
||
by using \"enable delete\" on the catchpoint number.");
|
||
|
||
c = 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.");
|
||
set_cmd_completer (c, location_completer);
|
||
|
||
c = add_com ("rwatch", class_breakpoint, rwatch_command,
|
||
"Set a read watchpoint for an expression.\n\
|
||
A watchpoint stops execution of your program whenever the value of\n\
|
||
an expression is read.");
|
||
set_cmd_completer (c, location_completer);
|
||
|
||
c = add_com ("awatch", class_breakpoint, awatch_command,
|
||
"Set a watchpoint for an expression.\n\
|
||
A watchpoint stops execution of your program whenever the value of\n\
|
||
an expression is either read or written.");
|
||
set_cmd_completer (c, location_completer);
|
||
|
||
add_info ("watchpoints", breakpoints_info,
|
||
"Synonym for ``info breakpoints''.");
|
||
|
||
|
||
c = add_set_cmd ("can-use-hw-watchpoints", class_support, var_zinteger,
|
||
(char *) &can_use_hw_watchpoints,
|
||
"Set debugger's willingness to use watchpoint hardware.\n\
|
||
If zero, gdb will not use hardware for new watchpoints, even if\n\
|
||
such is available. (However, any hardware watchpoints that were\n\
|
||
created before setting this to nonzero, will continue to use watchpoint\n\
|
||
hardware.)",
|
||
&setlist);
|
||
add_show_from_set (c, &showlist);
|
||
|
||
can_use_hw_watchpoints = 1;
|
||
}
|