/* Everything about breakpoints, for GDB.
- Copyright 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994,
- 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005
+ Copyright (C) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
+ 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
Free Software Foundation, Inc.
This file is part of GDB.
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. */
+ Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
#include "defs.h"
#include <ctype.h>
#include "solist.h"
#include "observer.h"
#include "exceptions.h"
+#include "memattr.h"
+#include "ada-lang.h"
#include "gdb-events.h"
#include "mi/mi-common.h"
static CORE_ADDR adjust_breakpoint_address (CORE_ADDR bpaddr,
enum bptype bptype);
-static void describe_other_breakpoints (CORE_ADDR, asection *);
+static void describe_other_breakpoints (CORE_ADDR, asection *, int);
static void breakpoints_info (char *, int);
static void ep_skip_leading_whitespace (char **s);
+static int single_step_breakpoint_inserted_here_p (CORE_ADDR pc);
+
/* Prototypes for exported functions. */
/* If FALSE, gdb will not use hardware support for watchpoints, even
value);
}
+/* If 1, gdb will automatically use hardware breakpoints for breakpoints
+ set with "break" but falling in read-only memory.
+ If 0, gdb will warn about such breakpoints, but won't automatically
+ use hardware breakpoints. */
+static int automatic_hardware_breakpoints;
+static void
+show_automatic_hardware_breakpoints (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c,
+ const char *value)
+{
+ fprintf_filtered (file, _("\
+Automatic usage of hardware breakpoints is %s.\n"),
+ value);
+}
+
+
void _initialize_breakpoint (void);
extern int addressprint; /* Print machine addresses? */
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").
+
+ If the string is a NULL pointer, that denotes the last breakpoint.
TRAILER is a character which can be found after the number; most
commonly this is `-'. If you don't want a trailer, use \0. */
}
error (_("No breakpoint number %d."), bnum);
}
+
+/* Like commands_command, but instead of reading the commands from
+ input stream, takes them from an already parsed command structure.
+
+ This is used by cli-script.c to DTRT with breakpoint commands
+ that are part of if and while bodies. */
+enum command_control_type
+commands_from_control_command (char *arg, struct command_line *cmd)
+{
+ struct breakpoint *b;
+ char *p;
+ int bnum;
+
+ /* 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."));
+
+ /* An empty string for the breakpoint number means the last
+ breakpoint, but get_number expects a NULL pointer. */
+ if (arg && !*arg)
+ p = NULL;
+ else
+ p = arg;
+ bnum = get_number (&p);
+
+ if (p && *p)
+ error (_("Unexpected extra arguments following breakpoint number."));
+
+ ALL_BREAKPOINTS (b)
+ if (b->number == bnum)
+ {
+ free_command_lines (&b->commands);
+ if (cmd->body_count != 1)
+ error (_("Invalid \"commands\" block structure."));
+ /* We need to copy the commands because if/while will free the
+ list after it finishes execution. */
+ b->commands = copy_command_lines (cmd->body_list[0]);
+ breakpoints_changed ();
+ breakpoint_modify_event (b->number);
+ return simple_control;
+ }
+ error (_("No breakpoint number %d."), bnum);
+}
\f
/* Like target_read_memory() but if breakpoints are inserted, return
the shadow contents instead of the breakpoints themselves.
shadow contents, not the breakpoints themselves. From breakpoint.c. */
int
-deprecated_read_memory_nobpt (CORE_ADDR memaddr, gdb_byte *myaddr,
- unsigned len)
+read_memory_nobpt (CORE_ADDR memaddr, gdb_byte *myaddr, unsigned len)
{
int status;
struct bp_location *b;
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;
+ bp_addr = b->target_info.placed_address;
+ bp_size = b->target_info.shadow_len;
if (bp_size == 0)
- /* bp isn't valid */
+ /* bp isn't valid, or doesn't shadow memory. */
continue;
if (bp_addr + bp_size <= memaddr)
/* The breakpoint is entirely before the chunk of memory we
}
memcpy (myaddr + bp_addr - memaddr,
- b->shadow_contents + bptoffset, bp_size);
+ b->target_info.shadow_contents + bptoffset, bp_size);
if (bp_addr > memaddr)
{
/* Copy the section of memory before the breakpoint. */
- status = deprecated_read_memory_nobpt (memaddr, myaddr, bp_addr - memaddr);
+ 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 = deprecated_read_memory_nobpt (bp_addr + bp_size,
+ status = read_memory_nobpt (bp_addr + bp_size,
myaddr + bp_addr + bp_size - memaddr,
memaddr + len - (bp_addr + bp_size));
if (status != 0)
/* Helper routine: free the value chain for a breakpoint (watchpoint). */
-static void free_valchain (struct bp_location *b)
+static void
+free_valchain (struct bp_location *b)
{
struct value *v;
struct value *n;
if (bpt->inserted || bpt->duplicate)
return 0;
+ /* Initialize the target-specific information. */
+ memset (&bpt->target_info, 0, sizeof (bpt->target_info));
+ bpt->target_info.placed_address = bpt->address;
+
if (bpt->loc_type == bp_loc_software_breakpoint
|| bpt->loc_type == bp_loc_hardware_breakpoint)
{
+ if (bpt->owner->type != bp_hardware_breakpoint)
+ {
+ /* If the explicitly specified breakpoint type
+ is not hardware breakpoint, check the memory map to see
+ if the breakpoint address is in read only memory or not.
+ Two important cases are:
+ - location type is not hardware breakpoint, memory
+ is readonly. We change the type of the location to
+ hardware breakpoint.
+ - location type is hardware breakpoint, memory is read-write.
+ This means we've previously made the location hardware one, but
+ then the memory map changed, so we undo.
+
+ When breakpoints are removed, remove_breakpoints will
+ use location types we've just set here, the only possible
+ problem is that memory map has changed during running program,
+ but it's not going to work anyway with current gdb. */
+ struct mem_region *mr
+ = lookup_mem_region (bpt->target_info.placed_address);
+
+ if (mr)
+ {
+ if (automatic_hardware_breakpoints)
+ {
+ int changed = 0;
+ enum bp_loc_type new_type;
+
+ if (mr->attrib.mode != MEM_RW)
+ new_type = bp_loc_hardware_breakpoint;
+ else
+ new_type = bp_loc_software_breakpoint;
+
+ if (new_type != bpt->loc_type)
+ {
+ static int said = 0;
+ bpt->loc_type = new_type;
+ if (!said)
+ {
+ fprintf_filtered (gdb_stdout, _("\
+Note: automatically using hardware breakpoints for read-only addresses.\n"));
+ said = 1;
+ }
+ }
+ }
+ else if (bpt->loc_type == bp_loc_software_breakpoint
+ && mr->attrib.mode != MEM_RW)
+ warning (_("cannot set software breakpoint at readonly address %s"),
+ paddr (bpt->address));
+ }
+ }
+
/* First check to see if we have to handle an overlay. */
if (overlay_debugging == ovly_off
|| bpt->section == NULL
/* No overlay handling: just set the breakpoint. */
if (bpt->loc_type == bp_loc_hardware_breakpoint)
- val = target_insert_hw_breakpoint (bpt->address,
- bpt->shadow_contents);
+ val = target_insert_hw_breakpoint (&bpt->target_info);
else
- val = target_insert_breakpoint (bpt->address,
- bpt->shadow_contents);
+ val = target_insert_breakpoint (&bpt->target_info);
}
else
{
CORE_ADDR addr = overlay_unmapped_address (bpt->address,
bpt->section);
/* Set a software (trap) breakpoint at the LMA. */
- val = target_insert_breakpoint (addr, bpt->shadow_contents);
+ bpt->overlay_target_info = bpt->target_info;
+ bpt->overlay_target_info.placed_address = addr;
+ val = target_insert_breakpoint (&bpt->overlay_target_info);
if (val != 0)
fprintf_unfiltered (tmp_error_stream,
"Overlay breakpoint %d failed: in ROM?",
{
/* Yes. This overlay section is mapped into memory. */
if (bpt->loc_type == bp_loc_hardware_breakpoint)
- val = target_insert_hw_breakpoint (bpt->address,
- bpt->shadow_contents);
+ val = target_insert_hw_breakpoint (&bpt->target_info);
else
- val = target_insert_breakpoint (bpt->address,
- bpt->shadow_contents);
+ val = target_insert_breakpoint (&bpt->target_info);
}
else
{
/* FIXME drow/2003-09-09: It would be nice if evaluate_expression
took a frame parameter, so that we didn't have to change the
selected frame. */
- saved_frame_id = get_frame_id (deprecated_selected_frame);
+ saved_frame_id = get_frame_id (get_selected_frame (NULL));
/* Determine if the watchpoint is within scope. */
if (bpt->owner->exp_valid_block == NULL)
/* 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 (bpt->address, bpt->shadow_contents);
+ val = target_insert_breakpoint (&bpt->target_info);
if (val)
{
/* Couldn't set breakpoint for some reason */
if (!breakpoint_enabled (b->owner))
continue;
+ /* There is no point inserting thread-specific breakpoints if the
+ thread no longer exists. */
+ if (b->owner->thread != -1
+ && !valid_thread_id (b->owner->thread))
+ continue;
+
/* FIXME drow/2003-10-07: This code should be pushed elsewhere when
hardware watchpoints are split into multiple loc breakpoints. */
if ((b->loc_type == bp_loc_hardware_watchpoint
if (b->inserted)
{
remove_breakpoint (b, mark_inserted);
+ /* Note: since we insert a breakpoint right after removing,
+ any decisions about automatically using hardware breakpoints
+ made in insert_bp_location are preserved. */
if (b->loc_type == bp_loc_hardware_breakpoint)
- val = target_insert_hw_breakpoint (b->address, b->shadow_contents);
+ val = target_insert_hw_breakpoint (&b->target_info);
else
- val = target_insert_breakpoint (b->address, b->shadow_contents);
+ val = target_insert_breakpoint (&b->target_info);
/* FIXME drow/2003-10-07: This doesn't handle any other kinds of
breakpoints. It's wrong for watchpoints, for example. */
if (val != 0)
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))
{
(b->type == bp_catch_vfork) ||
(b->type == bp_catch_fork))
{
- b->loc->address = (CORE_ADDR) NULL;
+ b->loc->address = (CORE_ADDR) 0;
continue;
}
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->loc->address = (CORE_ADDR) NULL;
+ b->loc->address = (CORE_ADDR) 0;
}
/* FIXME what about longjmp breakpoints? Re-create them here? */
create_overlay_event_breakpoint ("_ovly_debug_event");
/* No overlay handling: just remove the breakpoint. */
if (b->loc_type == bp_loc_hardware_breakpoint)
- val = target_remove_hw_breakpoint (b->address,
- b->shadow_contents);
+ val = target_remove_hw_breakpoint (&b->target_info);
else
- val = target_remove_breakpoint (b->address, b->shadow_contents);
+ val = target_remove_breakpoint (&b->target_info);
}
else
{
/* 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->loc_type == bp_loc_hardware_breakpoint)
- target_remove_hw_breakpoint (addr, b->shadow_contents);
+ target_remove_hw_breakpoint (&b->overlay_target_info);
else
- target_remove_breakpoint (addr, b->shadow_contents);
+ target_remove_breakpoint (&b->overlay_target_info);
}
/* Did we set a breakpoint at the VMA?
If so, we will have marked the breakpoint 'inserted'. */
unmapped, but let's not rely on that being safe. We
don't know what the overlay manager might do. */
if (b->loc_type == bp_loc_hardware_breakpoint)
- val = target_remove_hw_breakpoint (b->address,
- b->shadow_contents);
+ val = target_remove_hw_breakpoint (&b->target_info);
+
+ /* However, we should remove *software* breakpoints only
+ if the section is still mapped, or else we overwrite
+ wrong code with the saved shadow contents. */
+ else if (section_is_mapped (b->section))
+ val = target_remove_breakpoint (&b->target_info);
else
- val = target_remove_breakpoint (b->address,
- b->shadow_contents);
+ val = 0;
}
else
{
&& breakpoint_enabled (b->owner)
&& !b->duplicate)
{
-
- val = target_remove_breakpoint (b->address, b->shadow_contents);
+ val = target_remove_breakpoint (&b->target_info);
if (val)
return val;
b->inserted = (is == mark_inserted);
}
- else if (ep_is_exception_catchpoint (b->owner)
- && b->inserted /* sometimes previous insert doesn't happen */
- && breakpoint_enabled (b->owner)
- && !b->duplicate)
- {
-
- val = target_remove_breakpoint (b->address, b->shadow_contents);
- if (val)
- return val;
-
- b->inserted = (is == mark_inserted);
- }
return 0;
}
}
}
+ /* Also check for software single-step breakpoints. */
+ if (single_step_breakpoint_inserted_here_p (pc))
+ return 1;
+
return 0;
}
}
}
+ /* Also check for software single-step breakpoints. */
+ if (single_step_breakpoint_inserted_here_p (pc))
+ return 1;
+
return 0;
}
}
-/* Return the breakpoint number of the first breakpoint we are stopped
+/* Put in *NUM 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. */
+ Return 0 if passed a bpstat which does not indicate any breakpoints.
+ Return -1 if stopped at a breakpoint that has been deleted since
+ we set it.
+ Return 1 otherwise. */
int
-bpstat_num (bpstat *bsp)
+bpstat_num (bpstat *bsp, int *num)
{
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 */
- }
+
+ b = (*bsp)->breakpoint_at;
+ *bsp = (*bsp)->next;
+ if (b == NULL)
+ return -1; /* breakpoint that's been deleted since */
+
+ *num = b->number; /* We have its number */
+ return 1;
}
/* Modify BS so that the actions will not be performed. */
case bp_until:
if (ui_out_is_mi_like_p (uiout))
- ui_out_field_string (uiout, "reason", "location-reached");
+ ui_out_field_string
+ (uiout, "reason",
+ async_reason_lookup (EXEC_ASYNC_LOCATION_REACHED));
return PRINT_UNKNOWN;
break;
case bp_longjmp:
case bp_longjmp_resume:
case bp_step_resume:
- case bp_through_sigtramp:
case bp_watchpoint_scope:
case bp_call_dummy:
default:
reinit_frame_cache ();
fr = frame_find_by_id (b->watchpoint_frame);
within_current_scope = (fr != NULL);
+
+ /* If we've gotten confused in the unwinder, we might have
+ returned a frame that can't describe this variable. */
+ if (within_current_scope
+ && block_function (b->exp_valid_block) != get_frame_function (fr))
+ within_current_scope = 0;
+
/* 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
/* 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,
#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
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 <
+ kc < clr sgl shl shlr slr sn sr ss
+ sgl < clrs shl shlr slr sn sr ss
+ slr < err shl shlr sn sr ss
+ clr < clrs err shl shlr sn sr ss
+ clrs < err shl shlr sn sr ss
+ ss < shl shlr sn sr
+ sn < shl shlr sr
+ shl < shlr sr
+ shlr < sr
+ sr <
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,
/* step_resume entries: a step resume breakpoint overrides another
breakpoint of signal handling (see comment in wait_for_inferior
at 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
+ /* kc ss sn sgl slr clr clrs sr shl shlr
*/
/*no_effect */
- {kc, ss, sn, sgl, slr, clr, clrs, sr, ts, shl, shlr},
+ {kc, ss, sn, sgl, slr, clr, clrs, sr, shl, shlr},
/*wp_silent */
- {ss, ss, sn, ss, ss, ss, ss, sr, ts, shl, shlr},
+ {ss, ss, sn, ss, ss, ss, ss, sr, shl, shlr},
/*wp_noisy */
- {sn, sn, sn, sn, sn, sn, sn, sr, ts, shl, shlr},
+ {sn, sn, sn, sn, sn, sn, sn, sr, shl, shlr},
/*bp_nostop */
- {sgl, ss, sn, sgl, slr, clrs, clrs, sr, ts, shl, shlr},
+ {sgl, ss, sn, sgl, slr, clrs, clrs, sr, shl, shlr},
/*bp_silent */
- {ss, ss, sn, ss, ss, ss, ss, sr, ts, shl, shlr},
+ {ss, ss, sn, ss, ss, ss, ss, sr, shl, shlr},
/*bp_noisy */
- {sn, sn, sn, sn, sn, sn, sn, sr, ts, shl, shlr},
+ {sn, sn, sn, sn, sn, sn, sn, sr, shl, shlr},
/*long_jump */
- {slr, ss, sn, slr, slr, err, err, sr, ts, shl, shlr},
+ {slr, ss, sn, slr, slr, err, err, sr, shl, shlr},
/*long_resume */
- {clr, ss, sn, clrs, err, err, err, sr, ts, shl, shlr},
+ {clr, ss, sn, clrs, err, err, err, sr, 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},
+ {sr, sr, sr, sr, sr, sr, sr, sr, sr, sr},
/*shlib */
- {shl, shl, shl, shl, shl, shl, shl, shl, ts, shl, shlr},
+ {shl, shl, shl, shl, shl, shl, shl, sr, shl, shlr},
/*catch_shlib */
- {shlr, shlr, shlr, shlr, shlr, shlr, shlr, shlr, ts, shlr, shlr}
+ {shlr, shlr, shlr, shlr, shlr, shlr, shlr, sr, shlr, shlr}
};
#undef kc
/* 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;
{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"},
ui_out_field_int (uiout, "what", b->forked_inferior_pid);
ui_out_spaces (uiout, 1);
}
+ break;
case bp_catch_exec:
/* Field 4, the address, is omitted (which makes the columns
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:
}
ui_out_field_string (uiout, "file", b->source_file);
ui_out_text (uiout, ":");
+
+ if (ui_out_is_mi_like_p (uiout))
+ {
+ struct symtab_and_line sal = find_pc_line (b->loc->address, 0);
+ char *fullname = symtab_to_fullname (sal.symtab);
+
+ if (fullname)
+ ui_out_field_string (uiout, "fullname", fullname);
+ }
+
ui_out_field_int (uiout, "line", b->line_number);
}
else if (b->pending)
ui_out_text (uiout, "\n");
}
- if (b->cond)
+ if (b->cond && !ada_exception_catchpoint_p (b))
{
+ /* We do not print the condition for Ada exception catchpoints
+ because the condition is an internal implementation detail
+ that we do not want to expose to the user. */
annotate_field (7);
ui_out_text (uiout, "\tstop only if ");
print_expression (b->cond, stb->stream);
args.bnum = bnum;
/* For the moment we don't trust print_one_breakpoint() to not throw
an error. */
- return catch_exceptions_with_msg (uiout, do_captured_breakpoint_query, &args,
- error_message, RETURN_MASK_ALL);
+ if (catch_exceptions_with_msg (uiout, do_captured_breakpoint_query, &args,
+ error_message, RETURN_MASK_ALL) < 0)
+ return GDB_RC_FAIL;
+ else
+ return GDB_RC_OK;
}
/* Return non-zero if B is user settable (breakpoints, watchpoints,
/* Print a message describing any breakpoints set at PC. */
static void
-describe_other_breakpoints (CORE_ADDR pc, asection *section)
+describe_other_breakpoints (CORE_ADDR pc, asection *section, int thread)
{
int others = 0;
struct breakpoint *b;
if (!b->pending && (!overlay_debugging || b->loc->section == section))
{
others--;
- printf_filtered ("%d%s%s ",
- b->number,
+ printf_filtered ("%d", b->number);
+ if (b->thread == -1 && thread != -1)
+ printf_filtered (" (all threads)");
+ else if (b->thread != -1)
+ printf_filtered (" (thread %d)", b->thread);
+ printf_filtered ("%s%s ",
((b->enable_state == bp_disabled ||
b->enable_state == bp_shlib_disabled ||
b->enable_state == bp_call_disabled)
- ? " (disabled)"
+ ? " (disabled)"
: b->enable_state == bp_permanent
? " (permanent)"
: ""),
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:
set_raw_breakpoint (struct symtab_and_line sal, enum bptype bptype)
{
struct breakpoint *b, *b1;
+ CORE_ADDR adjusted_address;
b = (struct breakpoint *) xmalloc (sizeof (struct breakpoint));
memset (b, 0, sizeof (*b));
+
+ /* Adjust the breakpoint's address prior to allocating a location.
+ Once we call allocate_bp_location(), that mostly uninitialized
+ location will be placed on the location chain. Adjustment of the
+ breakpoint may cause read_memory_nobpt() to be called and we do
+ not want its scan of the location chain to find a breakpoint and
+ location that's only been partially initialized. */
+ adjusted_address = adjust_breakpoint_address (sal.pc, bptype);
+
b->loc = allocate_bp_location (b, bptype);
b->loc->requested_address = sal.pc;
- b->loc->address = adjust_breakpoint_address (b->loc->requested_address,
- bptype);
+ b->loc->address = adjusted_address;
+
if (sal.symtab == NULL)
b->source_file = NULL;
else
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:
struct symtab_and_line sal = sals.sals[i];
if (from_tty)
- describe_other_breakpoints (sal.pc, sal.section);
+ describe_other_breakpoints (sal.pc, sal.section, thread);
b = set_raw_breakpoint (sal, type);
set_breakpoint_count (breakpoint_count + 1);
args.tempflag = tempflag;
args.thread = thread;
args.ignore_count = ignore_count;
- return catch_exceptions_with_msg (uiout, do_captured_breakpoint, &args,
- error_message, RETURN_MASK_ALL);
+ if (catch_exceptions_with_msg (uiout, do_captured_breakpoint, &args,
+ error_message, RETURN_MASK_ALL) < 0)
+ return GDB_RC_FAIL;
+ else
+ return GDB_RC_OK;
}
in hardware. If the watchpoint can not be handled
in hardware return zero. */
-#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)
{
{
struct symtabs_and_lines sals;
struct symtab_and_line sal;
- struct frame_info *prev_frame = get_prev_frame (deprecated_selected_frame);
+ struct frame_info *frame = get_selected_frame (NULL);
+ struct frame_info *prev_frame = get_prev_frame (frame);
struct breakpoint *breakpoint;
struct cleanup *old_chain;
struct continuation_arg *arg1;
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),
+ breakpoint = set_momentary_breakpoint (sal, get_frame_id (frame),
bp_until);
if (!target_can_async_p ())
warning (_("Unsupported with this platform/compiler combination."));
}
+/* Create a breakpoint struct for Ada exception catchpoints. */
+
+static void
+create_ada_exception_breakpoint (struct symtab_and_line sal,
+ char *addr_string,
+ char *exp_string,
+ char *cond_string,
+ struct expression *cond,
+ struct breakpoint_ops *ops,
+ int tempflag,
+ int from_tty)
+{
+ struct breakpoint *b;
+
+ if (from_tty)
+ {
+ describe_other_breakpoints (sal.pc, sal.section, -1);
+ /* FIXME: brobecker/2006-12-28: Actually, re-implement a special
+ version for exception catchpoints, because two catchpoints
+ used for different exception names will use the same address.
+ In this case, a "breakpoint ... also set at..." warning is
+ unproductive. Besides. the warning phrasing is also a bit
+ inapropriate, we should use the word catchpoint, and tell
+ the user what type of catchpoint it is. The above is good
+ enough for now, though. */
+ }
+
+ b = set_raw_breakpoint (sal, bp_breakpoint);
+ set_breakpoint_count (breakpoint_count + 1);
+
+ b->enable_state = bp_enabled;
+ b->disposition = tempflag ? disp_del : disp_donttouch;
+ b->number = breakpoint_count;
+ b->ignore_count = 0;
+ b->cond = cond;
+ b->addr_string = addr_string;
+ b->language = language_ada;
+ b->cond_string = cond_string;
+ b->exp_string = exp_string;
+ b->thread = -1;
+ b->ops = ops;
+ b->from_tty = from_tty;
+
+ mention (b);
+}
+
+/* Implement the "catch exception" command. */
+
+static void
+catch_ada_exception_command (char *arg, int tempflag, int from_tty)
+{
+ struct symtab_and_line sal;
+ enum bptype type;
+ char *addr_string = NULL;
+ char *exp_string = NULL;
+ char *cond_string = NULL;
+ struct expression *cond = NULL;
+ struct breakpoint_ops *ops = NULL;
+
+ sal = ada_decode_exception_location (arg, &addr_string, &exp_string,
+ &cond_string, &cond, &ops);
+ create_ada_exception_breakpoint (sal, addr_string, exp_string,
+ cond_string, cond, ops, tempflag,
+ from_tty);
+}
+
+/* Implement the "catch assert" command. */
+
+static void
+catch_assert_command (char *arg, int tempflag, int from_tty)
+{
+ struct symtab_and_line sal;
+ char *addr_string = NULL;
+ struct breakpoint_ops *ops = NULL;
+
+ sal = ada_decode_assert_location (arg, &addr_string, &ops);
+ create_ada_exception_breakpoint (sal, addr_string, NULL, NULL, NULL, ops,
+ tempflag, from_tty);
+}
+
/* Cover routine to allow wrapping target_enable_exception_catchpoints
inside a catch_errors */
{
error (_("Catch of stop not yet implemented"));
}
+ else if (strncmp (arg1_start, "exception", arg1_length) == 0)
+ {
+ catch_ada_exception_command (arg1_end + 1, tempflag, from_tty);
+ }
+
+ else if (strncmp (arg1_start, "assert", arg1_length) == 0)
+ {
+ catch_assert_command (arg1_end + 1, tempflag, from_tty);
+ }
/* This doesn't appear to be an event name */
_("another breakpoint was inserted on top of "
"a permanent breakpoint"));
+ memset (&b->loc->target_info, 0, sizeof (b->loc->target_info));
+ b->loc->target_info.placed_address = b->loc->address;
if (b->type == bp_hardware_breakpoint)
- val = target_insert_hw_breakpoint (b->loc->address, b->loc->shadow_contents);
+ val = target_insert_hw_breakpoint (&b->loc->target_info);
else
- val = target_insert_breakpoint (b->loc->address, b->loc->shadow_contents);
+ val = target_insert_breakpoint (&b->loc->target_info);
/* If there was an error in the insert, print a message, then stop execution. */
if (val != 0)
b->type != bp_thread_event &&
b->type != bp_overlay_event &&
b->number >= 0)
- breaks_to_delete = 1;
+ {
+ breaks_to_delete = 1;
+ break;
+ }
}
/* Ask user only if there are some breakpoints to delete. */
int mem_cnt = can_use_hardware_watchpoint (bpt->val);
/* Hack around 'unused var' error for some targets here */
- (void) mem_cnt, i;
+ (void) mem_cnt, (void) 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
error (_("Junk at end of line specification: %s"), string);
return sals;
}
+
+/* Create and insert a raw software breakpoint at PC. Return an
+ identifier, which should be used to remove the breakpoint later.
+ In general, places which call this should be using something on the
+ breakpoint chain instead; this function should be eliminated
+ someday. */
+
+void *
+deprecated_insert_raw_breakpoint (CORE_ADDR pc)
+{
+ struct bp_target_info *bp_tgt;
+
+ bp_tgt = xmalloc (sizeof (struct bp_target_info));
+ memset (bp_tgt, 0, sizeof (struct bp_target_info));
+
+ bp_tgt->placed_address = pc;
+ if (target_insert_breakpoint (bp_tgt) != 0)
+ {
+ /* Could not insert the breakpoint. */
+ xfree (bp_tgt);
+ return NULL;
+ }
+
+ return bp_tgt;
+}
+
+/* Remove a breakpoint BP inserted by deprecated_insert_raw_breakpoint. */
+
+int
+deprecated_remove_raw_breakpoint (void *bp)
+{
+ struct bp_target_info *bp_tgt = bp;
+ int ret;
+
+ ret = target_remove_breakpoint (bp_tgt);
+ xfree (bp_tgt);
+
+ return ret;
+}
+
+/* One (or perhaps two) breakpoints used for software single stepping. */
+
+static void *single_step_breakpoints[2];
+
+/* Create and insert a breakpoint for software single step. */
+
+void
+insert_single_step_breakpoint (CORE_ADDR next_pc)
+{
+ void **bpt_p;
+
+ if (single_step_breakpoints[0] == NULL)
+ bpt_p = &single_step_breakpoints[0];
+ else
+ {
+ gdb_assert (single_step_breakpoints[1] == NULL);
+ bpt_p = &single_step_breakpoints[1];
+ }
+
+ /* NOTE drow/2006-04-11: A future improvement to this function would be
+ to only create the breakpoints once, and actually put them on the
+ breakpoint chain. That would let us use set_raw_breakpoint. We could
+ adjust the addresses each time they were needed. Doing this requires
+ corresponding changes elsewhere where single step breakpoints are
+ handled, however. So, for now, we use this. */
+
+ *bpt_p = deprecated_insert_raw_breakpoint (next_pc);
+ if (*bpt_p == NULL)
+ error (_("Could not insert single-step breakpoint at 0x%s"),
+ paddr_nz (next_pc));
+}
+
+/* Remove and delete any breakpoints used for software single step. */
+
+void
+remove_single_step_breakpoints (void)
+{
+ gdb_assert (single_step_breakpoints[0] != NULL);
+
+ /* See insert_single_step_breakpoint for more about this deprecated
+ call. */
+ deprecated_remove_raw_breakpoint (single_step_breakpoints[0]);
+ single_step_breakpoints[0] = NULL;
+
+ if (single_step_breakpoints[1] != NULL)
+ {
+ deprecated_remove_raw_breakpoint (single_step_breakpoints[1]);
+ single_step_breakpoints[1] = NULL;
+ }
+}
+
+/* Check whether a software single-step breakpoint is inserted at PC. */
+
+static int
+single_step_breakpoint_inserted_here_p (CORE_ADDR pc)
+{
+ int i;
+
+ for (i = 0; i < 2; i++)
+ {
+ struct bp_target_info *bp_tgt = single_step_breakpoints[i];
+ if (bp_tgt && bp_tgt->placed_address == pc)
+ return 1;
+ }
+
+ return 0;
+}
+
\f
+/* This help string is used for the break, hbreak, tbreak and thbreak commands.
+ It is defined as a macro to prevent duplication.
+ COMMAND should be a string constant containing the name of the command. */
+#define BREAK_ARGS_HELP(command) \
+command" [LOCATION] [thread THREADNUM] [if CONDITION]\n\
+LOCATION may be a line number, function name, or \"*\" and an address.\n\
+If a line number is specified, break at start of code for that line.\n\
+If a 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 LOCATION, uses current execution address of selected stack frame.\n\
+This is useful for breaking on return to a stack frame.\n\
+\n\
+THREADNUM is the number from \"info threads\".\n\
+CONDITION is a boolean expression.\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."
+
void
_initialize_breakpoint (void)
{
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\
+Set a temporary breakpoint.\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."));
+by using \"enable delete\" on the breakpoint number.\n\
+\n"
+BREAK_ARGS_HELP ("tbreak")));
set_cmd_completer (c, location_completer);
c = add_com ("hbreak", class_breakpoint, hbreak_command, _("\
-Set a hardware assisted breakpoint. Args like \"break\" command.\n\
+Set a hardware assisted breakpoint.\n\
Like \"break\" except the breakpoint requires hardware support,\n\
-some target hardware may not have this support."));
+some target hardware may not have this support.\n\
+\n"
+BREAK_ARGS_HELP ("hbreak")));
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\
+Set a temporary hardware assisted breakpoint.\n\
Like \"hbreak\" except the breakpoint is only temporary,\n\
-so it will be deleted when hit."));
+so it will be deleted when hit.\n\
+\n"
+BREAK_ARGS_HELP ("thbreak")));
set_cmd_completer (c, location_completer);
add_prefix_cmd ("enable", class_breakpoint, enable_command, _("\
The \"unset\" command is also an alias for \"delete\"."),
&deletelist, "delete ", 1, &cmdlist);
add_com_alias ("d", "delete", class_breakpoint, 1);
+ add_com_alias ("del", "delete", class_breakpoint, 1);
if (xdb_commands)
add_com ("db", class_breakpoint, delete_command, _("\
Delete some breakpoints.\n\
See also the \"delete\" command which clears breakpoints by number."));
c = add_com ("break", class_breakpoint, break_command, _("\
-Set breakpoint at specified line or function.\n\
-Argument may be line number, function name, or \"*\" and an address.\n\
-If line number is specified, break at start of code for that line.\n\
-If function is specified, break at start of code for that function.\n\
-If an address is specified, break at that exact address.\n\
-With no arg, uses current execution address of selected stack frame.\n\
-This is useful for breaking on return to a stack frame.\n\
-\n\
-Multiple breakpoints at one place are permitted, and useful if conditional.\n\
-\n\
-Do \"help breakpoints\" for info on other commands dealing with breakpoints."));
+Set breakpoint at specified line or function.\n"
+BREAK_ARGS_HELP ("break")));
set_cmd_completer (c, location_completer);
add_com_alias ("b", "break", class_run, 1);
C++ exceptions may be caught:\n\
\tcatch throw - all exceptions, when thrown\n\
\tcatch catch - all exceptions, when caught\n\
+Ada exceptions may be caught:\n\
+\tcatch exception - all exceptions, when raised\n\
+\tcatch exception <name> - a particular exception, when raised\n\
+\tcatch exception unhandled - all unhandled exceptions, when raised\n\
+\tcatch assert - all failed assertions, when raised\n\
\n\
Do \"help set follow-fork-mode\" for info on debugging your program\n\
after a fork or vfork is caught.\n\n\
&breakpoint_show_cmdlist);
pending_break_support = AUTO_BOOLEAN_AUTO;
+
+ add_setshow_boolean_cmd ("auto-hw", no_class,
+ &automatic_hardware_breakpoints, _("\
+Set automatic usage of hardware breakpoints."), _("\
+Show automatic usage of hardware breakpoints."), _("\
+If set, the debugger will automatically use hardware breakpoints for\n\
+breakpoints set with \"break\" but falling in read-only memory. If not set,\n\
+a warning will be emitted for such breakpoints."),
+ NULL,
+ show_automatic_hardware_breakpoints,
+ &breakpoint_set_cmdlist,
+ &breakpoint_show_cmdlist);
+
+ automatic_hardware_breakpoints = 1;
}
projects / deliverable / binutils-gdb.git / blobdiff