/* Data structures associated with breakpoints in GDB.
Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
- 2002, 2003, 2004, 2007 Free Software Foundation, Inc.
+ 2002, 2003, 2004, 2007, 2008 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
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
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., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#if !defined (BREAKPOINT_H)
#define BREAKPOINT_H 1
#include "frame.h"
#include "value.h"
+#include "vec.h"
#include "gdb-events.h"
bp_catch_fork,
bp_catch_vfork,
bp_catch_exec,
-
- /* These are catchpoints to implement "catch catch" and "catch throw"
- commands for C++ exception handling. */
- bp_catch_catch,
- bp_catch_throw
-
-
};
/* States of enablement of breakpoint. */
{
bp_disabled, /* The eventpoint is inactive, and cannot trigger. */
bp_enabled, /* The eventpoint is active, and can trigger. */
- bp_shlib_disabled, /* The eventpoint's address is in an unloaded solib.
- The eventpoint will be automatically enabled
- and reset when that solib is loaded. */
bp_call_disabled, /* The eventpoint has been disabled while a call
into the inferior is "in flight", because some
eventpoints interfere with the implementation of
struct bp_location
{
- /* Chain pointer to the next breakpoint location. */
+ /* Chain pointer to the next breakpoint location for
+ the same parent breakpoint. */
struct bp_location *next;
+ /* Pointer to the next breakpoint location, in a global
+ list of all breakpoint locations. */
+ struct bp_location *global_next;
+
/* Type of this breakpoint location. */
enum bp_loc_type loc_type;
than reference counting. */
struct breakpoint *owner;
+ /* Conditional. Break only if this expression's value is nonzero.
+ Unlike string form of condition, which is associated with breakpoint,
+ this is associated with location, since if breakpoint has several
+ locations, the evaluation of expression can be different for
+ different locations. */
+ struct expression *cond;
+
+ /* This location's address is in an unloaded solib, and so this
+ location should not be inserted. It will be automatically
+ enabled when that solib is loaded. */
+ char shlib_disabled;
+
+ /* Is this particular location enabled. */
+ char enabled;
+
/* Nonzero if this breakpoint is now inserted. */
char inserted;
bp_loc_other. */
CORE_ADDR address;
+ /* For hardware watchpoints, the size of data ad ADDRESS being watches. */
+ int length;
+
+ /* Type of hardware watchpoint. */
+ enum target_hw_bp_type watchpoint_type;
+
/* For any breakpoint type with an address, this is the BFD section
associated with the address. Used primarily for overlay debugging. */
asection *section;
processor's architectual constraints. */
CORE_ADDR requested_address;
+ char *function_name;
+
/* Details of the placed breakpoint, when inserted. */
struct bp_target_info target_info;
/* Similarly, for the breakpoint at an overlay's LMA, if necessary. */
struct bp_target_info overlay_target_info;
+
+ /* In a non-stop mode, it's possible that we delete a breakpoint,
+ but as we do that, some still running thread hits that breakpoint.
+ For that reason, we need to keep locations belonging to deleted
+ breakpoints for a bit, so that don't report unexpected SIGTRAP.
+ We can't keep such locations forever, so we use a heuristic --
+ after we process certain number of inferior events since
+ breakpoint was deleted, we retire all locations of that breakpoint.
+ This variable keeps a number of events still to go, when
+ it becomes 0 this location is retired. */
+ int events_till_retirement;
};
/* This structure is a collection of function pointers that, if available,
void (*print_mention) (struct breakpoint *);
};
+enum watchpoint_triggered
+{
+ /* This watchpoint definitely did not trigger. */
+ watch_triggered_no = 0,
+
+ /* Some hardware watchpoint triggered, and it might have been this
+ one, but we do not know which it was. */
+ watch_triggered_unknown,
+
+ /* This hardware watchpoint definitely did trigger. */
+ watch_triggered_yes
+};
+
+typedef struct bp_location *bp_location_p;
+DEF_VEC_P(bp_location_p);
+
/* Note that the ->silent field is not currently used by any commands
(though the code is in there if it was to be, and set_raw_breakpoint
does set it to 0). I implemented it because I thought it would be
/* Stack depth (address of frame). If nonzero, break only if fp
equals this. */
struct frame_id frame_id;
- /* Conditional. Break only if this expression's value is nonzero. */
- struct expression *cond;
/* String we used to set the breakpoint (malloc'd). */
char *addr_string;
/* The largest block within which it is valid, or NULL if it is
valid anywhere (e.g. consists just of global symbols). */
struct block *exp_valid_block;
- /* Value of the watchpoint the last time we checked it. */
+ /* Value of the watchpoint the last time we checked it, or NULL
+ when we do not know the value yet or the value was not
+ readable. VAL is never lazy. */
struct value *val;
-
- /* Holds the value chain for a hardware watchpoint expression. */
- struct value *val_chain;
+ /* Nonzero if VAL is valid. If VAL_VALID is set but VAL is NULL,
+ then an error occurred reading the value. */
+ int val_valid;
/* Holds the address of the related watchpoint_scope breakpoint
when using watchpoints on local variables (might the concept
should be evaluated on the outermost frame. */
struct frame_id watchpoint_frame;
+ /* For hardware watchpoints, the triggered status according to the
+ hardware. */
+ enum watchpoint_triggered watchpoint_triggered;
+
/* Thread number for thread-specific breakpoint, or -1 if don't care */
int thread;
/* Methods associated with this breakpoint. */
struct breakpoint_ops *ops;
- /* Was breakpoint issued from a tty? Saved for the use of pending breakpoints. */
- int from_tty;
-
- /* Flag value for pending breakpoint.
- first bit : 0 non-temporary, 1 temporary.
- second bit : 0 normal breakpoint, 1 hardware breakpoint. */
- int flag;
-
- /* Is breakpoint pending on shlib loads? */
- int pending;
+ /* Is breakpoint's condition not yet parsed because we found
+ no location initially so had no context to parse
+ the condition in. */
+ int condition_not_parsed;
};
+
+typedef struct breakpoint *breakpoint_p;
+DEF_VEC_P(breakpoint_p);
\f
/* The following stuff is an abstract data type "bpstat" ("breakpoint
status"). This provides the ability to determine whether we have
typedef struct bpstats *bpstat;
-/* Interface: */
-/* Clear a bpstat so that it says we are not at any breakpoint.
- Also free any storage that is part of a bpstat. */
+/* Frees any storage that is part of a bpstat.
+ Does not walk the 'next' chain. */
+extern void bpstat_free (bpstat);
+
+/* Clears a chain of bpstat, freeing storage
+ of each. */
extern void bpstat_clear (bpstat *);
/* Return a copy of a bpstat. Like "bs1 = bs2" but all storage that
is part of the bpstat is copied as well. */
extern bpstat bpstat_copy (bpstat);
-extern bpstat bpstat_stop_status (CORE_ADDR pc, ptid_t ptid,
- int stopped_by_watchpoint);
+extern bpstat bpstat_stop_status (CORE_ADDR pc, ptid_t ptid);
\f
/* This bpstat_what stuff tells wait_for_inferior what to do with a
breakpoint (a challenging task). */
BPSTAT_WHAT_KEEP_CHECKING. */
BPSTAT_WHAT_CLEAR_LONGJMP_RESUME,
- /* Clear longjmp_resume breakpoint, then handle as BPSTAT_WHAT_SINGLE. */
- BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE,
-
/* Clear step resume breakpoint, and keep checking. */
BPSTAT_WHAT_STEP_RESUME,
just to things like whether watchpoints are set. */
extern int bpstat_should_step (void);
-/* Nonzero if there are enabled hardware watchpoints. */
-extern int bpstat_have_active_hw_watchpoints (void);
-
/* Print a message indicating what happened. Returns nonzero to
say that only the source line should be printed after this (zero
return means print the frame as well as the source line). */
place, and a bpstat reflects the fact that both have been hit. */
bpstat next;
/* Breakpoint that we are at. */
- struct breakpoint *breakpoint_at;
+ const struct bp_location *breakpoint_at;
/* Commands left to be done. */
struct command_line *commands;
/* Old value associated with a watchpoint. */
extern int breakpoint_inserted_here_p (CORE_ADDR);
+extern int regular_breakpoint_inserted_here_p (CORE_ADDR);
+
extern int software_breakpoint_inserted_here_p (CORE_ADDR);
extern int breakpoint_thread_match (CORE_ADDR, ptid_t);
extern void breakpoint_re_set_thread (struct breakpoint *);
-extern int ep_is_exception_catchpoint (struct breakpoint *);
-
extern struct breakpoint *set_momentary_breakpoint
(struct symtab_and_line, struct frame_id, enum bptype);
+extern struct breakpoint *set_momentary_breakpoint_at_pc
+ (CORE_ADDR pc, enum bptype type);
+
extern void set_ignore_count (int, int, int);
extern void set_default_breakpoint (int, CORE_ADDR, struct symtab *, int);
-extern void mark_breakpoints_out (void);
-
extern void breakpoint_init_inferior (enum inf_context);
extern struct cleanup *make_cleanup_delete_breakpoint (struct breakpoint *);
-extern struct cleanup *make_exec_cleanup_delete_breakpoint (struct breakpoint *);
-
extern void delete_breakpoint (struct breakpoint *);
extern void breakpoint_auto_delete (bpstat);
extern void rwatch_command_wrapper (char *, int);
extern void tbreak_command (char *, int);
-extern int insert_breakpoints (void);
+extern void set_breakpoint (char *address, char *condition,
+ int hardwareflag, int tempflag,
+ int thread, int ignore_count,
+ int pending);
+
+extern void insert_breakpoints (void);
extern int remove_breakpoints (void);
inferior_ptid. */
extern int detach_breakpoints (int);
-extern void enable_longjmp_breakpoint (void);
-extern void disable_longjmp_breakpoint (void);
+extern void set_longjmp_breakpoint (void);
+extern void delete_longjmp_breakpoint (int thread);
+
extern void enable_overlay_breakpoints (void);
extern void disable_overlay_breakpoints (void);
-extern void set_longjmp_resume_breakpoint (CORE_ADDR, struct frame_id);
/* These functions respectively disable or reenable all currently
enabled watchpoints. When disabled, the watchpoints are marked
call_disabled. When reenabled, they are marked enabled.
extern void disable_breakpoints_in_shlibs (void);
-extern void re_enable_breakpoints_in_shlibs (void);
-
-extern void create_solib_load_event_breakpoint (char *, int, char *, char *);
-
-extern void create_solib_unload_event_breakpoint (char *, int,
- char *, char *);
-
-extern void create_fork_event_catchpoint (int, char *);
-
-extern void create_vfork_event_catchpoint (int, char *);
-
-extern void create_exec_event_catchpoint (int, char *);
-
/* This function returns TRUE if ep is a catchpoint. */
extern int ep_is_catchpoint (struct breakpoint *);
such as a library load or unload. */
extern int ep_is_shlib_catchpoint (struct breakpoint *);
-extern struct breakpoint *set_breakpoint_sal (struct symtab_and_line);
-
/* Enable breakpoints and delete when hit. Called with ARG == NULL
deletes all breakpoints. */
extern void delete_command (char *arg, int from_tty);
extern void *deprecated_insert_raw_breakpoint (CORE_ADDR);
extern int deprecated_remove_raw_breakpoint (void *);
+/* Check if any hardware watchpoints have triggered, according to the
+ target. */
+int watchpoints_triggered (struct target_waitstatus *);
+
+/* Update BUF, which is LEN bytes read from the target address MEMADDR,
+ by replacing any memory breakpoints with their shadowed contents. */
+void breakpoint_restore_shadows (gdb_byte *buf, ULONGEST memaddr,
+ LONGEST len);
+
+extern int breakpoints_always_inserted_mode (void);
+
+/* Called each time new event from target is processed.
+ Retires previously deleted breakpoint locations that
+ in our opinion won't ever trigger. */
+extern void breakpoint_retire_moribund (void);
+
#endif /* !defined (BREAKPOINT_H) */
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