/* Data structures associated with breakpoints in GDB.
- Copyright (C) 1992 Free Software Foundation, Inc.
+ Copyright (C) 1992, 1993, 1994, 1995, 1996 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#if !defined (BREAKPOINT_H)
#define BREAKPOINT_H 1
enum bptype {
bp_breakpoint, /* Normal breakpoint */
+ bp_hardware_breakpoint, /* Hardware assisted breakpoint */
bp_until, /* used by until command */
bp_finish, /* used by finish command */
bp_watchpoint, /* Watchpoint */
+ bp_hardware_watchpoint, /* Hardware assisted watchpoint */
+ bp_read_watchpoint, /* read watchpoint, (hardware assisted) */
+ bp_access_watchpoint, /* access watchpoint, (hardware assisted) */
bp_longjmp, /* secret breakpoint to find longjmp() */
bp_longjmp_resume, /* secret breakpoint to escape longjmp() */
stepping over signal handlers, and for skipping prologues. */
bp_step_resume,
+ /* Used by wait_for_inferior for stepping over signal handlers. */
+ bp_through_sigtramp,
+
+ /* Used to detect when a watchpoint expression has gone out of
+ scope. These breakpoints are usually not visible to the user.
+
+ This breakpoint has some interesting properties:
+
+ 1) There's always a 1:1 mapping between watchpoints
+ on local variables and watchpoint_scope breakpoints.
+
+ 2) It automatically deletes itself and the watchpoint it's
+ associated with when hit.
+
+ 3) It can never be disabled. */
+ bp_watchpoint_scope,
+
/* The breakpoint at the end of a call dummy. */
- bp_call_dummy
+ /* FIXME: What if the function we are calling longjmp()s out of the
+ call, or the user gets out with the "return" command? We currently
+ have no way of cleaning up the breakpoint in these (obscure) situations.
+ (Probably can solve this by noticing longjmp, "return", etc., it's
+ similar to noticing when a watchpoint on a local variable goes out
+ of scope (with hardware support for watchpoints)). */
+ bp_call_dummy,
+
+ /* Some dynamic linkers (HP, maybe Solaris) can arrange for special
+ code in the inferior to run when significant events occur in the
+ dynamic linker (for example a library is loaded or unloaded).
+
+ By placing a breakpoint in this magic code GDB will get control
+ when these significant events occur. GDB can then re-examine
+ the dynamic linker's data structures to discover any newly loaded
+ dynamic libraries. */
+ bp_shlib_event
};
/* States of enablement of breakpoint. */
-enum enable { disabled, enabled};
+enum enable { disabled, enabled, shlib_disabled};
/* Disposition of breakpoint. Ie: what to do after hitting it. */
enum bpdisp {
- delete, /* Delete it */
+ del, /* Delete it */
+ del_at_next_stop, /* Delete at next stop, whether hit or not */
disable, /* Disable it */
donttouch /* Leave it alone */
};
struct command_line *commands;
/* Stack depth (address of frame). If nonzero, break only if fp
equals this. */
- FRAME_ADDR frame;
+ CORE_ADDR frame;
/* Conditional. Break only if this expression's value is nonzero. */
struct expression *cond;
/* String we used to set the breakpoint (malloc'd). Only matters if
address is non-NULL. */
char *addr_string;
+ /* Language we used to set the breakpoint. */
+ enum language language;
+ /* Input radix we used to set the breakpoint. */
+ int input_radix;
/* String form of the breakpoint condition (malloc'd), or NULL if there
is no condition. */
char *cond_string;
valid anywhere (e.g. consists just of global symbols). */
struct block *exp_valid_block;
/* Value of the watchpoint the last time we checked it. */
- value val;
+ value_ptr val;
+
+ /* Holds the value chain for a hardware watchpoint expression. */
+ value_ptr val_chain;
+
+ /* Holds the address of the related watchpoint_scope breakpoint
+ when using watchpoints on local variables (might the concept
+ of a related breakpoint be useful elsewhere, if not just call
+ it the watchpoint_scope breakpoint or something like that. FIXME). */
+ struct breakpoint *related_breakpoint;
+
+ /* Holds the frame address which identifies the frame this watchpoint
+ should be evaluated in, or NULL if the watchpoint should be evaluated
+ on the outermost frame. */
+ CORE_ADDR watchpoint_frame;
+
+ /* Thread number for thread-specific breakpoint, or -1 if don't care */
+ int thread;
+
+ /* Count of the number of times this breakpoint was taken, dumped
+ with the info, but not used for anything else. Useful for
+ seeing how many times you hit a break prior to the program
+ aborting, so you can back up to just before the abort. */
+ int hit_count;
+
};
\f
/* The following stuff is an abstract data type "bpstat" ("breakpoint status").
This provides the ability to determine whether we have stopped at a
breakpoint, and what we should do about it. */
-typedef struct bpstat *bpstat;
+typedef struct bpstats *bpstat;
/* Interface: */
/* Clear a bpstat so that it says we are not at any breakpoint.
is part of the bpstat is copied as well. */
extern bpstat bpstat_copy PARAMS ((bpstat));
-/* Get a bpstat associated with having just stopped at address *PC
- and frame address FRAME_ADDRESS. Update *PC to point at the
- breakpoint (if we hit a breakpoint). */
-/* FIXME: prototypes uses equivalence between FRAME_ADDR and CORE_ADDR */
-extern bpstat bpstat_stop_status PARAMS ((CORE_ADDR *, CORE_ADDR));
+extern bpstat bpstat_stop_status PARAMS ((CORE_ADDR *, int));
\f
/* This bpstat_what stuff tells wait_for_inferior what to do with a
breakpoint (a challenging task). */
/* 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,
+
+ /* Clear through_sigtramp breakpoint, muck with trap_expected, and keep
+ checking. */
+ BPSTAT_WHAT_THROUGH_SIGTRAMP,
+
+ /* Check the dynamic linker's data structures for new libraries, then
+ keep checking. */
+ BPSTAT_WHAT_CHECK_SHLIBS,
+
/* This is just used to keep track of how many enums there are. */
BPSTAT_WHAT_LAST
};
struct bpstat_what {
- enum bpstat_what_main_action main_action : 4;
-
- /* Did we hit the step resume breakpoint? This is separate from the
- main_action to allow for it to be combined with any of the main
- actions. */
- unsigned int step_resume : 1;
+ enum bpstat_what_main_action main_action;
/* Did we hit a call dummy breakpoint? This only goes with a main_action
of BPSTAT_WHAT_STOP_SILENT or BPSTAT_WHAT_STOP_NOISY (the concept of
continuing from a call dummy without popping the frame is not a
useful one). */
- unsigned int call_dummy : 1;
+ int call_dummy;
};
/* Tell what to do about this bpstat. */
extern void bpstat_clear_actions PARAMS ((bpstat));
/* Implementation: */
-struct bpstat
+struct bpstats
{
/* Linked list because there can be two breakpoints at the
same place, and a bpstat reflects the fact that both have been hit. */
/* Commands left to be done. */
struct command_line *commands;
/* Old value associated with a watchpoint. */
- value old_val;
+ value_ptr old_val;
/* Nonzero if this breakpoint tells us to print the frame. */
char print;
struct frame_info;
#endif
-extern int
-breakpoint_here_p PARAMS ((CORE_ADDR));
+extern int breakpoint_here_p PARAMS ((CORE_ADDR));
+
+extern int frame_in_dummy PARAMS ((struct frame_info *));
+
+extern int breakpoint_thread_match PARAMS ((CORE_ADDR, int));
+
+extern void until_break_command PARAMS ((char *, int));
-extern void
-until_break_command PARAMS ((char *, int));
+extern void breakpoint_re_set PARAMS ((void));
-extern void
-breakpoint_re_set PARAMS ((void));
+extern void clear_momentary_breakpoints PARAMS ((void));
-extern void
-clear_momentary_breakpoints PARAMS ((void));
+extern struct breakpoint *set_momentary_breakpoint
+ PARAMS ((struct symtab_and_line, struct frame_info *, enum bptype));
-/* FIXME: Prototype uses equivalence of "struct frame_info *" and FRAME */
-extern struct breakpoint *
-set_momentary_breakpoint PARAMS ((struct symtab_and_line,
- struct frame_info *,
- enum bptype));
+extern void set_ignore_count PARAMS ((int, int, int));
-extern void
-set_ignore_count PARAMS ((int, int, int));
+extern void set_default_breakpoint PARAMS ((int, CORE_ADDR, struct symtab *, int));
-extern void
-set_default_breakpoint PARAMS ((int, CORE_ADDR, struct symtab *, int));
+extern void mark_breakpoints_out PARAMS ((void));
-extern void
-mark_breakpoints_out PARAMS ((void));
+extern void breakpoint_init_inferior PARAMS ((void));
-extern void
-delete_breakpoint PARAMS ((struct breakpoint *));
+extern void delete_breakpoint PARAMS ((struct breakpoint *));
-extern void
-breakpoint_auto_delete PARAMS ((bpstat));
+extern void breakpoint_auto_delete PARAMS ((bpstat));
-extern void
-breakpoint_clear_ignore_counts PARAMS ((void));
+extern void breakpoint_clear_ignore_counts PARAMS ((void));
-extern void
-break_command PARAMS ((char *, int));
+extern void break_command PARAMS ((char *, int));
-extern int
-insert_breakpoints PARAMS ((void));
+extern int insert_breakpoints PARAMS ((void));
-extern int
-remove_breakpoints PARAMS ((void));
+extern int remove_breakpoints PARAMS ((void));
-extern void
-enable_longjmp_breakpoint PARAMS ((void));
+extern void enable_longjmp_breakpoint PARAMS ((void));
-extern void
-disable_longjmp_breakpoint PARAMS ((void));
+extern void disable_longjmp_breakpoint PARAMS ((void));
-extern void
-set_longjmp_resume_breakpoint PARAMS ((CORE_ADDR, FRAME));
+extern void set_longjmp_resume_breakpoint PARAMS ((CORE_ADDR,
+ struct frame_info *));
+extern void clear_breakpoint_hit_counts PARAMS ((void));
+
/* The following are for displays, which aren't really breakpoints, but
here is as good a place as any for them. */
-extern void
-disable_current_display PARAMS ((void));
+extern void disable_current_display PARAMS ((void));
+
+extern void do_displays PARAMS ((void));
+
+extern void disable_display PARAMS ((int));
+
+extern void clear_displays PARAMS ((void));
+
+extern void disable_breakpoint PARAMS ((struct breakpoint *));
+
+extern void enable_breakpoint PARAMS ((struct breakpoint *));
-extern void
-do_displays PARAMS ((void));
+extern void create_solib_event_breakpoint PARAMS ((CORE_ADDR));
-extern void
-disable_display PARAMS ((int));
+extern void remove_solib_event_breakpoints PARAMS ((void));
-extern void
-clear_displays PARAMS ((void));
+extern void re_enable_breakpoints_in_shlibs PARAMS ((void));
#endif /* !defined (BREAKPOINT_H) */
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