-/* Copyright (C) 1992 Free Software Foundation, Inc.
+/* Data structures associated with breakpoints in GDB.
+ Copyright (C) 1992 Free Software Foundation, Inc.
This file is part of GDB.
Feel free to increase it. It's just used in a few places to size
arrays that should be independent of the target architecture. */
-#define BREAKPOINT_MAX 10
-
-typedef struct bpstat__struct *bpstat;
-
-#ifdef __STDC__ /* Forward declarations for prototypes */
-struct frame_info;
-#endif
-
-extern int
-breakpoint_here_p PARAMS ((CORE_ADDR));
+#define BREAKPOINT_MAX 16
+\f
+/* Type of breakpoint. */
+/* FIXME In the future, we should fold all other breakpoint-like things into
+ here. This includes:
-extern void
-until_break_command PARAMS ((char *, int));
+ * single-step (for machines where we have to simulate single stepping)
+ (probably, though perhaps it is better for it to look as much as
+ possible like a single-step to wait_for_inferior). */
-extern void
-breakpoint_re_set PARAMS ((void));
+enum bptype {
+ bp_breakpoint, /* Normal breakpoint */
+ bp_until, /* used by until command */
+ bp_finish, /* used by finish command */
+ bp_watchpoint, /* Watchpoint */
+ bp_longjmp, /* secret breakpoint to find longjmp() */
+ bp_longjmp_resume, /* secret breakpoint to escape longjmp() */
-extern void
-clear_momentary_breakpoints PARAMS ((void));
+ /* Used by wait_for_inferior for stepping over subroutine calls, for
+ stepping over signal handlers, and for skipping prologues. */
+ bp_step_resume,
-/* 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));
+ /* The breakpoint at the end of a call dummy. */
+ bp_call_dummy
+};
-extern void
-set_ignore_count PARAMS ((int, int, int));
+/* States of enablement of breakpoint. */
-extern void
-set_default_breakpoint PARAMS ((int, CORE_ADDR, struct symtab *, int));
+enum enable { disabled, enabled};
-extern void
-mark_breakpoints_out PARAMS ((void));
+/* Disposition of breakpoint. Ie: what to do after hitting it. */
-extern void
-delete_breakpoint PARAMS ((struct breakpoint *));
+enum bpdisp {
+ delete, /* Delete it */
+ disable, /* Disable it */
+ donttouch /* Leave it alone */
+};
-extern void
-breakpoint_auto_delete PARAMS ((bpstat));
+/* 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
+ useful for a hack I had to put in; I'm going to leave it in because
+ I can see how there might be times when it would indeed be useful */
-extern void
-breakpoint_clear_ignore_counts PARAMS ((void));
+/* This is for a breakpoint or a watchpoint. */
-extern void
-break_command PARAMS ((char *, int));
+struct breakpoint
+{
+ struct breakpoint *next;
+ /* Type of breakpoint. */
+ enum bptype type;
+ /* Zero means disabled; remember the info but don't break here. */
+ enum enable enable;
+ /* What to do with this breakpoint after we hit it. */
+ enum bpdisp disposition;
+ /* Number assigned to distinguish breakpoints. */
+ int number;
-extern int
-insert_breakpoints PARAMS ((void));
+ /* Address to break at, or NULL if not a breakpoint. */
+ CORE_ADDR address;
-extern int
-remove_breakpoints PARAMS ((void));
+ /* Line number of this address. Only matters if address is
+ non-NULL. */
-/* The following are for displays, which aren't really breakpoints, but
- here is as good a place as any for them. */
+ int line_number;
-extern void
-disable_current_display PARAMS ((void));
+ /* Source file name of this address. Only matters if address is
+ non-NULL. */
-extern void
-do_displays PARAMS ((void));
+ char *source_file;
-extern void
-disable_display PARAMS ((int));
+ /* Non-zero means a silent breakpoint (don't print frame info
+ if we stop here). */
+ unsigned char silent;
+ /* Number of stops at this breakpoint that should
+ be continued automatically before really stopping. */
+ int ignore_count;
+ /* "Real" contents of byte where breakpoint has been inserted.
+ Valid only when breakpoints are in the program. Under the complete
+ control of the target insert_breakpoint and remove_breakpoint routines.
+ No other code should assume anything about the value(s) here. */
+ char shadow_contents[BREAKPOINT_MAX];
+ /* Nonzero if this breakpoint is now inserted. Only matters if address
+ is non-NULL. */
+ char inserted;
+ /* Nonzero if this is not the first breakpoint in the list
+ for the given address. Only matters if address is non-NULL. */
+ char duplicate;
+ /* Chain of command lines to execute when this breakpoint is hit. */
+ struct command_line *commands;
+ /* Stack depth (address of frame). If nonzero, break only if fp
+ equals this. */
+ FRAME_ADDR frame;
+ /* Conditional. Break only if this expression's value is nonzero. */
+ struct expression *cond;
-extern void
-clear_displays PARAMS ((void));
+ /* String we used to set the breakpoint (malloc'd). Only matters if
+ address is non-NULL. */
+ char *addr_string;
+ /* String form of the breakpoint condition (malloc'd), or NULL if there
+ is no condition. */
+ char *cond_string;
+ /* String form of exp (malloc'd), or NULL if none. */
+ char *exp_string;
+ /* The expression we are watching, or NULL if not a watchpoint. */
+ struct expression *exp;
+ /* The largest block within which it is valid, or NULL if it is
+ valid anywhere (e.g. consists just of global symbols). */
+ struct block *exp_valid_block;
+ /* Value of the watchpoint the last time we checked it. */
+ value val;
+};
\f
-/* The follow stuff is an abstract data type "bpstat" ("breakpoint status").
+/* 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;
+
/* Interface: */
/* Clear a bpstat so that it says we are not at any breakpoint.
Also free any storage that is part of a bpstat. */
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 *, CORE_ADDR, int));
+\f
+/* This bpstat_what stuff tells wait_for_inferior what to do with a
+ breakpoint (a challenging task). */
+
+enum bpstat_what_main_action {
+ /* Perform various other tests; that is, this bpstat does not
+ say to perform any action (e.g. failed watchpoint and nothing
+ else). */
+ BPSTAT_WHAT_KEEP_CHECKING,
+
+ /* Rather than distinguish between noisy and silent stops here, it
+ might be cleaner to have bpstat_print make that decision (also
+ taking into account stop_print_frame and source_only). But the
+ implications are a bit scary (interaction with auto-displays, etc.),
+ so I won't try it. */
+
+ /* Stop silently. */
+ BPSTAT_WHAT_STOP_SILENT,
+
+ /* Stop and print. */
+ BPSTAT_WHAT_STOP_NOISY,
+
+ /* Remove breakpoints, single step once, then put them back in and
+ go back to what we were doing. It's possible that this should be
+ removed from the main_action and put into a separate field, to more
+ cleanly handle BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE. */
+ BPSTAT_WHAT_SINGLE,
+
+ /* Set longjmp_resume breakpoint, remove all other breakpoints,
+ and continue. The "remove all other breakpoints" part is required
+ if we are also stepping over another breakpoint as well as doing
+ the longjmp handling. */
+ BPSTAT_WHAT_SET_LONGJMP_RESUME,
+
+ /* Clear longjmp_resume breakpoint, then handle as
+ 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,
+
+ /* This is just used to keep track of how many enums there are. */
+ BPSTAT_WHAT_LAST
+};
-/* Nonzero if we should print the frame. */
-#define bpstat_should_print(bs) ((bs) != NULL && (bs)->print)
+struct bpstat_what {
+ enum bpstat_what_main_action main_action : 4;
-/* Nonzero if we should stop. */
-#define bpstat_stop(bs) ((bs) != NULL && (bs)->stop)
+ /* 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;
-/* Find the bpstat associated with a breakpoint. NULL otherwise. */
-bpstat bpstat_find_breakpoint(/* bpstat, breakpoint */);
+ /* 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;
+};
-/* Nonzero if we hit a momentary breakpoint. */
-#define bpstat_momentary_breakpoint(bs) ((bs) != NULL && (bs)->momentary)
+/* Tell what to do about this bpstat. */
+struct bpstat_what bpstat_what PARAMS ((bpstat));
+\f
+/* Find the bpstat associated with a breakpoint. NULL otherwise. */
+bpstat bpstat_find_breakpoint PARAMS ((bpstat, struct breakpoint *));
/* Nonzero if a signal that we got in wait() was due to circumstances
explained by the BS. */
-/* Currently that is true iff we have hit a breakpoint. */
+/* Currently that is true if we have hit a breakpoint, or if there is
+ a watchpoint enabled. */
#define bpstat_explains_signal(bs) ((bs) != NULL)
/* Nonzero if we should step constantly (e.g. watchpoints on machines
Return 0 if passed a bpstat which does not indicate any breakpoints. */
extern int bpstat_num PARAMS ((bpstat *));
-/* Perform actions associated with having stopped at *BSP. */
+/* Perform actions associated with having stopped at *BSP. Actually, we just
+ use this for breakpoint commands. Perhaps other actions will go here
+ later, but this is executed at a late time (from the command loop). */
extern void bpstat_do_actions PARAMS ((bpstat *));
/* Modify BS so that the actions will not be performed. */
extern void bpstat_clear_actions PARAMS ((bpstat));
/* Implementation: */
-struct bpstat__struct
+struct bpstat
{
/* Linked list because there can be two breakpoints at the
same place, and a bpstat reflects the fact that both have been hit. */
struct command_line *commands;
/* Old value associated with a watchpoint. */
value old_val;
- /* Nonzero if we should print the frame. Only significant for the first
- bpstat in the chain. */
+
+ /* Nonzero if this breakpoint tells us to print the frame. */
char print;
- /* Nonzero if we should stop. Only significant for the first bpstat in
- the chain. */
+
+ /* Nonzero if this breakpoint tells us to stop. */
char stop;
- /* Nonzero if we hit a momentary breakpoint. Only significant for the
- first bpstat in the chain. */
- char momentary;
+
+ /* Function called by bpstat_print to print stuff associated with
+ this element of the bpstat chain. Returns 0 or 1 just like
+ bpstat_print, or -1 if it can't deal with it. */
+ int (*print_it) PARAMS((bpstat bs));
};
\f
-/* Type of breakpoint. */
-/* FIXME In the future, we should fold all other breakpoint-like things into
- here. This includes:
+/* Prototypes for breakpoint-related functions. */
- 1) single-step (for machines where we have to simulate single stepping),
- 2) step-resume (for 'next'ing over subroutine calls),
- 3) call-dummy (the breakpoint at the end of a subroutine stub that gdb
- uses to call functions in the target).
-*/
+#ifdef __STDC__ /* Forward declarations for prototypes */
+struct frame_info;
+#endif
-enum bptype {
- bp_breakpoint, /* Normal breakpoint */
- bp_until, /* used by until command */
- bp_finish, /* used by finish command */
- bp_watchpoint, /* Watchpoint */
- bp_longjmp, /* secret breakpoint to find longjmp() */
- bp_longjmp_resume, /* secret breakpoint to escape longjmp() */
-};
+extern int
+breakpoint_here_p PARAMS ((CORE_ADDR));
-/* States of enablement of breakpoint. */
+extern void
+until_break_command PARAMS ((char *, int));
-enum enable { disabled, enabled};
+extern void
+breakpoint_re_set PARAMS ((void));
-/* Disposition of breakpoint. Ie: what to do after hitting it. */
+extern void
+clear_momentary_breakpoints PARAMS ((void));
-enum bpdisp {
- delete, /* Delete it */
- disable, /* Disable it */
- donttouch, /* Leave it alone */
-};
+/* 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));
-/* 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
- useful for a hack I had to put in; I'm going to leave it in because
- I can see how there might be times when it would indeed be useful */
+extern void
+set_ignore_count PARAMS ((int, int, int));
-/* This is for a breakpoint or a watchpoint. */
+extern void
+set_default_breakpoint PARAMS ((int, CORE_ADDR, struct symtab *, int));
-struct breakpoint
-{
- struct breakpoint *next;
- /* Type of breakpoint. */
- enum bptype type;
- /* Zero means disabled; remember the info but don't break here. */
- enum enable enable;
- /* What to do with this breakpoint after we hit it. */
- enum bpdisp disposition;
- /* Number assigned to distinguish breakpoints. */
- int number;
- /* Address to break at, or NULL if not a breakpoint. */
- CORE_ADDR address;
- /* Line number of this address. Redundant. Only matters if address
- is non-NULL. */
- int line_number;
- /* Symtab of file of this address. Redundant. Only matters if address
- is non-NULL. */
- struct symtab *symtab;
- /* Non-zero means a silent breakpoint (don't print frame info
- if we stop here). */
- unsigned char silent;
- /* Number of stops at this breakpoint that should
- be continued automatically before really stopping. */
- int ignore_count;
- /* "Real" contents of byte where breakpoint has been inserted.
- Valid only when breakpoints are in the program. Under the complete
- control of the target insert_breakpoint and remove_breakpoint routines.
- No other code should assume anything about the value(s) here. */
- char shadow_contents[BREAKPOINT_MAX];
- /* Nonzero if this breakpoint is now inserted. Only matters if address
- is non-NULL. */
- char inserted;
- /* Nonzero if this is not the first breakpoint in the list
- for the given address. Only matters if address is non-NULL. */
- char duplicate;
- /* Chain of command lines to execute when this breakpoint is hit. */
- struct command_line *commands;
- /* Stack depth (address of frame). If nonzero, break only if fp
- equals this. */
- FRAME_ADDR frame;
- /* Conditional. Break only if this expression's value is nonzero. */
- struct expression *cond;
+extern void
+mark_breakpoints_out PARAMS ((void));
- /* String we used to set the breakpoint (malloc'd). Only matters if
- address is non-NULL. */
- char *addr_string;
- /* String form of the breakpoint condition (malloc'd), or NULL if there
- is no condition. */
- char *cond_string;
+extern void
+breakpoint_init_inferior PARAMS ((void));
- /* The expression we are watching, or NULL if not a watchpoint. */
- struct expression *exp;
- /* The largest block within which it is valid, or NULL if it is
- valid anywhere (e.g. consists just of global symbols). */
- struct block *exp_valid_block;
- /* Value of the watchpoint the last time we checked it. */
- value val;
-};
+extern void
+delete_breakpoint PARAMS ((struct breakpoint *));
+
+extern void
+breakpoint_auto_delete PARAMS ((bpstat));
+
+extern void
+breakpoint_clear_ignore_counts PARAMS ((void));
+
+extern void
+break_command PARAMS ((char *, int));
+
+extern int
+insert_breakpoints PARAMS ((void));
+
+extern int
+remove_breakpoints PARAMS ((void));
+
+extern void
+enable_longjmp_breakpoint PARAMS ((void));
+
+extern void
+disable_longjmp_breakpoint PARAMS ((void));
+
+extern void
+set_longjmp_resume_breakpoint PARAMS ((CORE_ADDR, FRAME));
+
+/* 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
+do_displays PARAMS ((void));
+
+extern void
+disable_display PARAMS ((int));
+
+extern void
+clear_displays PARAMS ((void));
#endif /* !defined (BREAKPOINT_H) */
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