#define BREAKPOINT_MAX 16
\f
-/* The follow 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. */
-extern void bpstat_clear PARAMS ((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 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));
-
-/* Nonzero if we should print the frame. */
-#define bpstat_should_print(bs) ((bs) != NULL && (bs)->print)
-
-/* Nonzero if we should stop. */
-#define bpstat_stop(bs) ((bs) != NULL && (bs)->stop)
-
-/* Find the bpstat associated with a breakpoint. NULL otherwise. */
-bpstat bpstat_find_breakpoint(/* bpstat, breakpoint */);
-
-/* Nonzero if we hit a momentary breakpoint. */
-#define bpstat_momentary_breakpoint(bs) ((bs) != NULL && (bs)->momentary)
-
-/* 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. */
-#define bpstat_explains_signal(bs) ((bs) != NULL)
-
-/* 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. */
-extern int bpstat_should_step PARAMS ((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). */
-extern int bpstat_print PARAMS ((bpstat));
-
-/* 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. */
-extern int bpstat_num PARAMS ((bpstat *));
-
-/* Perform actions associated with having stopped at *BSP. */
-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
-{
- /* Linked list because there can be two breakpoints at the
- same place, and a bpstat reflects the fact that both have been hit. */
- bpstat next;
- /* Breakpoint that we are at. */
- struct breakpoint *breakpoint_at;
- /* Commands left to be done. */
- 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. */
- char print;
- /* Nonzero if we should stop. Only significant for the first bpstat in
- the chain. */
- char stop;
- /* Nonzero if we hit a momentary breakpoint. Only significant for the
- first bpstat in the chain. */
- char momentary;
-};
-\f
/* Type of breakpoint. */
/* FIXME In the future, we should fold all other breakpoint-like things into
here. This includes:
- 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).
-*/
+ * 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). */
enum bptype {
bp_breakpoint, /* Normal breakpoint */
bp_finish, /* used by finish command */
bp_watchpoint, /* Watchpoint */
bp_longjmp, /* secret breakpoint to find longjmp() */
- bp_longjmp_resume /* secret breakpoint to escape longjmp() */
+ bp_longjmp_resume, /* secret breakpoint to escape longjmp() */
+
+ /* Used by wait_for_inferior for stepping over subroutine calls, for
+ stepping over signal handlers, and for skipping prologues. */
+ bp_step_resume,
+
+ /* Used by wait_for_inferior for stepping over signal handlers. */
+ bp_through_sigtramp,
+
+ /* The breakpoint at the end of a 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
};
/* States of enablement of breakpoint. */
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. */
+
+ /* Line number of this address. 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;
+
+ /* Source file name of this address. Only matters if address is
+ non-NULL. */
+
+ char *source_file;
+
/* Non-zero means a silent breakpoint (don't print frame info
if we stop here). */
unsigned char silent;
struct block *exp_valid_block;
/* Value of the watchpoint the last time we checked it. */
value val;
+ /* Thread number for thread-specific breakpoint, or -1 if don't care */
+ int thread;
+};
+\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;
+
+/* Interface: */
+/* Clear a bpstat so that it says we are not at any breakpoint.
+ Also free any storage that is part of a bpstat. */
+extern void bpstat_clear PARAMS ((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 PARAMS ((bpstat));
+
+/* FIXME: prototypes uses equivalence between FRAME_ADDR and 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,
+
+ /* 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,
+
+ /* 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;
+
+ /* 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). */
+ int call_dummy;
+};
+
+/* 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 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
+ without hardware support). This isn't related to a specific bpstat,
+ just to things like whether watchpoints are set. */
+extern int bpstat_should_step PARAMS ((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). */
+extern int bpstat_print PARAMS ((bpstat));
+
+/* 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. */
+extern int bpstat_num PARAMS ((bpstat *));
+
+/* 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
+{
+ /* Linked list because there can be two breakpoints at the
+ same place, and a bpstat reflects the fact that both have been hit. */
+ bpstat next;
+ /* Breakpoint that we are at. */
+ struct breakpoint *breakpoint_at;
+ /* Commands left to be done. */
+ struct command_line *commands;
+ /* Old value associated with a watchpoint. */
+ value old_val;
+
+ /* Nonzero if this breakpoint tells us to print the frame. */
+ char print;
+
+ /* Nonzero if this breakpoint tells us to stop. */
+ char stop;
+
+ /* 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
/* Prototypes for breakpoint-related functions. */
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
mark_breakpoints_out PARAMS ((void));
+extern void
+breakpoint_init_inferior PARAMS ((void));
+
extern void
delete_breakpoint PARAMS ((struct breakpoint *));
projects / deliverable / binutils-gdb.git / blobdiff