struct value;
struct block;
struct breakpoint_object;
+struct get_number_or_range_state;
+struct thread_info;
+struct bpstats;
+struct bp_location;
/* This is the maximum number of bytes a breakpoint instruction can
take. Feel free to increase it. It's just used in a few places to
bp_exception_resume,
/* Used by wait_for_inferior for stepping over subroutine calls,
- for stepping over signal handlers, and for skipping
- prologues. */
+ and for skipping prologues. */
bp_step_resume,
+ /* Used by wait_for_inferior for stepping over signal
+ handlers. */
+ bp_hp_step_resume,
+
/* Used to detect when a watchpoint expression has gone out of
scope. These breakpoints are usually not visible to the user.
/* Event for JIT compiled code generation or deletion. */
bp_jit_event,
+
+ /* Breakpoint is placed at the STT_GNU_IFUNC resolver. When hit GDB
+ inserts new bp_gnu_ifunc_resolver_return at the caller.
+ bp_gnu_ifunc_resolver is still being kept here as a different thread
+ may still hit it before bp_gnu_ifunc_resolver_return is hit by the
+ original thread. */
+ bp_gnu_ifunc_resolver,
+
+ /* On its hit GDB now know the resolved address of the target
+ STT_GNU_IFUNC function. Associated bp_gnu_ifunc_resolver can be
+ deleted now and the breakpoint moved to the target function entry
+ point. */
+ bp_gnu_ifunc_resolver_return,
};
/* States of enablement of breakpoint. */
is used to determine the type of breakpoint to insert. */
CORE_ADDR placed_address;
+ /* If this is a ranged breakpoint, then this field contains the
+ length of the range that will be watched for execution. */
+ int length;
+
/* If the breakpoint lives in memory and reading that memory would
give back the breakpoint, instead of the original contents, then
the original contents are cached here. Only SHADOW_LEN bytes of
bp_loc_other /* Miscellaneous... */
};
+/* This structure is a collection of function pointers that, if
+ available, will be called instead of performing the default action
+ for this bp_loc_type. */
+
+struct bp_location_ops
+{
+ /* Destructor. Releases everything from SELF (but not SELF
+ itself). */
+ void (*dtor) (struct bp_location *self);
+};
+
struct bp_location
{
/* Chain pointer to the next breakpoint location for
the same parent breakpoint. */
struct bp_location *next;
+ /* Methods associated with this location. */
+ const struct bp_location_ops *ops;
+
/* The reference count. */
int refc;
bp_loc_other. */
CORE_ADDR address;
- /* For hardware watchpoints, the size of data ad ADDRESS being
- watches. */
+ /* For hardware watchpoints, the size of the memory region being
+ watched. For hardware ranged breakpoints, the size of the
+ breakpoint range. */
int length;
/* Type of hardware watchpoint. */
struct breakpoint_ops
{
+ /* Destructor. Releases everything from SELF (but not SELF
+ itself). */
+ void (*dtor) (struct breakpoint *self);
+
+ /* Allocate a location for this breakpoint. */
+ struct bp_location * (*allocate_location) (struct breakpoint *);
+
+ /* Reevaluate a breakpoint. This is necessary after symbols change
+ (e.g., an executable or DSO was loaded, or the inferior just
+ started). */
+ void (*re_set) (struct breakpoint *self);
+
/* Insert the breakpoint or watchpoint or activate the catchpoint.
- Return 0 for success, 1 if the breakpoint, watchpoint or catchpoint
- type is not supported, -1 for failure. */
+ Return 0 for success, 1 if the breakpoint, watchpoint or
+ catchpoint type is not supported, -1 for failure. */
int (*insert_location) (struct bp_location *);
/* Remove the breakpoint/catchpoint that was previously inserted
-1 for failure. */
int (*remove_location) (struct bp_location *);
- /* Return non-zero if the debugger should tell the user that this
- breakpoint was hit. */
- int (*breakpoint_hit) (struct breakpoint *);
+ /* Return true if it the target has stopped due to hitting
+ breakpoint location BL. This function does not check if we
+ should stop, only if BL explains the stop. */
+ int (*breakpoint_hit) (const struct bp_location *bl, struct address_space *,
+ CORE_ADDR);
+
+ /* Check internal conditions of the breakpoint referred to by BS.
+ If we should not stop for this breakpoint, set BS->stop to 0. */
+ void (*check_status) (struct bpstats *bs);
+
+ /* Tell how many hardware resources (debug registers) are needed
+ for this breakpoint. If this function is not provided, then
+ the breakpoint or watchpoint needs one debug register. */
+ int (*resources_needed) (const struct bp_location *);
+
+ /* Tell whether we can downgrade from a hardware watchpoint to a software
+ one. If not, the user will not be able to enable the watchpoint when
+ there are not enough hardware resources available. */
+ int (*works_in_software_mode) (const struct breakpoint *);
/* The normal print routine for this breakpoint, called when we
hit it. */
- enum print_stop_action (*print_it) (struct breakpoint *);
+ enum print_stop_action (*print_it) (struct bpstats *bs);
/* Display information about this breakpoint, for "info
breakpoints". */
void (*print_one) (struct breakpoint *, struct bp_location **);
+ /* Display extra information about this breakpoint, below the normal
+ breakpoint description in "info breakpoints".
+
+ In the example below, the "address range" line was printed
+ by print_one_detail_ranged_breakpoint.
+
+ (gdb) info breakpoints
+ Num Type Disp Enb Address What
+ 2 hw breakpoint keep y in main at test-watch.c:70
+ address range: [0x10000458, 0x100004c7]
+
+ */
+ void (*print_one_detail) (const struct breakpoint *, struct ui_out *);
+
/* Display information about this breakpoint after setting it
(roughly speaking; this is called from "mention"). */
void (*print_mention) (struct breakpoint *);
detail to the breakpoints module. */
struct counted_command_line;
+/* Some targets (e.g., embedded PowerPC) need two debug registers to set
+ a watchpoint over a memory region. If this flag is true, GDB will use
+ only one register per watchpoint, thus assuming that all acesses that
+ modify a memory location happen at its starting address. */
+
+extern int target_exact_watchpoints;
+
/* 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 */
-/* This is for a breakpoint or a watchpoint. */
+/* This is for all kinds of breakpoints. */
struct breakpoint
{
+ /* Methods associated with this breakpoint. */
+ struct breakpoint_ops *ops;
+
struct breakpoint *next;
/* Type of breakpoint. */
enum bptype type;
/* Non-zero means a silent breakpoint (don't print frame info
if we stop here). */
unsigned char silent;
+ /* Non-zero means display ADDR_STRING to the user verbatim. */
+ unsigned char display_canonical;
/* Number of stops at this breakpoint that should
be continued automatically before really stopping. */
int ignore_count;
/* String we used to set the breakpoint (malloc'd). */
char *addr_string;
+
+ /* For a ranged breakpoint, the string we used to find
+ the end of the range (malloc'd). */
+ char *addr_string_range_end;
+
/* Architecture we used to set the breakpoint. */
struct gdbarch *gdbarch;
/* Language we used to set the breakpoint. */
char *cond_string;
/* String form of exp to use for displaying to the user
(malloc'd), or NULL if none. */
- char *exp_string;
- /* String form to use for reparsing of EXP (malloc'd) or NULL. */
- char *exp_string_reparse;
-
- /* 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;
- /* The conditional expression if any. NULL if not a watchpoint. */
- struct expression *cond_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 *cond_exp_valid_block;
- /* 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;
- /* 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 of
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. */
- struct frame_id watchpoint_frame;
-
- /* Holds the thread which identifies the frame this watchpoint
- should be considered in scope for, or `null_ptid' if the
- watchpoint should be evaluated in all threads. */
- ptid_t watchpoint_thread;
-
- /* 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;
aborting, so you can back up to just before the abort. */
int hit_count;
- /* Process id of a child process whose forking triggered this
- catchpoint. This field is only valid immediately after this
- catchpoint has triggered. */
- ptid_t forked_inferior_pid;
-
- /* Filename of a program whose exec triggered this catchpoint.
- This field is only valid immediately after this catchpoint has
- triggered. */
- char *exec_pathname;
-
- /* Syscall numbers used for the 'catch syscall' feature. If no
- syscall has been specified for filtering, its value is NULL.
- Otherwise, it holds a list of all syscalls to be caught. The
- list elements are allocated with xmalloc. */
- VEC(int) *syscalls_to_be_caught;
-
- /* Methods associated with this breakpoint. */
- struct breakpoint_ops *ops;
-
/* Is breakpoint's condition not yet parsed because we found
no location initially so had no context to parse
the condition in. */
can sometimes be NULL for enabled GDBs as not all breakpoint
types are tracked by the Python scripting API. */
struct breakpoint_object *py_bp_object;
+ };
+
+/* An instance of this type is used to represent a watchpoint. It
+ includes a "struct breakpoint" as a kind of base class; users
+ downcast to "struct breakpoint *" when needed. */
+
+struct watchpoint
+{
+ /* The base class. */
+ struct breakpoint base;
+
+ /* String form of exp to use for displaying to the user (malloc'd),
+ or NULL if none. */
+ char *exp_string;
+ /* String form to use for reparsing of EXP (malloc'd) or NULL. */
+ char *exp_string_reparse;
+
+ /* 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;
+ /* The conditional expression if any. */
+ struct expression *cond_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 *cond_exp_valid_block;
+ /* 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;
+ /* 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 frame address which identifies the frame this
+ watchpoint should be evaluated in, or `null' if the watchpoint
+ should be evaluated on the outermost frame. */
+ struct frame_id watchpoint_frame;
+
+ /* Holds the thread which identifies the frame this watchpoint
+ should be considered in scope for, or `null_ptid' if the
+ watchpoint should be evaluated in all threads. */
+ ptid_t watchpoint_thread;
+
+ /* For hardware watchpoints, the triggered status according to the
+ hardware. */
+ enum watchpoint_triggered watchpoint_triggered;
+
+ /* Whether this watchpoint is exact (see
+ target_exact_watchpoints). */
+ int exact;
+
+ /* The mask address for a masked hardware watchpoint. */
+ CORE_ADDR hw_wp_mask;
};
+/* Returns true if BPT is really a watchpoint. */
+
+extern int is_watchpoint (const struct breakpoint *bpt);
+
typedef struct breakpoint *breakpoint_p;
DEF_VEC_P(breakpoint_p);
\f
BPSTAT_WHAT_KEEP_CHECKING. */
BPSTAT_WHAT_CLEAR_LONGJMP_RESUME,
+ /* Clear step resume breakpoint, and keep checking. */
+ BPSTAT_WHAT_STEP_RESUME,
+
/* 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
/* Stop and print. */
BPSTAT_WHAT_STOP_NOISY,
- /* Clear step resume breakpoint, and keep checking. */
- BPSTAT_WHAT_STEP_RESUME,
+ /* Clear step resume breakpoint, and keep checking. High-priority
+ step-resume breakpoints are used when even if there's a user
+ breakpoint at the current PC when we set the step-resume
+ breakpoint, we don't want to re-handle any breakpoint other
+ than the step-resume when it's hit; instead we want to move
+ past the breakpoint. This is used in the case of skipping
+ signal handlers. */
+ BPSTAT_WHAT_HP_STEP_RESUME,
};
/* An enum indicating the kind of "stack dummy" stop. This is a bit
print_it_done, print_it_noop. */
enum print_stop_action
{
+ /* We printed nothing or we need to do some more analysis. */
PRINT_UNKNOWN = -1,
+
+ /* We printed something, and we *do* desire that something to be
+ followed by a location. */
PRINT_SRC_AND_LOC,
+
+ /* We printed something, and we do *not* desire that something to
+ be followed by a location. */
PRINT_SRC_ONLY,
+
+ /* We already printed all we needed to print, don't print anything
+ else. */
PRINT_NOTHING
};
extern void until_break_command (char *, int, int);
+/* Initialize a struct bp_location. */
+
+extern void init_bp_location (struct bp_location *loc,
+ const struct bp_location_ops *ops,
+ struct breakpoint *owner);
+
+extern void update_breakpoint_locations (struct breakpoint *b,
+ struct symtabs_and_lines sals,
+ struct symtabs_and_lines sals_end);
+
extern void breakpoint_re_set (void);
extern void breakpoint_re_set_thread (struct breakpoint *);
is hit. */
extern struct command_line *breakpoint_commands (struct breakpoint *b);
+/* Return a string image of DISP. The string is static, and thus should
+ NOT be deallocated after use. */
+const char *bpdisp_text (enum bpdisp disp);
+
extern void break_command (char *, int);
extern void hbreak_command_wrapper (char *, int);
extern void rwatch_command_wrapper (char *, int, int);
extern void tbreak_command (char *, int);
+extern struct breakpoint_ops bkpt_breakpoint_ops;
+
+extern void initialize_breakpoint_ops (void);
+
+/* Arguments to pass as context to some catch command handlers. */
+#define CATCH_PERMANENT ((void *) (uintptr_t) 0)
+#define CATCH_TEMPORARY ((void *) (uintptr_t) 1)
+
+/* Like add_cmd, but add the command to both the "catch" and "tcatch"
+ lists, and pass some additional user data to the command
+ function. */
+
+extern void
+ add_catch_command (char *name, char *docstring,
+ void (*sfunc) (char *args, int from_tty,
+ struct cmd_list_element *command),
+ char **(*completer) (struct cmd_list_element *cmd,
+ char *text, char *word),
+ void *user_data_catch,
+ void *user_data_tcatch);
+
+/* Initialize a breakpoint struct for Ada exception catchpoints. */
+
+extern void
+ init_ada_exception_breakpoint (struct breakpoint *b,
+ struct gdbarch *gdbarch,
+ struct symtab_and_line sal,
+ char *addr_string,
+ struct breakpoint_ops *ops,
+ int tempflag,
+ int from_tty);
+
+/* Add breakpoint B on the breakpoint list, and notify the user, the
+ target and breakpoint_created observers of its existence. If
+ INTERNAL is non-zero, the breakpoint number will be allocated from
+ the internal breakpoint count. */
+
+extern void install_breakpoint (int internal, struct breakpoint *b);
+
extern int create_breakpoint (struct gdbarch *gdbarch, char *arg,
char *cond_string, int thread,
int parse_condition_and_thread,
/* These functions respectively disable or reenable all currently
enabled watchpoints. When disabled, the watchpoints are marked
- call_disabled. When reenabled, they are marked enabled.
+ call_disabled. When re-enabled, they are marked enabled.
The intended client of these functions is call_function_by_hand.
and that can cause execution control to become very confused.
Note that if a user sets breakpoints in an interactively called
- function, the call_disabled watchpoints will have been reenabled
+ function, the call_disabled watchpoints will have been re-enabled
when the first such breakpoint is reached. However, on targets
that are unable to unwind through the call dummy frame, watches
of stack-based storage may then be deleted, because gdb will
extern void clear_breakpoint_hit_counts (void);
-extern int get_number (char **);
-
-extern int get_number_or_range (char **);
-
extern struct breakpoint *get_breakpoint (int num);
/* The following are for displays, which aren't really breakpoints,
extern void breakpoint_set_commands (struct breakpoint *b,
struct command_line *commands);
+extern void breakpoint_set_silent (struct breakpoint *b, int silent);
+
+extern void breakpoint_set_thread (struct breakpoint *b, int thread);
+
+extern void breakpoint_set_task (struct breakpoint *b, int task);
+
/* Clear the "inserted" flag in all breakpoints. */
extern void mark_breakpoints_out (void);
extern struct breakpoint *create_thread_event_breakpoint (struct gdbarch *,
CORE_ADDR);
+extern void remove_jit_event_breakpoints (void);
+
extern void remove_solib_event_breakpoints (void);
extern void remove_thread_event_breakpoints (void);
deletes all breakpoints. */
extern void delete_command (char *arg, int from_tty);
-/* Pull all H/W watchpoints from the target. Return non-zero if the
- remove fails. */
-extern int remove_hw_watchpoints (void);
-
/* Manage a software single step breakpoint (or two). Insert may be
called twice before remove is called. */
extern void insert_single_step_breakpoint (struct gdbarch *,
Returns 0 if not, greater than 0 if we are. */
extern int catching_syscall_number (int syscall_number);
-/* Tell a breakpoint to be quiet. */
-extern void make_breakpoint_silent (struct breakpoint *);
-
/* Return a tracepoint with the given number if found. */
extern struct breakpoint *get_tracepoint (int num);
extern struct breakpoint *get_tracepoint_by_number_on_target (int num);
/* Find a tracepoint by parsing a number in the supplied string. */
-extern struct breakpoint *get_tracepoint_by_number (char **arg,
- int multi_p,
- int optional_p);
+extern struct breakpoint *
+ get_tracepoint_by_number (char **arg,
+ struct get_number_or_range_state *state,
+ int optional_p);
/* Return a vector of all tracepoints currently defined. The vector
is newly allocated; the caller should free when done with it. */
extern struct breakpoint *iterate_over_breakpoints (int (*) (struct breakpoint *,
void *), void *);
+extern int user_breakpoint_p (struct breakpoint *);
+
#endif /* !defined (BREAKPOINT_H) */