/* Data structures associated with breakpoints in GDB.
- Copyright (C) 1992, 1993, 1994, 1995, 1996 Free Software Foundation, Inc.
+ Copyright (C) 1992, 93, 94, 95, 96, 1998 Free Software Foundation, Inc.
This file is part of GDB.
possible like a single-step to wait_for_inferior). */
enum bptype {
+ bp_none = 0, /* Eventpoint has been deleted. */
bp_breakpoint, /* Normal breakpoint */
bp_hardware_breakpoint, /* Hardware assisted breakpoint */
bp_until, /* used by until command */
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
+ bp_shlib_event,
+
+ /* These breakpoints are used to implement the "catch load" command
+ on platforms whose dynamic linkers support such functionality. */
+ bp_catch_load,
+
+ /* These breakpoints are used to implement the "catch unload" command
+ on platforms whose dynamic linkers support such functionality. */
+ bp_catch_unload,
+
+ /* These are not really breakpoints, but are catchpoints that
+ implement the "catch fork", "catch vfork" and "catch exec" commands
+ on platforms whose kernel support such functionality. (I.e.,
+ kernels which can raise an event when a fork or exec occurs, as
+ opposed to the debugger setting breakpoints on functions named
+ "fork" or "exec".) */
+ 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. */
-enum enable { disabled, enabled, shlib_disabled};
+enum enable {
+ disabled, /* The eventpoint is inactive, and cannot trigger. */
+ enabled, /* The eventpoint is active, and can trigger. */
+ shlib_disabled, /* The eventpoint's address is within an unloaded solib.
+ The eventpoint will be automatically enabled & reset
+ when that solib is loaded. */
+ call_disabled /* The eventpoint has been disabled while a call into
+ the inferior is "in flight", because some eventpoints
+ interfere with the implementation of a call on some
+ targets. The eventpoint will be automatically enabled
+ & reset when the call "lands" (either completes, or
+ stops at another eventpoint). */
+};
+
/* Disposition of breakpoint. Ie: what to do after hitting it. */
aborting, so you can back up to just before the abort. */
int hit_count;
+ /* Filename of a dynamically-linked library (dll), used for bp_catch_load
+ and bp_catch_unload (malloc'd), or NULL if any library is significant. */
+ char * dll_pathname;
+
+ /* Filename of a dll whose state change (e.g., load or unload)
+ triggered this catchpoint. This field is only vaid immediately
+ after this catchpoint has triggered. */
+ char * triggered_dll_pathname;
+
+ /* Process id of a child process whose forking triggered this catchpoint.
+ This field is only vaid immediately after this catchpoint has triggered. */
+ int forked_inferior_pid;
+
+ /* Filename of a program whose exec triggered this catchpoint. This
+ field is only vaid immediately after this catchpoint has triggered. */
+ char * exec_pathname;
+
+ asection *section;
};
\f
/* The following stuff is an abstract data type "bpstat" ("breakpoint status").
keep checking. */
BPSTAT_WHAT_CHECK_SHLIBS,
+ /* Check the dynamic linker's data structures for new libraries, then
+ resume out of the dynamic linker's callback, stop and print. */
+ BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK,
+
/* This is just used to keep track of how many enums there are. */
BPSTAT_WHAT_LAST
};
/* Find the bpstat associated with a breakpoint. NULL otherwise. */
bpstat bpstat_find_breakpoint PARAMS ((bpstat, struct breakpoint *));
+/* Find a step_resume breakpoint associated with this bpstat.
+ (If there are multiple step_resume bp's on the list, this function
+ will arbitrarily pick one.)
+
+ It is an error to use this function if BPSTAT doesn't contain a
+ step_resume breakpoint.
+
+ See wait_for_inferior's use of this function.
+ */
+extern struct breakpoint *
+bpstat_find_step_resume_breakpoint PARAMS ((bpstat));
+
/* 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
just to things like whether watchpoints are set. */
extern int bpstat_should_step PARAMS ((void));
+/* Nonzero if there are enabled hardware watchpoints. */
+extern int bpstat_have_active_hw_watchpoints 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). */
/* Modify BS so that the actions will not be performed. */
extern void bpstat_clear_actions PARAMS ((bpstat));
+/* Given a bpstat that records zero or more triggered eventpoints, this
+ function returns another bpstat which contains only the catchpoints
+ on that first list, if any.
+ */
+extern void bpstat_get_triggered_catchpoints PARAMS ((bpstat, bpstat *));
+
/* Implementation: */
struct bpstats
{
bpstat_print, or -1 if it can't deal with it. */
int (*print_it) PARAMS((bpstat bs));
};
+
+enum inf_context
+{
+ inf_starting,
+ inf_running,
+ inf_exited
+};
+
\f
/* Prototypes for breakpoint-related functions. */
extern int breakpoint_here_p PARAMS ((CORE_ADDR));
+extern int breakpoint_inserted_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 breakpoint_re_set PARAMS ((void));
-extern void clear_momentary_breakpoints PARAMS ((void));
+extern void breakpoint_re_set_thread PARAMS ((struct breakpoint *));
+
extern struct breakpoint *set_momentary_breakpoint
PARAMS ((struct symtab_and_line, struct frame_info *, enum bptype));
extern void mark_breakpoints_out PARAMS ((void));
-extern void breakpoint_init_inferior PARAMS ((void));
+extern void breakpoint_init_inferior PARAMS ((enum inf_context));
extern void delete_breakpoint PARAMS ((struct breakpoint *));
extern void break_command PARAMS ((char *, int));
+extern void tbreak_command PARAMS ((char *, int));
+
extern int insert_breakpoints PARAMS ((void));
extern int remove_breakpoints PARAMS ((void));
+/* This function can be used to physically insert eventpoints from the
+ specified traced inferior process, without modifying the breakpoint
+ package's state. This can be useful for those targets which support
+ following the processes of a fork() or vfork() system call, when both
+ of the resulting two processes are to be followed. */
+extern int reattach_breakpoints PARAMS ((int));
+
+/* This function can be used to update the breakpoint package's state
+ after an exec() system call has been executed.
+
+ This function causes the following:
+
+ - All eventpoints are marked "not inserted".
+ - All eventpoints with a symbolic address are reset such that
+ the symbolic address must be reevaluated before the eventpoints
+ can be reinserted.
+ - The solib breakpoints are explicitly removed from the breakpoint
+ list.
+ - A step-resume breakpoint, if any, is explicitly removed from the
+ breakpoint list.
+ - All eventpoints without a symbolic address are removed from the
+ breakpoint list. */
+extern void update_breakpoints_after_exec PARAMS ((void));
+
+/* This function can be used to physically remove hardware breakpoints
+ and watchpoints from the specified traced inferior process, without
+ modifying the breakpoint package's state. This can be useful for
+ those targets which support following the processes of a fork() or
+ vfork() system call, when one of the resulting two processes is to
+ be detached and allowed to run free.
+
+ It is an error to use this function on the process whose id is
+ inferior_pid. */
+extern int detach_breakpoints PARAMS ((int));
+
extern void enable_longjmp_breakpoint PARAMS ((void));
extern void disable_longjmp_breakpoint PARAMS ((void));
extern void set_longjmp_resume_breakpoint PARAMS ((CORE_ADDR,
struct frame_info *));
+/* These functions respectively disable or reenable all currently
+ enabled watchpoints. When disabled, the watchpoints are marked
+ call_disabled. When reenabled, they are marked enabled.
+
+ The intended client of these functions is infcmd.c\run_stack_dummy.
+
+ The inferior must be stopped, and all breakpoints removed, when
+ these functions are used.
+
+ The need for these functions is that on some targets (e.g., HP-UX),
+ gdb is unable to unwind through the dummy frame that is pushed as
+ part of the implementation of a call command. Watchpoints can
+ cause the inferior to stop in places where this frame is visible,
+ and that can cause execution control to become very confused.
+
+ Note that if a user sets breakpoints in an interactively call
+ function, the call_disabled watchpoints will have been reenabled
+ 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
+ believe that their watched storage is out of scope. (Sigh.) */
+extern void
+disable_watchpoints_before_interactive_call_start PARAMS ((void));
+
+extern void
+enable_watchpoints_after_interactive_call_stop PARAMS ((void));
+
extern void clear_breakpoint_hit_counts PARAMS ((void));
extern void remove_solib_event_breakpoints PARAMS ((void));
+extern void disable_breakpoints_in_shlibs PARAMS ((void));
+
extern void re_enable_breakpoints_in_shlibs PARAMS ((void));
+extern void create_solib_load_event_breakpoint PARAMS ((char *, int, char *, char *));
+
+extern void create_solib_unload_event_breakpoint PARAMS ((char *, int, char *, char *));
+
+extern void create_fork_event_catchpoint PARAMS ((int, char *));
+
+extern void create_vfork_event_catchpoint PARAMS ((int, char *));
+
+extern void create_exec_event_catchpoint PARAMS ((int, char *));
+
+/* This function returns TRUE if ep is a catchpoint. */
+extern int ep_is_catchpoint PARAMS ((struct breakpoint *));
+
+/* This function returns TRUE if ep is a catchpoint of a
+ shared library (aka dynamically-linked library) event,
+ such as a library load or unload. */
+extern int ep_is_shlib_catchpoint PARAMS ((struct breakpoint *));
+
+extern struct breakpoint *set_breakpoint_sal PARAMS ((struct symtab_and_line));
+
#endif /* !defined (BREAKPOINT_H) */
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