gdb/breakpoint.h

   1 /* Data structures associated with breakpoints in GDB.
   2    Copyright (C) 1992, 93, 94, 95, 96, 98, 1999 Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #if !defined (BREAKPOINT_H)
  22 #define BREAKPOINT_H 1
  23
  24 #include "frame.h"
  25 #include "value.h"
  26
  27 #include "gdb-events.h"
  28
  29 /* This is the maximum number of bytes a breakpoint instruction can take.
  30    Feel free to increase it.  It's just used in a few places to size
  31    arrays that should be independent of the target architecture.  */
  32
  33 #define BREAKPOINT_MAX  16
  34 \f
  35 /* Type of breakpoint. */
  36 /* FIXME In the future, we should fold all other breakpoint-like things into
  37    here.  This includes:
  38
  39    * single-step (for machines where we have to simulate single stepping)
  40    (probably, though perhaps it is better for it to look as much as
  41    possible like a single-step to wait_for_inferior).  */
  42
  43 enum bptype
  44   {
  45     bp_none = 0,                /* Eventpoint has been deleted. */
  46     bp_breakpoint,              /* Normal breakpoint */
  47     bp_hardware_breakpoint,     /* Hardware assisted breakpoint */
  48     bp_until,                   /* used by until command */
  49     bp_finish,                  /* used by finish command */
  50     bp_watchpoint,              /* Watchpoint */
  51     bp_hardware_watchpoint,     /* Hardware assisted watchpoint */
  52     bp_read_watchpoint,         /* read watchpoint, (hardware assisted) */
  53     bp_access_watchpoint,       /* access watchpoint, (hardware assisted) */
  54     bp_longjmp,                 /* secret breakpoint to find longjmp() */
  55     bp_longjmp_resume,          /* secret breakpoint to escape longjmp() */
  56
  57     /* Used by wait_for_inferior for stepping over subroutine calls, for
  58        stepping over signal handlers, and for skipping prologues.  */
  59     bp_step_resume,
  60
  61     /* Used by wait_for_inferior for stepping over signal handlers.  */
  62     bp_through_sigtramp,
  63
  64     /* Used to detect when a watchpoint expression has gone out of
  65        scope.  These breakpoints are usually not visible to the user.
  66
  67        This breakpoint has some interesting properties:
  68
  69        1) There's always a 1:1 mapping between watchpoints
  70        on local variables and watchpoint_scope breakpoints.
  71
  72        2) It automatically deletes itself and the watchpoint it's
  73        associated with when hit.
  74
  75        3) It can never be disabled.  */
  76     bp_watchpoint_scope,
  77
  78     /* The breakpoint at the end of a call dummy.  */
  79     /* FIXME: What if the function we are calling longjmp()s out of the
  80        call, or the user gets out with the "return" command?  We currently
  81        have no way of cleaning up the breakpoint in these (obscure) situations.
  82        (Probably can solve this by noticing longjmp, "return", etc., it's
  83        similar to noticing when a watchpoint on a local variable goes out
  84        of scope (with hardware support for watchpoints)).  */
  85     bp_call_dummy,
  86
  87     /* Some dynamic linkers (HP, maybe Solaris) can arrange for special
  88        code in the inferior to run when significant events occur in the
  89        dynamic linker (for example a library is loaded or unloaded).
  90
  91        By placing a breakpoint in this magic code GDB will get control
  92        when these significant events occur.  GDB can then re-examine
  93        the dynamic linker's data structures to discover any newly loaded
  94        dynamic libraries.  */
  95     bp_shlib_event,
  96
  97     /* These breakpoints are used to implement the "catch load" command
  98        on platforms whose dynamic linkers support such functionality.  */
  99     bp_catch_load,
 100
 101     /* These breakpoints are used to implement the "catch unload" command
 102        on platforms whose dynamic linkers support such functionality.  */
 103     bp_catch_unload,
 104
 105     /* These are not really breakpoints, but are catchpoints that
 106        implement the "catch fork", "catch vfork" and "catch exec" commands
 107        on platforms whose kernel support such functionality.  (I.e.,
 108        kernels which can raise an event when a fork or exec occurs, as
 109        opposed to the debugger setting breakpoints on functions named
 110        "fork" or "exec".) */
 111     bp_catch_fork,
 112     bp_catch_vfork,
 113     bp_catch_exec,
 114
 115     /* These are catchpoints to implement "catch catch" and "catch throw"
 116        commands for C++ exception handling. */
 117     bp_catch_catch,
 118     bp_catch_throw
 119
 120
 121   };
 122
 123 /* States of enablement of breakpoint. */
 124
 125 enum enable
 126   {
 127     disabled,           /* The eventpoint is inactive, and cannot trigger. */
 128     enabled,            /* The eventpoint is active, and can trigger. */
 129     shlib_disabled,     /* The eventpoint's address is in an unloaded solib.
 130                            The eventpoint will be automatically enabled
 131                            and reset when that solib is loaded. */
 132     call_disabled,      /* The eventpoint has been disabled while a call
 133                            into the inferior is "in flight", because some
 134                            eventpoints interfere with the implementation of
 135                            a call on some targets.  The eventpoint will be
 136                            automatically enabled and reset when the call
 137                            "lands" (either completes, or stops at another
 138                            eventpoint). */
 139     permanent           /* There is a breakpoint instruction hard-wired into
 140                            the target's code.  Don't try to write another
 141                            breakpoint instruction on top of it, or restore
 142                            its value.  Step over it using the architecture's
 143                            SKIP_INSN macro.  */
 144   };
 145
 146
 147 /* Disposition of breakpoint.  Ie: what to do after hitting it. */
 148
 149 enum bpdisp
 150   {
 151     del,                        /* Delete it */
 152     del_at_next_stop,           /* Delete at next stop, whether hit or not */
 153     disable,                    /* Disable it */
 154     donttouch                   /* Leave it alone */
 155   };
 156
 157 enum target_hw_bp_type
 158   {
 159     hw_write   = 0,             /* Common  HW watchpoint */
 160     hw_read    = 1,             /* Read    HW watchpoint */
 161     hw_access  = 2,             /* Access  HW watchpoint */
 162     hw_execute = 3              /* Execute HW breakpoint */
 163   };
 164
 165 /* Note that the ->silent field is not currently used by any commands
 166    (though the code is in there if it was to be, and set_raw_breakpoint
 167    does set it to 0).  I implemented it because I thought it would be
 168    useful for a hack I had to put in; I'm going to leave it in because
 169    I can see how there might be times when it would indeed be useful */
 170
 171 /* This is for a breakpoint or a watchpoint.  */
 172
 173 struct breakpoint
 174   {
 175     struct breakpoint *next;
 176     /* Type of breakpoint. */
 177     enum bptype type;
 178     /* Zero means disabled; remember the info but don't break here.  */
 179     enum enable enable;
 180     /* What to do with this breakpoint after we hit it. */
 181     enum bpdisp disposition;
 182     /* Number assigned to distinguish breakpoints.  */
 183     int number;
 184
 185     /* Address to break at, or NULL if not a breakpoint.  */
 186     CORE_ADDR address;
 187
 188     /* Line number of this address.  Only matters if address is
 189        non-NULL.  */
 190
 191     int line_number;
 192
 193     /* Source file name of this address.  Only matters if address is
 194        non-NULL.  */
 195
 196     char *source_file;
 197
 198     /* Non-zero means a silent breakpoint (don't print frame info
 199        if we stop here). */
 200     unsigned char silent;
 201     /* Number of stops at this breakpoint that should
 202        be continued automatically before really stopping.  */
 203     int ignore_count;
 204     /* "Real" contents of byte where breakpoint has been inserted.
 205        Valid only when breakpoints are in the program.  Under the complete
 206        control of the target insert_breakpoint and remove_breakpoint routines.
 207        No other code should assume anything about the value(s) here.  */
 208     char shadow_contents[BREAKPOINT_MAX];
 209     /* Nonzero if this breakpoint is now inserted.  Only matters if address
 210        is non-NULL.  */
 211     char inserted;
 212     /* Nonzero if this is not the first breakpoint in the list
 213        for the given address.  Only matters if address is non-NULL.  */
 214     char duplicate;
 215     /* Chain of command lines to execute when this breakpoint is hit.  */
 216     struct command_line *commands;
 217     /* Stack depth (address of frame).  If nonzero, break only if fp
 218        equals this.  */
 219     CORE_ADDR frame;
 220     /* Conditional.  Break only if this expression's value is nonzero.  */
 221     struct expression *cond;
 222
 223     /* String we used to set the breakpoint (malloc'd).  Only matters if
 224        address is non-NULL.  */
 225     char *addr_string;
 226     /* Language we used to set the breakpoint.  */
 227     enum language language;
 228     /* Input radix we used to set the breakpoint.  */
 229     int input_radix;
 230     /* String form of the breakpoint condition (malloc'd), or NULL if there
 231        is no condition.  */
 232     char *cond_string;
 233     /* String form of exp (malloc'd), or NULL if none.  */
 234     char *exp_string;
 235
 236     /* The expression we are watching, or NULL if not a watchpoint.  */
 237     struct expression *exp;
 238     /* The largest block within which it is valid, or NULL if it is
 239        valid anywhere (e.g. consists just of global symbols).  */
 240     struct block *exp_valid_block;
 241     /* Value of the watchpoint the last time we checked it.  */
 242     value_ptr val;
 243
 244     /* Holds the value chain for a hardware watchpoint expression.  */
 245     value_ptr val_chain;
 246
 247     /* Holds the address of the related watchpoint_scope breakpoint
 248        when using watchpoints on local variables (might the concept
 249        of a related breakpoint be useful elsewhere, if not just call
 250        it the watchpoint_scope breakpoint or something like that. FIXME).  */
 251     struct breakpoint *related_breakpoint;
 252
 253     /* Holds the frame address which identifies the frame this watchpoint
 254        should be evaluated in, or NULL if the watchpoint should be evaluated
 255        on the outermost frame.  */
 256     CORE_ADDR watchpoint_frame;
 257
 258     /* Thread number for thread-specific breakpoint, or -1 if don't care */
 259     int thread;
 260
 261     /* Count of the number of times this breakpoint was taken, dumped
 262        with the info, but not used for anything else.  Useful for
 263        seeing how many times you hit a break prior to the program
 264        aborting, so you can back up to just before the abort.  */
 265     int hit_count;
 266
 267     /* Filename of a dynamically-linked library (dll), used for
 268        bp_catch_load and bp_catch_unload (malloc'd), or NULL if any
 269        library is significant.  */
 270     char *dll_pathname;
 271
 272     /* Filename of a dll whose state change (e.g., load or unload)
 273        triggered this catchpoint.  This field is only vaid immediately
 274        after this catchpoint has triggered.  */
 275     char *triggered_dll_pathname;
 276
 277     /* Process id of a child process whose forking triggered this
 278        catchpoint.  This field is only vaid immediately after this
 279        catchpoint has triggered.  */
 280     int forked_inferior_pid;
 281
 282     /* Filename of a program whose exec triggered this catchpoint.
 283        This field is only vaid immediately after this catchpoint has
 284        triggered.  */
 285     char *exec_pathname;
 286
 287     asection *section;
 288   };
 289 \f
 290 /* The following stuff is an abstract data type "bpstat" ("breakpoint
 291    status").  This provides the ability to determine whether we have
 292    stopped at a breakpoint, and what we should do about it.  */
 293
 294 typedef struct bpstats *bpstat;
 295
 296 /* Interface:  */
 297 /* Clear a bpstat so that it says we are not at any breakpoint.
 298    Also free any storage that is part of a bpstat.  */
 299 extern void bpstat_clear PARAMS ((bpstat *));
 300
 301 /* Return a copy of a bpstat.  Like "bs1 = bs2" but all storage that
 302    is part of the bpstat is copied as well.  */
 303 extern bpstat bpstat_copy PARAMS ((bpstat));
 304
 305 extern bpstat bpstat_stop_status PARAMS ((CORE_ADDR *, int));
 306 \f
 307 /* This bpstat_what stuff tells wait_for_inferior what to do with a
 308    breakpoint (a challenging task).  */
 309
 310 enum bpstat_what_main_action
 311   {
 312     /* Perform various other tests; that is, this bpstat does not
 313        say to perform any action (e.g. failed watchpoint and nothing
 314        else).  */
 315     BPSTAT_WHAT_KEEP_CHECKING,
 316
 317     /* Rather than distinguish between noisy and silent stops here, it
 318        might be cleaner to have bpstat_print make that decision (also
 319        taking into account stop_print_frame and source_only).  But the
 320        implications are a bit scary (interaction with auto-displays, etc.),
 321        so I won't try it.  */
 322
 323     /* Stop silently.  */
 324     BPSTAT_WHAT_STOP_SILENT,
 325
 326     /* Stop and print.  */
 327     BPSTAT_WHAT_STOP_NOISY,
 328
 329     /* Remove breakpoints, single step once, then put them back in and
 330        go back to what we were doing.  It's possible that this should be
 331        removed from the main_action and put into a separate field, to more
 332        cleanly handle BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE.  */
 333     BPSTAT_WHAT_SINGLE,
 334
 335     /* Set longjmp_resume breakpoint, remove all other breakpoints,
 336        and continue.  The "remove all other breakpoints" part is required
 337        if we are also stepping over another breakpoint as well as doing
 338        the longjmp handling.  */
 339     BPSTAT_WHAT_SET_LONGJMP_RESUME,
 340
 341     /* Clear longjmp_resume breakpoint, then handle as
 342        BPSTAT_WHAT_KEEP_CHECKING.  */
 343     BPSTAT_WHAT_CLEAR_LONGJMP_RESUME,
 344
 345     /* Clear longjmp_resume breakpoint, then handle as BPSTAT_WHAT_SINGLE.  */
 346     BPSTAT_WHAT_CLEAR_LONGJMP_RESUME_SINGLE,
 347
 348     /* Clear step resume breakpoint, and keep checking.  */
 349     BPSTAT_WHAT_STEP_RESUME,
 350
 351     /* Clear through_sigtramp breakpoint, muck with trap_expected, and keep
 352        checking.  */
 353     BPSTAT_WHAT_THROUGH_SIGTRAMP,
 354
 355     /* Check the dynamic linker's data structures for new libraries, then
 356        keep checking.  */
 357     BPSTAT_WHAT_CHECK_SHLIBS,
 358
 359     /* Check the dynamic linker's data structures for new libraries, then
 360        resume out of the dynamic linker's callback, stop and print.  */
 361     BPSTAT_WHAT_CHECK_SHLIBS_RESUME_FROM_HOOK,
 362
 363     /* This is just used to keep track of how many enums there are.  */
 364     BPSTAT_WHAT_LAST
 365   };
 366
 367 struct bpstat_what
 368   {
 369     enum bpstat_what_main_action main_action;
 370
 371     /* Did we hit a call dummy breakpoint?  This only goes with a main_action
 372        of BPSTAT_WHAT_STOP_SILENT or BPSTAT_WHAT_STOP_NOISY (the concept of
 373        continuing from a call dummy without popping the frame is not a
 374        useful one).  */
 375     int call_dummy;
 376   };
 377
 378 /* Tell what to do about this bpstat.  */
 379 struct bpstat_what bpstat_what PARAMS ((bpstat));
 380 \f
 381 /* Find the bpstat associated with a breakpoint.  NULL otherwise. */
 382 bpstat bpstat_find_breakpoint PARAMS ((bpstat, struct breakpoint *));
 383
 384 /* Find a step_resume breakpoint associated with this bpstat.
 385    (If there are multiple step_resume bp's on the list, this function
 386    will arbitrarily pick one.)
 387
 388    It is an error to use this function if BPSTAT doesn't contain a
 389    step_resume breakpoint.
 390
 391    See wait_for_inferior's use of this function.
 392  */
 393 extern struct breakpoint *
 394   bpstat_find_step_resume_breakpoint PARAMS ((bpstat));
 395
 396 /* Nonzero if a signal that we got in wait() was due to circumstances
 397    explained by the BS.  */
 398 /* Currently that is true if we have hit a breakpoint, or if there is
 399    a watchpoint enabled.  */
 400 #define bpstat_explains_signal(bs) ((bs) != NULL)
 401
 402 /* Nonzero if we should step constantly (e.g. watchpoints on machines
 403    without hardware support).  This isn't related to a specific bpstat,
 404    just to things like whether watchpoints are set.  */
 405 extern int bpstat_should_step PARAMS ((void));
 406
 407 /* Nonzero if there are enabled hardware watchpoints. */
 408 extern int bpstat_have_active_hw_watchpoints PARAMS ((void));
 409
 410 /* Print a message indicating what happened.  Returns nonzero to
 411    say that only the source line should be printed after this (zero
 412    return means print the frame as well as the source line).  */
 413 extern int bpstat_print PARAMS ((bpstat));
 414
 415 /* Return the breakpoint number of the first breakpoint we are stopped
 416    at.  *BSP upon return is a bpstat which points to the remaining
 417    breakpoints stopped at (but which is not guaranteed to be good for
 418    anything but further calls to bpstat_num).
 419    Return 0 if passed a bpstat which does not indicate any breakpoints.  */
 420 extern int bpstat_num PARAMS ((bpstat *));
 421
 422 /* Perform actions associated with having stopped at *BSP.  Actually, we just
 423    use this for breakpoint commands.  Perhaps other actions will go here
 424    later, but this is executed at a late time (from the command loop).  */
 425 extern void bpstat_do_actions PARAMS ((bpstat *));
 426
 427 /* Modify BS so that the actions will not be performed.  */
 428 extern void bpstat_clear_actions PARAMS ((bpstat));
 429
 430 /* Given a bpstat that records zero or more triggered eventpoints, this
 431    function returns another bpstat which contains only the catchpoints
 432    on that first list, if any.
 433  */
 434 extern void bpstat_get_triggered_catchpoints PARAMS ((bpstat, bpstat *));
 435
 436 /* Implementation:  */
 437 struct bpstats
 438   {
 439     /* Linked list because there can be two breakpoints at the same
 440        place, and a bpstat reflects the fact that both have been hit.  */
 441     bpstat next;
 442     /* Breakpoint that we are at.  */
 443     struct breakpoint *breakpoint_at;
 444     /* Commands left to be done.  */
 445     struct command_line *commands;
 446     /* Old value associated with a watchpoint.  */
 447     value_ptr old_val;
 448
 449     /* Nonzero if this breakpoint tells us to print the frame.  */
 450     char print;
 451
 452     /* Nonzero if this breakpoint tells us to stop.  */
 453     char stop;
 454
 455     /* Function called by bpstat_print to print stuff associated with
 456        this element of the bpstat chain.  Returns 0 or 1 just like
 457        bpstat_print, or -1 if it can't deal with it.  */
 458     enum print_stop_action (*print_it) PARAMS ((bpstat bs));
 459   };
 460
 461 enum inf_context
 462   {
 463     inf_starting,
 464     inf_running,
 465     inf_exited
 466   };
 467
 468 /* The possible return values for breakpoint_here_p.
 469    We guarantee that zero always means "no breakpoint here".  */
 470 enum breakpoint_here
 471   {
 472     no_breakpoint_here = 0,
 473     ordinary_breakpoint_here,
 474     permanent_breakpoint_here
 475   };
 476
 477 /* The possible return values for print_bpstat, print_it_normal,
 478    print_it_done, print_it_noop. */
 479 enum print_stop_action
 480   {
 481     PRINT_UNKNOWN = -1,
 482     PRINT_SRC_AND_LOC,
 483     PRINT_SRC_ONLY,
 484     PRINT_NOTHING
 485   };
 486 \f
 487
 488 /* Prototypes for breakpoint-related functions.  */
 489
 490 /* Forward declarations for prototypes */
 491 struct frame_info;
 492
 493 extern enum breakpoint_here breakpoint_here_p PARAMS ((CORE_ADDR));
 494
 495 extern int breakpoint_inserted_here_p PARAMS ((CORE_ADDR));
 496
 497 extern int frame_in_dummy PARAMS ((struct frame_info *));
 498
 499 extern int breakpoint_thread_match PARAMS ((CORE_ADDR, int));
 500
 501 extern void until_break_command PARAMS ((char *, int));
 502
 503 extern void breakpoint_re_set PARAMS ((void));
 504
 505 extern void breakpoint_re_set_thread PARAMS ((struct breakpoint *));
 506
 507 extern int ep_is_exception_catchpoint PARAMS ((struct breakpoint *));
 508
 509 extern struct breakpoint *set_momentary_breakpoint
 510   PARAMS ((struct symtab_and_line, struct frame_info *, enum bptype));
 511
 512 extern void set_ignore_count PARAMS ((int, int, int));
 513
 514 extern void set_default_breakpoint PARAMS ((int, CORE_ADDR,
 515                                             struct symtab *, int));
 516
 517 extern void mark_breakpoints_out PARAMS ((void));
 518
 519 extern void breakpoint_init_inferior PARAMS ((enum inf_context));
 520
 521 extern void delete_breakpoint PARAMS ((struct breakpoint *));
 522
 523 extern void breakpoint_auto_delete PARAMS ((bpstat));
 524
 525 extern void breakpoint_clear_ignore_counts PARAMS ((void));
 526
 527 extern void break_command PARAMS ((char *, int));
 528
 529 extern void tbreak_command PARAMS ((char *, int));
 530
 531 extern int insert_breakpoints PARAMS ((void));
 532
 533 extern int remove_breakpoints PARAMS ((void));
 534
 535 /* This function can be used to physically insert eventpoints from the
 536    specified traced inferior process, without modifying the breakpoint
 537    package's state.  This can be useful for those targets which support
 538    following the processes of a fork() or vfork() system call, when both
 539    of the resulting two processes are to be followed.  */
 540 extern int reattach_breakpoints PARAMS ((int));
 541
 542 /* This function can be used to update the breakpoint package's state
 543    after an exec() system call has been executed.
 544
 545    This function causes the following:
 546
 547    - All eventpoints are marked "not inserted".
 548    - All eventpoints with a symbolic address are reset such that
 549    the symbolic address must be reevaluated before the eventpoints
 550    can be reinserted.
 551    - The solib breakpoints are explicitly removed from the breakpoint
 552    list.
 553    - A step-resume breakpoint, if any, is explicitly removed from the
 554    breakpoint list.
 555    - All eventpoints without a symbolic address are removed from the
 556    breakpoint list. */
 557 extern void update_breakpoints_after_exec PARAMS ((void));
 558
 559 /* This function can be used to physically remove hardware breakpoints
 560    and watchpoints from the specified traced inferior process, without
 561    modifying the breakpoint package's state.  This can be useful for
 562    those targets which support following the processes of a fork() or
 563    vfork() system call, when one of the resulting two processes is to
 564    be detached and allowed to run free.
 565
 566    It is an error to use this function on the process whose id is
 567    inferior_pid.  */
 568 extern int detach_breakpoints PARAMS ((int));
 569
 570 extern void enable_longjmp_breakpoint PARAMS ((void));
 571
 572 extern void disable_longjmp_breakpoint PARAMS ((void));
 573
 574 extern void set_longjmp_resume_breakpoint PARAMS ((CORE_ADDR,
 575                                                    struct frame_info *));
 576 /* These functions respectively disable or reenable all currently
 577    enabled watchpoints.  When disabled, the watchpoints are marked
 578    call_disabled.  When reenabled, they are marked enabled.
 579
 580    The intended client of these functions is infcmd.c\run_stack_dummy.
 581
 582    The inferior must be stopped, and all breakpoints removed, when
 583    these functions are used.
 584
 585    The need for these functions is that on some targets (e.g., HP-UX),
 586    gdb is unable to unwind through the dummy frame that is pushed as
 587    part of the implementation of a call command.  Watchpoints can
 588    cause the inferior to stop in places where this frame is visible,
 589    and that can cause execution control to become very confused.
 590
 591    Note that if a user sets breakpoints in an interactively call
 592    function, the call_disabled watchpoints will have been reenabled
 593    when the first such breakpoint is reached.  However, on targets
 594    that are unable to unwind through the call dummy frame, watches
 595    of stack-based storage may then be deleted, because gdb will
 596    believe that their watched storage is out of scope.  (Sigh.) */
 597 extern void
 598 disable_watchpoints_before_interactive_call_start PARAMS ((void));
 599
 600 extern void
 601 enable_watchpoints_after_interactive_call_stop PARAMS ((void));
 602
 603
 604 extern void clear_breakpoint_hit_counts PARAMS ((void));
 605
 606 /* The following are for displays, which aren't really breakpoints, but
 607    here is as good a place as any for them.  */
 608
 609 extern void disable_current_display PARAMS ((void));
 610
 611 extern void do_displays PARAMS ((void));
 612
 613 extern void disable_display PARAMS ((int));
 614
 615 extern void clear_displays PARAMS ((void));
 616
 617 extern void disable_breakpoint PARAMS ((struct breakpoint *));
 618
 619 extern void enable_breakpoint PARAMS ((struct breakpoint *));
 620
 621 extern void make_breakpoint_permanent PARAMS ((struct breakpoint *));
 622
 623 extern struct breakpoint *create_solib_event_breakpoint PARAMS ((CORE_ADDR));
 624
 625 extern void remove_solib_event_breakpoints PARAMS ((void));
 626
 627 extern void disable_breakpoints_in_shlibs PARAMS ((int silent));
 628
 629 extern void re_enable_breakpoints_in_shlibs PARAMS ((void));
 630
 631 extern void create_solib_load_event_breakpoint PARAMS ((char *, int,
 632                                                         char *, char *));
 633
 634 extern void create_solib_unload_event_breakpoint PARAMS ((char *, int,
 635                                                           char *, char *));
 636
 637 extern void create_fork_event_catchpoint PARAMS ((int, char *));
 638
 639 extern void create_vfork_event_catchpoint PARAMS ((int, char *));
 640
 641 extern void create_exec_event_catchpoint PARAMS ((int, char *));
 642
 643 /* This function returns TRUE if ep is a catchpoint. */
 644 extern int ep_is_catchpoint PARAMS ((struct breakpoint *));
 645
 646 /* This function returns TRUE if ep is a catchpoint of a
 647    shared library (aka dynamically-linked library) event,
 648    such as a library load or unload. */
 649 extern int ep_is_shlib_catchpoint PARAMS ((struct breakpoint *));
 650
 651 extern struct breakpoint *set_breakpoint_sal PARAMS ((struct symtab_and_line));
 652
 653 /* Enable breakpoints and delete when hit.  Called with ARG == NULL
 654    deletes all breakpoints. */
 655 extern void delete_command (char *arg, int from_tty);
 656
 657 #endif /* !defined (BREAKPOINT_H) */