gdb/guile/scm-breakpoint.c

   1 /* Scheme interface to breakpoints.
   2
   3    Copyright (C) 2008-2017 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 /* See README file in this directory for implementation notes, coding
  21    conventions, et.al.  */
  22
  23 #include "defs.h"
  24 #include "value.h"
  25 #include "breakpoint.h"
  26 #include "gdbcmd.h"
  27 #include "gdbthread.h"
  28 #include "observer.h"
  29 #include "cli/cli-script.h"
  30 #include "ada-lang.h"
  31 #include "arch-utils.h"
  32 #include "language.h"
  33 #include "guile-internal.h"
  34 #include "location.h"
  35
  36 /* The <gdb:breakpoint> smob.
  37    N.B.: The name of this struct is known to breakpoint.h.
  38
  39    Note: Breakpoints are added to gdb using a two step process:
  40    1) Call make-breakpoint to create a <gdb:breakpoint> object.
  41    2) Call register-breakpoint! to add the breakpoint to gdb.
  42    It is done this way so that the constructor, make-breakpoint, doesn't have
  43    any side-effects.  This means that the smob needs to store everything
  44    that was passed to make-breakpoint.  */
  45
  46 typedef struct gdbscm_breakpoint_object
  47 {
  48   /* This always appears first.  */
  49   gdb_smob base;
  50
  51   /* Non-zero if this breakpoint was created with make-breakpoint.  */
  52   int is_scheme_bkpt;
  53
  54   /* For breakpoints created with make-breakpoint, these are the parameters
  55      that were passed to make-breakpoint.  These values are not used except
  56      to register the breakpoint with GDB.  */
  57   struct
  58   {
  59     /* The string representation of the breakpoint.
  60        Space for this lives in GC space.  */
  61     char *location;
  62
  63     /* The kind of breakpoint.
  64        At the moment this can only be one of bp_breakpoint, bp_watchpoint.  */
  65     enum bptype type;
  66
  67     /* If a watchpoint, the kind of watchpoint.  */
  68     enum target_hw_bp_type access_type;
  69
  70     /* Non-zero if the breakpoint is an "internal" breakpoint.  */
  71     int is_internal;
  72   } spec;
  73
  74   /* The breakpoint number according to gdb.
  75      For breakpoints created from Scheme, this has the value -1 until the
  76      breakpoint is registered with gdb.
  77      This is recorded here because BP will be NULL when deleted.  */
  78   int number;
  79
  80   /* The gdb breakpoint object, or NULL if the breakpoint has not been
  81      registered yet, or has been deleted.  */
  82   struct breakpoint *bp;
  83
  84   /* Backlink to our containing <gdb:breakpoint> smob.
  85      This is needed when we are deleted, we need to unprotect the object
  86      from GC.  */
  87   SCM containing_scm;
  88
  89   /* A stop condition or #f.  */
  90   SCM stop;
  91 } breakpoint_smob;
  92
  93 static const char breakpoint_smob_name[] = "gdb:breakpoint";
  94
  95 /* The tag Guile knows the breakpoint smob by.  */
  96 static scm_t_bits breakpoint_smob_tag;
  97
  98 /* Variables used to pass information between the breakpoint_smob
  99    constructor and the breakpoint-created hook function.  */
 100 static SCM pending_breakpoint_scm = SCM_BOOL_F;
 101
 102 /* Keywords used by create-breakpoint!.  */
 103 static SCM type_keyword;
 104 static SCM wp_class_keyword;
 105 static SCM internal_keyword;
 106 \f
 107 /* Administrivia for breakpoint smobs.  */
 108
 109 /* The smob "free" function for <gdb:breakpoint>.  */
 110
 111 static size_t
 112 bpscm_free_breakpoint_smob (SCM self)
 113 {
 114   breakpoint_smob *bp_smob = (breakpoint_smob *) SCM_SMOB_DATA (self);
 115
 116   if (bp_smob->bp)
 117     bp_smob->bp->scm_bp_object = NULL;
 118
 119   /* Not necessary, done to catch bugs.  */
 120   bp_smob->bp = NULL;
 121   bp_smob->containing_scm = SCM_UNDEFINED;
 122   bp_smob->stop = SCM_UNDEFINED;
 123
 124   return 0;
 125 }
 126
 127 /* Return the name of TYPE.
 128    This doesn't handle all types, just the ones we export.  */
 129
 130 static const char *
 131 bpscm_type_to_string (enum bptype type)
 132 {
 133   switch (type)
 134     {
 135     case bp_none: return "BP_NONE";
 136     case bp_breakpoint: return "BP_BREAKPOINT";
 137     case bp_watchpoint: return "BP_WATCHPOINT";
 138     case bp_hardware_watchpoint: return "BP_HARDWARE_WATCHPOINT";
 139     case bp_read_watchpoint: return "BP_READ_WATCHPOINT";
 140     case bp_access_watchpoint: return "BP_ACCESS_WATCHPOINT";
 141     default: return "internal/other";
 142     }
 143 }
 144
 145 /* Return the name of ENABLE_STATE.  */
 146
 147 static const char *
 148 bpscm_enable_state_to_string (enum enable_state enable_state)
 149 {
 150   switch (enable_state)
 151     {
 152     case bp_disabled: return "disabled";
 153     case bp_enabled: return "enabled";
 154     case bp_call_disabled: return "call_disabled";
 155     default: return "unknown";
 156     }
 157 }
 158
 159 /* The smob "print" function for <gdb:breakpoint>.  */
 160
 161 static int
 162 bpscm_print_breakpoint_smob (SCM self, SCM port, scm_print_state *pstate)
 163 {
 164   breakpoint_smob *bp_smob = (breakpoint_smob *) SCM_SMOB_DATA (self);
 165   struct breakpoint *b = bp_smob->bp;
 166
 167   gdbscm_printf (port, "#<%s", breakpoint_smob_name);
 168
 169   /* Only print what we export to the user.
 170      The rest are possibly internal implementation details.  */
 171
 172   gdbscm_printf (port, " #%d", bp_smob->number);
 173
 174   /* Careful, the breakpoint may be invalid.  */
 175   if (b != NULL)
 176     {
 177       const char *str;
 178
 179       gdbscm_printf (port, " %s %s %s",
 180                      bpscm_type_to_string (b->type),
 181                      bpscm_enable_state_to_string (b->enable_state),
 182                      b->silent ? "silent" : "noisy");
 183
 184       gdbscm_printf (port, " hit:%d", b->hit_count);
 185       gdbscm_printf (port, " ignore:%d", b->ignore_count);
 186
 187       str = event_location_to_string (b->location.get ());
 188       if (str != NULL)
 189         gdbscm_printf (port, " @%s", str);
 190     }
 191
 192   scm_puts (">", port);
 193
 194   scm_remember_upto_here_1 (self);
 195
 196   /* Non-zero means success.  */
 197   return 1;
 198 }
 199
 200 /* Low level routine to create a <gdb:breakpoint> object.  */
 201
 202 static SCM
 203 bpscm_make_breakpoint_smob (void)
 204 {
 205   breakpoint_smob *bp_smob = (breakpoint_smob *)
 206     scm_gc_malloc (sizeof (breakpoint_smob), breakpoint_smob_name);
 207   SCM bp_scm;
 208
 209   memset (bp_smob, 0, sizeof (*bp_smob));
 210   bp_smob->number = -1;
 211   bp_smob->stop = SCM_BOOL_F;
 212   bp_scm = scm_new_smob (breakpoint_smob_tag, (scm_t_bits) bp_smob);
 213   bp_smob->containing_scm = bp_scm;
 214   gdbscm_init_gsmob (&bp_smob->base);
 215
 216   return bp_scm;
 217 }
 218
 219 /* Return non-zero if we want a Scheme wrapper for breakpoint B.
 220    If FROM_SCHEME is non-zero,this is called for a breakpoint created
 221    by the user from Scheme.  Otherwise it is zero.  */
 222
 223 static int
 224 bpscm_want_scm_wrapper_p (struct breakpoint *bp, int from_scheme)
 225 {
 226   /* Don't create <gdb:breakpoint> objects for internal GDB breakpoints.  */
 227   if (bp->number < 0 && !from_scheme)
 228     return 0;
 229
 230   /* The others are not supported.  */
 231   if (bp->type != bp_breakpoint
 232       && bp->type != bp_watchpoint
 233       && bp->type != bp_hardware_watchpoint
 234       && bp->type != bp_read_watchpoint
 235       && bp->type != bp_access_watchpoint)
 236     return 0;
 237
 238   return 1;
 239 }
 240
 241 /* Install the Scheme side of a breakpoint, CONTAINING_SCM, in
 242    the gdb side BP.  */
 243
 244 static void
 245 bpscm_attach_scm_to_breakpoint (struct breakpoint *bp, SCM containing_scm)
 246 {
 247   breakpoint_smob *bp_smob;
 248
 249   bp_smob = (breakpoint_smob *) SCM_SMOB_DATA (containing_scm);
 250   bp_smob->number = bp->number;
 251   bp_smob->bp = bp;
 252   bp_smob->containing_scm = containing_scm;
 253   bp_smob->bp->scm_bp_object = bp_smob;
 254
 255   /* The owner of this breakpoint is not in GC-controlled memory, so we need
 256      to protect it from GC until the breakpoint is deleted.  */
 257   scm_gc_protect_object (containing_scm);
 258 }
 259
 260 /* Return non-zero if SCM is a breakpoint smob.  */
 261
 262 static int
 263 bpscm_is_breakpoint (SCM scm)
 264 {
 265   return SCM_SMOB_PREDICATE (breakpoint_smob_tag, scm);
 266 }
 267
 268 /* (breakpoint? scm) -> boolean */
 269
 270 static SCM
 271 gdbscm_breakpoint_p (SCM scm)
 272 {
 273   return scm_from_bool (bpscm_is_breakpoint (scm));
 274 }
 275
 276 /* Returns the <gdb:breakpoint> object in SELF.
 277    Throws an exception if SELF is not a <gdb:breakpoint> object.  */
 278
 279 static SCM
 280 bpscm_get_breakpoint_arg_unsafe (SCM self, int arg_pos, const char *func_name)
 281 {
 282   SCM_ASSERT_TYPE (bpscm_is_breakpoint (self), self, arg_pos, func_name,
 283                    breakpoint_smob_name);
 284
 285   return self;
 286 }
 287
 288 /* Returns a pointer to the breakpoint smob of SELF.
 289    Throws an exception if SELF is not a <gdb:breakpoint> object.  */
 290
 291 static breakpoint_smob *
 292 bpscm_get_breakpoint_smob_arg_unsafe (SCM self, int arg_pos,
 293                                       const char *func_name)
 294 {
 295   SCM bp_scm = bpscm_get_breakpoint_arg_unsafe (self, arg_pos, func_name);
 296   breakpoint_smob *bp_smob = (breakpoint_smob *) SCM_SMOB_DATA (bp_scm);
 297
 298   return bp_smob;
 299 }
 300
 301 /* Return non-zero if breakpoint BP_SMOB is valid.  */
 302
 303 static int
 304 bpscm_is_valid (breakpoint_smob *bp_smob)
 305 {
 306   return bp_smob->bp != NULL;
 307 }
 308
 309 /* Returns the breakpoint smob in SELF, verifying it's valid.
 310    Throws an exception if SELF is not a <gdb:breakpoint> object,
 311    or is invalid.  */
 312
 313 static breakpoint_smob *
 314 bpscm_get_valid_breakpoint_smob_arg_unsafe (SCM self, int arg_pos,
 315                                             const char *func_name)
 316 {
 317   breakpoint_smob *bp_smob
 318     = bpscm_get_breakpoint_smob_arg_unsafe (self, arg_pos, func_name);
 319
 320   if (!bpscm_is_valid (bp_smob))
 321     {
 322       gdbscm_invalid_object_error (func_name, arg_pos, self,
 323                                    _("<gdb:breakpoint>"));
 324     }
 325
 326   return bp_smob;
 327 }
 328 \f
 329 /* Breakpoint methods.  */
 330
 331 /* (make-breakpoint string [#:type integer] [#:wp-class integer]
 332     [#:internal boolean) -> <gdb:breakpoint>
 333
 334    The result is the <gdb:breakpoint> Scheme object.
 335    The breakpoint is not available to be used yet, however.
 336    It must still be added to gdb with register-breakpoint!.  */
 337
 338 static SCM
 339 gdbscm_make_breakpoint (SCM location_scm, SCM rest)
 340 {
 341   const SCM keywords[] = {
 342     type_keyword, wp_class_keyword, internal_keyword, SCM_BOOL_F
 343   };
 344   char *s;
 345   char *location;
 346   int type_arg_pos = -1, access_type_arg_pos = -1, internal_arg_pos = -1;
 347   enum bptype type = bp_breakpoint;
 348   enum target_hw_bp_type access_type = hw_write;
 349   int internal = 0;
 350   SCM result;
 351   breakpoint_smob *bp_smob;
 352
 353   gdbscm_parse_function_args (FUNC_NAME, SCM_ARG1, keywords, "s#iit",
 354                               location_scm, &location, rest,
 355                               &type_arg_pos, &type,
 356                               &access_type_arg_pos, &access_type,
 357                               &internal_arg_pos, &internal);
 358
 359   result = bpscm_make_breakpoint_smob ();
 360   bp_smob = (breakpoint_smob *) SCM_SMOB_DATA (result);
 361
 362   s = location;
 363   location = gdbscm_gc_xstrdup (s);
 364   xfree (s);
 365
 366   switch (type)
 367     {
 368     case bp_breakpoint:
 369       if (access_type_arg_pos > 0)
 370         {
 371           gdbscm_misc_error (FUNC_NAME, access_type_arg_pos,
 372                              scm_from_int (access_type),
 373                              _("access type with breakpoint is not allowed"));
 374         }
 375       break;
 376     case bp_watchpoint:
 377       switch (access_type)
 378         {
 379         case hw_write:
 380         case hw_access:
 381         case hw_read:
 382           break;
 383         default:
 384           gdbscm_out_of_range_error (FUNC_NAME, access_type_arg_pos,
 385                                      scm_from_int (access_type),
 386                                      _("invalid watchpoint class"));
 387         }
 388       break;
 389     default:
 390       gdbscm_out_of_range_error (FUNC_NAME, access_type_arg_pos,
 391                                  scm_from_int (type),
 392                                  _("invalid breakpoint type"));
 393     }
 394
 395   bp_smob->is_scheme_bkpt = 1;
 396   bp_smob->spec.location = location;
 397   bp_smob->spec.type = type;
 398   bp_smob->spec.access_type = access_type;
 399   bp_smob->spec.is_internal = internal;
 400
 401   return result;
 402 }
 403
 404 /* (register-breakpoint! <gdb:breakpoint>) -> unspecified
 405
 406    It is an error to register a breakpoint created outside of Guile,
 407    or an already-registered breakpoint.  */
 408
 409 static SCM
 410 gdbscm_register_breakpoint_x (SCM self)
 411 {
 412   breakpoint_smob *bp_smob
 413     = bpscm_get_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
 414   struct gdb_exception except = exception_none;
 415   const char *location, *copy;
 416
 417   /* We only support registering breakpoints created with make-breakpoint.  */
 418   if (!bp_smob->is_scheme_bkpt)
 419     scm_misc_error (FUNC_NAME, _("not a Scheme breakpoint"), SCM_EOL);
 420
 421   if (bpscm_is_valid (bp_smob))
 422     scm_misc_error (FUNC_NAME, _("breakpoint is already registered"), SCM_EOL);
 423
 424   pending_breakpoint_scm = self;
 425   location = bp_smob->spec.location;
 426   copy = skip_spaces (location);
 427   event_location_up eloc
 428     = string_to_event_location_basic (&copy,
 429                                       current_language,
 430                                       symbol_name_match_type::WILD);
 431
 432   TRY
 433     {
 434       int internal = bp_smob->spec.is_internal;
 435
 436       switch (bp_smob->spec.type)
 437         {
 438         case bp_breakpoint:
 439           {
 440             create_breakpoint (get_current_arch (),
 441                                eloc.get (), NULL, -1, NULL,
 442                                0,
 443                                0, bp_breakpoint,
 444                                0,
 445                                AUTO_BOOLEAN_TRUE,
 446                                &bkpt_breakpoint_ops,
 447                                0, 1, internal, 0);
 448             break;
 449           }
 450         case bp_watchpoint:
 451           {
 452             enum target_hw_bp_type access_type = bp_smob->spec.access_type;
 453
 454             if (access_type == hw_write)
 455               watch_command_wrapper (location, 0, internal);
 456             else if (access_type == hw_access)
 457               awatch_command_wrapper (location, 0, internal);
 458             else if (access_type == hw_read)
 459               rwatch_command_wrapper (location, 0, internal);
 460             else
 461               gdb_assert_not_reached ("invalid access type");
 462             break;
 463           }
 464         default:
 465           gdb_assert_not_reached ("invalid breakpoint type");
 466         }
 467     }
 468   CATCH (ex, RETURN_MASK_ALL)
 469     {
 470       except = ex;
 471     }
 472   END_CATCH
 473
 474   /* Ensure this gets reset, even if there's an error.  */
 475   pending_breakpoint_scm = SCM_BOOL_F;
 476   GDBSCM_HANDLE_GDB_EXCEPTION (except);
 477
 478   return SCM_UNSPECIFIED;
 479 }
 480
 481 /* (delete-breakpoint! <gdb:breakpoint>) -> unspecified
 482    Scheme function which deletes (removes) the underlying GDB breakpoint
 483    from GDB's list of breakpoints.  This triggers the breakpoint_deleted
 484    observer which will call gdbscm_breakpoint_deleted; that function cleans
 485    up the Scheme bits.  */
 486
 487 static SCM
 488 gdbscm_delete_breakpoint_x (SCM self)
 489 {
 490   breakpoint_smob *bp_smob
 491     = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
 492
 493   TRY
 494     {
 495       delete_breakpoint (bp_smob->bp);
 496     }
 497   CATCH (except, RETURN_MASK_ALL)
 498     {
 499       GDBSCM_HANDLE_GDB_EXCEPTION (except);
 500     }
 501   END_CATCH
 502
 503   return SCM_UNSPECIFIED;
 504 }
 505
 506 /* iterate_over_breakpoints function for gdbscm_breakpoints.  */
 507
 508 static int
 509 bpscm_build_bp_list (struct breakpoint *bp, void *arg)
 510 {
 511   SCM *list = (SCM *) arg;
 512   breakpoint_smob *bp_smob = bp->scm_bp_object;
 513
 514   /* Lazily create wrappers for breakpoints created outside Scheme.  */
 515
 516   if (bp_smob == NULL)
 517     {
 518       if (bpscm_want_scm_wrapper_p (bp, 0))
 519         {
 520           SCM bp_scm;
 521
 522           bp_scm = bpscm_make_breakpoint_smob ();
 523           bpscm_attach_scm_to_breakpoint (bp, bp_scm);
 524           /* Refetch it.  */
 525           bp_smob = bp->scm_bp_object;
 526         }
 527     }
 528
 529   /* Not all breakpoints will have a companion Scheme object.
 530      Only breakpoints that trigger the created_breakpoint observer call,
 531      and satisfy certain conditions (see bpscm_want_scm_wrapper_p),
 532      get a companion object (this includes Scheme-created breakpoints).  */
 533
 534   if (bp_smob != NULL)
 535     *list = scm_cons (bp_smob->containing_scm, *list);
 536
 537   return 0;
 538 }
 539
 540 /* (breakpoints) -> list
 541    Return a list of all breakpoints.  */
 542
 543 static SCM
 544 gdbscm_breakpoints (void)
 545 {
 546   SCM list = SCM_EOL;
 547
 548   /* If iterate_over_breakpoints returns non-NULL it means the iteration
 549      terminated early.
 550      In that case abandon building the list and return #f.  */
 551   if (iterate_over_breakpoints (bpscm_build_bp_list, &list) != NULL)
 552     return SCM_BOOL_F;
 553
 554   return scm_reverse_x (list, SCM_EOL);
 555 }
 556
 557 /* (breakpoint-valid? <gdb:breakpoint>) -> boolean
 558    Returns #t if SELF is still valid.  */
 559
 560 static SCM
 561 gdbscm_breakpoint_valid_p (SCM self)
 562 {
 563   breakpoint_smob *bp_smob
 564     = bpscm_get_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
 565
 566   return scm_from_bool (bpscm_is_valid (bp_smob));
 567 }
 568
 569 /* (breakpoint-enabled? <gdb:breakpoint>) -> boolean */
 570
 571 static SCM
 572 gdbscm_breakpoint_enabled_p (SCM self)
 573 {
 574   breakpoint_smob *bp_smob
 575     = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
 576
 577   return scm_from_bool (bp_smob->bp->enable_state == bp_enabled);
 578 }
 579
 580 /* (set-breakpoint-enabled? <gdb:breakpoint> boolean) -> unspecified */
 581
 582 static SCM
 583 gdbscm_set_breakpoint_enabled_x (SCM self, SCM newvalue)
 584 {
 585   breakpoint_smob *bp_smob
 586     = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
 587
 588   SCM_ASSERT_TYPE (gdbscm_is_bool (newvalue), newvalue, SCM_ARG2, FUNC_NAME,
 589                    _("boolean"));
 590
 591   TRY
 592     {
 593       if (gdbscm_is_true (newvalue))
 594         enable_breakpoint (bp_smob->bp);
 595       else
 596         disable_breakpoint (bp_smob->bp);
 597     }
 598   CATCH (except, RETURN_MASK_ALL)
 599     {
 600       GDBSCM_HANDLE_GDB_EXCEPTION (except);
 601     }
 602   END_CATCH
 603
 604   return SCM_UNSPECIFIED;
 605 }
 606
 607 /* (breakpoint-silent? <gdb:breakpoint>) -> boolean */
 608
 609 static SCM
 610 gdbscm_breakpoint_silent_p (SCM self)
 611 {
 612   breakpoint_smob *bp_smob
 613     = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
 614
 615   return scm_from_bool (bp_smob->bp->silent);
 616 }
 617
 618 /* (set-breakpoint-silent?! <gdb:breakpoint> boolean) -> unspecified */
 619
 620 static SCM
 621 gdbscm_set_breakpoint_silent_x (SCM self, SCM newvalue)
 622 {
 623   breakpoint_smob *bp_smob
 624     = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
 625
 626   SCM_ASSERT_TYPE (gdbscm_is_bool (newvalue), newvalue, SCM_ARG2, FUNC_NAME,
 627                    _("boolean"));
 628
 629   TRY
 630     {
 631       breakpoint_set_silent (bp_smob->bp, gdbscm_is_true (newvalue));
 632     }
 633   CATCH (except, RETURN_MASK_ALL)
 634     {
 635       GDBSCM_HANDLE_GDB_EXCEPTION (except);
 636     }
 637   END_CATCH
 638
 639   return SCM_UNSPECIFIED;
 640 }
 641
 642 /* (breakpoint-ignore-count <gdb:breakpoint>) -> integer */
 643
 644 static SCM
 645 gdbscm_breakpoint_ignore_count (SCM self)
 646 {
 647   breakpoint_smob *bp_smob
 648     = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
 649
 650   return scm_from_long (bp_smob->bp->ignore_count);
 651 }
 652
 653 /* (set-breakpoint-ignore-count! <gdb:breakpoint> integer)
 654      -> unspecified */
 655
 656 static SCM
 657 gdbscm_set_breakpoint_ignore_count_x (SCM self, SCM newvalue)
 658 {
 659   breakpoint_smob *bp_smob
 660     = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
 661   long value;
 662
 663   SCM_ASSERT_TYPE (scm_is_signed_integer (newvalue, LONG_MIN, LONG_MAX),
 664                    newvalue, SCM_ARG2, FUNC_NAME, _("integer"));
 665
 666   value = scm_to_long (newvalue);
 667   if (value < 0)
 668     value = 0;
 669
 670   TRY
 671     {
 672       set_ignore_count (bp_smob->number, (int) value, 0);
 673     }
 674   CATCH (except, RETURN_MASK_ALL)
 675     {
 676       GDBSCM_HANDLE_GDB_EXCEPTION (except);
 677     }
 678   END_CATCH
 679
 680   return SCM_UNSPECIFIED;
 681 }
 682
 683 /* (breakpoint-hit-count <gdb:breakpoint>) -> integer */
 684
 685 static SCM
 686 gdbscm_breakpoint_hit_count (SCM self)
 687 {
 688   breakpoint_smob *bp_smob
 689     = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
 690
 691   return scm_from_long (bp_smob->bp->hit_count);
 692 }
 693
 694 /* (set-breakpoint-hit-count! <gdb:breakpoint> integer) -> unspecified */
 695
 696 static SCM
 697 gdbscm_set_breakpoint_hit_count_x (SCM self, SCM newvalue)
 698 {
 699   breakpoint_smob *bp_smob
 700     = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
 701   long value;
 702
 703   SCM_ASSERT_TYPE (scm_is_signed_integer (newvalue, LONG_MIN, LONG_MAX),
 704                    newvalue, SCM_ARG2, FUNC_NAME, _("integer"));
 705
 706   value = scm_to_long (newvalue);
 707   if (value < 0)
 708     value = 0;
 709
 710   if (value != 0)
 711     {
 712       gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG2, newvalue,
 713                                  _("hit-count must be zero"));
 714     }
 715
 716   bp_smob->bp->hit_count = 0;
 717
 718   return SCM_UNSPECIFIED;
 719 }
 720
 721 /* (breakpoint-thread <gdb:breakpoint>) -> integer */
 722
 723 static SCM
 724 gdbscm_breakpoint_thread (SCM self)
 725 {
 726   breakpoint_smob *bp_smob
 727     = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
 728
 729   if (bp_smob->bp->thread == -1)
 730     return SCM_BOOL_F;
 731
 732   return scm_from_long (bp_smob->bp->thread);
 733 }
 734
 735 /* (set-breakpoint-thread! <gdb:breakpoint> integer) -> unspecified */
 736
 737 static SCM
 738 gdbscm_set_breakpoint_thread_x (SCM self, SCM newvalue)
 739 {
 740   breakpoint_smob *bp_smob
 741     = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
 742   long id;
 743
 744   if (scm_is_signed_integer (newvalue, LONG_MIN, LONG_MAX))
 745     {
 746       id = scm_to_long (newvalue);
 747       if (!valid_global_thread_id (id))
 748         {
 749           gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG2, newvalue,
 750                                      _("invalid thread id"));
 751         }
 752     }
 753   else if (gdbscm_is_false (newvalue))
 754     id = -1;
 755   else
 756     SCM_ASSERT_TYPE (0, newvalue, SCM_ARG2, FUNC_NAME, _("integer or #f"));
 757
 758   breakpoint_set_thread (bp_smob->bp, id);
 759
 760   return SCM_UNSPECIFIED;
 761 }
 762
 763 /* (breakpoint-task <gdb:breakpoint>) -> integer */
 764
 765 static SCM
 766 gdbscm_breakpoint_task (SCM self)
 767 {
 768   breakpoint_smob *bp_smob
 769     = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
 770
 771   if (bp_smob->bp->task == 0)
 772     return SCM_BOOL_F;
 773
 774   return scm_from_long (bp_smob->bp->task);
 775 }
 776
 777 /* (set-breakpoint-task! <gdb:breakpoint> integer) -> unspecified */
 778
 779 static SCM
 780 gdbscm_set_breakpoint_task_x (SCM self, SCM newvalue)
 781 {
 782   breakpoint_smob *bp_smob
 783     = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
 784   long id;
 785   int valid_id = 0;
 786
 787   if (scm_is_signed_integer (newvalue, LONG_MIN, LONG_MAX))
 788     {
 789       id = scm_to_long (newvalue);
 790
 791       TRY
 792         {
 793           valid_id = valid_task_id (id);
 794         }
 795       CATCH (except, RETURN_MASK_ALL)
 796         {
 797           GDBSCM_HANDLE_GDB_EXCEPTION (except);
 798         }
 799       END_CATCH
 800
 801       if (! valid_id)
 802         {
 803           gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG2, newvalue,
 804                                      _("invalid task id"));
 805         }
 806     }
 807   else if (gdbscm_is_false (newvalue))
 808     id = 0;
 809   else
 810     SCM_ASSERT_TYPE (0, newvalue, SCM_ARG2, FUNC_NAME, _("integer or #f"));
 811
 812   TRY
 813     {
 814       breakpoint_set_task (bp_smob->bp, id);
 815     }
 816   CATCH (except, RETURN_MASK_ALL)
 817     {
 818       GDBSCM_HANDLE_GDB_EXCEPTION (except);
 819     }
 820   END_CATCH
 821
 822   return SCM_UNSPECIFIED;
 823 }
 824
 825 /* (breakpoint-location <gdb:breakpoint>) -> string */
 826
 827 static SCM
 828 gdbscm_breakpoint_location (SCM self)
 829 {
 830   breakpoint_smob *bp_smob
 831     = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
 832   const char *str;
 833
 834   if (bp_smob->bp->type != bp_breakpoint)
 835     return SCM_BOOL_F;
 836
 837   str = event_location_to_string (bp_smob->bp->location.get ());
 838   if (! str)
 839     str = "";
 840
 841   return gdbscm_scm_from_c_string (str);
 842 }
 843
 844 /* (breakpoint-expression <gdb:breakpoint>) -> string
 845    This is only valid for watchpoints.
 846    Returns #f for non-watchpoints.  */
 847
 848 static SCM
 849 gdbscm_breakpoint_expression (SCM self)
 850 {
 851   breakpoint_smob *bp_smob
 852     = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
 853   struct watchpoint *wp;
 854
 855   if (!is_watchpoint (bp_smob->bp))
 856     return SCM_BOOL_F;
 857
 858   wp = (struct watchpoint *) bp_smob->bp;
 859
 860   const char *str = wp->exp_string;
 861   if (! str)
 862     str = "";
 863
 864   return gdbscm_scm_from_c_string (str);
 865 }
 866
 867 /* (breakpoint-condition <gdb:breakpoint>) -> string */
 868
 869 static SCM
 870 gdbscm_breakpoint_condition (SCM self)
 871 {
 872   breakpoint_smob *bp_smob
 873     = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
 874   char *str;
 875
 876   str = bp_smob->bp->cond_string;
 877   if (! str)
 878     return SCM_BOOL_F;
 879
 880   return gdbscm_scm_from_c_string (str);
 881 }
 882
 883 /* (set-breakpoint-condition! <gdb:breakpoint> string|#f)
 884    -> unspecified */
 885
 886 static SCM
 887 gdbscm_set_breakpoint_condition_x (SCM self, SCM newvalue)
 888 {
 889   breakpoint_smob *bp_smob
 890     = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
 891   char *exp;
 892   struct gdb_exception except = exception_none;
 893
 894   SCM_ASSERT_TYPE (scm_is_string (newvalue) || gdbscm_is_false (newvalue),
 895                    newvalue, SCM_ARG2, FUNC_NAME,
 896                    _("string or #f"));
 897
 898   if (gdbscm_is_false (newvalue))
 899     exp = NULL;
 900   else
 901     exp = gdbscm_scm_to_c_string (newvalue);
 902
 903   TRY
 904     {
 905       set_breakpoint_condition (bp_smob->bp, exp ? exp : "", 0);
 906     }
 907   CATCH (ex, RETURN_MASK_ALL)
 908     {
 909       except = ex;
 910     }
 911   END_CATCH
 912
 913   xfree (exp);
 914   GDBSCM_HANDLE_GDB_EXCEPTION (except);
 915
 916   return SCM_UNSPECIFIED;
 917 }
 918
 919 /* (breakpoint-stop <gdb:breakpoint>) -> procedure or #f */
 920
 921 static SCM
 922 gdbscm_breakpoint_stop (SCM self)
 923 {
 924   breakpoint_smob *bp_smob
 925     = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
 926
 927   return bp_smob->stop;
 928 }
 929
 930 /* (set-breakpoint-stop! <gdb:breakpoint> procedure|#f)
 931    -> unspecified */
 932
 933 static SCM
 934 gdbscm_set_breakpoint_stop_x (SCM self, SCM newvalue)
 935 {
 936   breakpoint_smob *bp_smob
 937     = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
 938   const struct extension_language_defn *extlang = NULL;
 939
 940   SCM_ASSERT_TYPE (gdbscm_is_procedure (newvalue)
 941                    || gdbscm_is_false (newvalue),
 942                    newvalue, SCM_ARG2, FUNC_NAME,
 943                    _("procedure or #f"));
 944
 945   if (bp_smob->bp->cond_string != NULL)
 946     extlang = get_ext_lang_defn (EXT_LANG_GDB);
 947   if (extlang == NULL)
 948     extlang = get_breakpoint_cond_ext_lang (bp_smob->bp, EXT_LANG_GUILE);
 949   if (extlang != NULL)
 950     {
 951       char *error_text
 952         = xstrprintf (_("Only one stop condition allowed.  There is"
 953                         " currently a %s stop condition defined for"
 954                         " this breakpoint."),
 955                       ext_lang_capitalized_name (extlang));
 956
 957       scm_dynwind_begin ((scm_t_dynwind_flags) 0);
 958       gdbscm_dynwind_xfree (error_text);
 959       gdbscm_out_of_range_error (FUNC_NAME, SCM_ARG1, self, error_text);
 960       /* The following line, while unnecessary, is present for completeness
 961          sake.  */
 962       scm_dynwind_end ();
 963     }
 964
 965   bp_smob->stop = newvalue;
 966
 967   return SCM_UNSPECIFIED;
 968 }
 969
 970 /* (breakpoint-commands <gdb:breakpoint>) -> string */
 971
 972 static SCM
 973 gdbscm_breakpoint_commands (SCM self)
 974 {
 975   breakpoint_smob *bp_smob
 976     = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
 977   struct breakpoint *bp;
 978   long length;
 979   SCM result;
 980
 981   bp = bp_smob->bp;
 982
 983   if (bp->commands == NULL)
 984     return SCM_BOOL_F;
 985
 986   string_file buf;
 987
 988   current_uiout->redirect (&buf);
 989   TRY
 990     {
 991       print_command_lines (current_uiout, breakpoint_commands (bp), 0);
 992     }
 993   CATCH (except, RETURN_MASK_ALL)
 994     {
 995       current_uiout->redirect (NULL);
 996       gdbscm_throw_gdb_exception (except);
 997     }
 998   END_CATCH
 999
1000   current_uiout->redirect (NULL);
1001   result = gdbscm_scm_from_c_string (buf.c_str ());
1002
1003   return result;
1004 }
1005
1006 /* (breakpoint-type <gdb:breakpoint>) -> integer */
1007
1008 static SCM
1009 gdbscm_breakpoint_type (SCM self)
1010 {
1011   breakpoint_smob *bp_smob
1012     = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
1013
1014   return scm_from_long (bp_smob->bp->type);
1015 }
1016
1017 /* (breakpoint-visible? <gdb:breakpoint>) -> boolean */
1018
1019 static SCM
1020 gdbscm_breakpoint_visible (SCM self)
1021 {
1022   breakpoint_smob *bp_smob
1023     = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
1024
1025   return scm_from_bool (bp_smob->bp->number >= 0);
1026 }
1027
1028 /* (breakpoint-number <gdb:breakpoint>) -> integer */
1029
1030 static SCM
1031 gdbscm_breakpoint_number (SCM self)
1032 {
1033   breakpoint_smob *bp_smob
1034     = bpscm_get_valid_breakpoint_smob_arg_unsafe (self, SCM_ARG1, FUNC_NAME);
1035
1036   return scm_from_long (bp_smob->number);
1037 }
1038 \f
1039 /* Return TRUE if "stop" has been set for this breakpoint.
1040
1041    This is the extension_language_ops.breakpoint_has_cond "method".  */
1042
1043 int
1044 gdbscm_breakpoint_has_cond (const struct extension_language_defn *extlang,
1045                             struct breakpoint *b)
1046 {
1047   breakpoint_smob *bp_smob = b->scm_bp_object;
1048
1049   if (bp_smob == NULL)
1050     return 0;
1051
1052   return gdbscm_is_procedure (bp_smob->stop);
1053 }
1054
1055 /* Call the "stop" method in the breakpoint class.
1056    This must only be called if gdbscm_breakpoint_has_cond returns true.
1057    If the stop method returns #t, the inferior will be stopped at the
1058    breakpoint.  Otherwise the inferior will be allowed to continue
1059    (assuming other conditions don't indicate "stop").
1060
1061    This is the extension_language_ops.breakpoint_cond_says_stop "method".  */
1062
1063 enum ext_lang_bp_stop
1064 gdbscm_breakpoint_cond_says_stop
1065   (const struct extension_language_defn *extlang, struct breakpoint *b)
1066 {
1067   breakpoint_smob *bp_smob = b->scm_bp_object;
1068   SCM predicate_result;
1069   int stop;
1070
1071   if (bp_smob == NULL)
1072     return EXT_LANG_BP_STOP_UNSET;
1073   if (!gdbscm_is_procedure (bp_smob->stop))
1074     return EXT_LANG_BP_STOP_UNSET;
1075
1076   stop = 1;
1077
1078   predicate_result
1079     = gdbscm_safe_call_1 (bp_smob->stop, bp_smob->containing_scm, NULL);
1080
1081   if (gdbscm_is_exception (predicate_result))
1082     ; /* Exception already printed.  */
1083   /* If the "stop" function returns #f that means
1084      the Scheme breakpoint wants GDB to continue.  */
1085   else if (gdbscm_is_false (predicate_result))
1086     stop = 0;
1087
1088   return stop ? EXT_LANG_BP_STOP_YES : EXT_LANG_BP_STOP_NO;
1089 }
1090 \f
1091 /* Event callback functions.  */
1092
1093 /* Callback that is used when a breakpoint is created.
1094    For breakpoints created by Scheme, i.e., gdbscm_create_breakpoint_x, finish
1095    object creation by connecting the Scheme wrapper to the gdb object.
1096    We ignore breakpoints created from gdb or python here, we create the
1097    Scheme wrapper for those when there's a need to, e.g.,
1098    gdbscm_breakpoints.  */
1099
1100 static void
1101 bpscm_breakpoint_created (struct breakpoint *bp)
1102 {
1103   SCM bp_scm;
1104
1105   if (gdbscm_is_false (pending_breakpoint_scm))
1106     return;
1107
1108   /* Verify our caller error checked the user's request.  */
1109   gdb_assert (bpscm_want_scm_wrapper_p (bp, 1));
1110
1111   bp_scm = pending_breakpoint_scm;
1112   pending_breakpoint_scm = SCM_BOOL_F;
1113
1114   bpscm_attach_scm_to_breakpoint (bp, bp_scm);
1115 }
1116
1117 /* Callback that is used when a breakpoint is deleted.  This will
1118    invalidate the corresponding Scheme object.  */
1119
1120 static void
1121 bpscm_breakpoint_deleted (struct breakpoint *b)
1122 {
1123   int num = b->number;
1124   struct breakpoint *bp;
1125
1126   /* TODO: Why the lookup?  We have B.  */
1127
1128   bp = get_breakpoint (num);
1129   if (bp)
1130     {
1131       breakpoint_smob *bp_smob = bp->scm_bp_object;
1132
1133       if (bp_smob)
1134         {
1135           bp_smob->bp = NULL;
1136           bp_smob->number = -1;
1137           bp_smob->stop = SCM_BOOL_F;
1138           scm_gc_unprotect_object (bp_smob->containing_scm);
1139         }
1140     }
1141 }
1142 \f
1143 /* Initialize the Scheme breakpoint code.  */
1144
1145 static const scheme_integer_constant breakpoint_integer_constants[] =
1146 {
1147   { "BP_NONE", bp_none },
1148   { "BP_BREAKPOINT", bp_breakpoint },
1149   { "BP_WATCHPOINT", bp_watchpoint },
1150   { "BP_HARDWARE_WATCHPOINT", bp_hardware_watchpoint },
1151   { "BP_READ_WATCHPOINT", bp_read_watchpoint },
1152   { "BP_ACCESS_WATCHPOINT", bp_access_watchpoint },
1153
1154   { "WP_READ", hw_read },
1155   { "WP_WRITE", hw_write },
1156   { "WP_ACCESS", hw_access },
1157
1158   END_INTEGER_CONSTANTS
1159 };
1160
1161 static const scheme_function breakpoint_functions[] =
1162 {
1163   { "make-breakpoint", 1, 0, 1, as_a_scm_t_subr (gdbscm_make_breakpoint),
1164     "\
1165 Create a GDB breakpoint object.\n\
1166 \n\
1167   Arguments:\n\
1168     location [#:type <type>] [#:wp-class <wp-class>] [#:internal <bool>]\n\
1169   Returns:\n\
1170     <gdb:breakpoint object" },
1171
1172   { "register-breakpoint!", 1, 0, 0,
1173     as_a_scm_t_subr (gdbscm_register_breakpoint_x),
1174     "\
1175 Register a <gdb:breakpoint> object with GDB." },
1176
1177   { "delete-breakpoint!", 1, 0, 0, as_a_scm_t_subr (gdbscm_delete_breakpoint_x),
1178     "\
1179 Delete the breakpoint from GDB." },
1180
1181   { "breakpoints", 0, 0, 0, as_a_scm_t_subr (gdbscm_breakpoints),
1182     "\
1183 Return a list of all GDB breakpoints.\n\
1184 \n\
1185   Arguments: none" },
1186
1187   { "breakpoint?", 1, 0, 0, as_a_scm_t_subr (gdbscm_breakpoint_p),
1188     "\
1189 Return #t if the object is a <gdb:breakpoint> object." },
1190
1191   { "breakpoint-valid?", 1, 0, 0, as_a_scm_t_subr (gdbscm_breakpoint_valid_p),
1192     "\
1193 Return #t if the breakpoint has not been deleted from GDB." },
1194
1195   { "breakpoint-number", 1, 0, 0, as_a_scm_t_subr (gdbscm_breakpoint_number),
1196     "\
1197 Return the breakpoint's number." },
1198
1199   { "breakpoint-type", 1, 0, 0, as_a_scm_t_subr (gdbscm_breakpoint_type),
1200     "\
1201 Return the type of the breakpoint." },
1202
1203   { "breakpoint-visible?", 1, 0, 0, as_a_scm_t_subr (gdbscm_breakpoint_visible),
1204     "\
1205 Return #t if the breakpoint is visible to the user." },
1206
1207   { "breakpoint-location", 1, 0, 0,
1208     as_a_scm_t_subr (gdbscm_breakpoint_location),
1209     "\
1210 Return the location of the breakpoint as specified by the user." },
1211
1212   { "breakpoint-expression", 1, 0, 0,
1213     as_a_scm_t_subr (gdbscm_breakpoint_expression),
1214     "\
1215 Return the expression of the breakpoint as specified by the user.\n\
1216 Valid for watchpoints only, returns #f for non-watchpoints." },
1217
1218   { "breakpoint-enabled?", 1, 0, 0,
1219     as_a_scm_t_subr (gdbscm_breakpoint_enabled_p),
1220     "\
1221 Return #t if the breakpoint is enabled." },
1222
1223   { "set-breakpoint-enabled!", 2, 0, 0,
1224     as_a_scm_t_subr (gdbscm_set_breakpoint_enabled_x),
1225     "\
1226 Set the breakpoint's enabled state.\n\
1227 \n\
1228   Arguments: <gdb:breakpoint> boolean" },
1229
1230   { "breakpoint-silent?", 1, 0, 0, as_a_scm_t_subr (gdbscm_breakpoint_silent_p),
1231     "\
1232 Return #t if the breakpoint is silent." },
1233
1234   { "set-breakpoint-silent!", 2, 0, 0,
1235     as_a_scm_t_subr (gdbscm_set_breakpoint_silent_x),
1236     "\
1237 Set the breakpoint's silent state.\n\
1238 \n\
1239   Arguments: <gdb:breakpoint> boolean" },
1240
1241   { "breakpoint-ignore-count", 1, 0, 0,
1242     as_a_scm_t_subr (gdbscm_breakpoint_ignore_count),
1243     "\
1244 Return the breakpoint's \"ignore\" count." },
1245
1246   { "set-breakpoint-ignore-count!", 2, 0, 0,
1247     as_a_scm_t_subr (gdbscm_set_breakpoint_ignore_count_x),
1248     "\
1249 Set the breakpoint's \"ignore\" count.\n\
1250 \n\
1251   Arguments: <gdb:breakpoint> count" },
1252
1253   { "breakpoint-hit-count", 1, 0, 0,
1254     as_a_scm_t_subr (gdbscm_breakpoint_hit_count),
1255     "\
1256 Return the breakpoint's \"hit\" count." },
1257
1258   { "set-breakpoint-hit-count!", 2, 0, 0,
1259     as_a_scm_t_subr (gdbscm_set_breakpoint_hit_count_x),
1260     "\
1261 Set the breakpoint's \"hit\" count.  The value must be zero.\n\
1262 \n\
1263   Arguments: <gdb:breakpoint> 0" },
1264
1265   { "breakpoint-thread", 1, 0, 0, as_a_scm_t_subr (gdbscm_breakpoint_thread),
1266     "\
1267 Return the breakpoint's global thread id or #f if there isn't one." },
1268
1269   { "set-breakpoint-thread!", 2, 0, 0,
1270     as_a_scm_t_subr (gdbscm_set_breakpoint_thread_x),
1271     "\
1272 Set the global thread id for this breakpoint.\n\
1273 \n\
1274   Arguments: <gdb:breakpoint> global-thread-id" },
1275
1276   { "breakpoint-task", 1, 0, 0, as_a_scm_t_subr (gdbscm_breakpoint_task),
1277     "\
1278 Return the breakpoint's Ada task-id or #f if there isn't one." },
1279
1280   { "set-breakpoint-task!", 2, 0, 0,
1281     as_a_scm_t_subr (gdbscm_set_breakpoint_task_x),
1282     "\
1283 Set the breakpoint's Ada task-id.\n\
1284 \n\
1285   Arguments: <gdb:breakpoint> task-id" },
1286
1287   { "breakpoint-condition", 1, 0, 0,
1288     as_a_scm_t_subr (gdbscm_breakpoint_condition),
1289     "\
1290 Return the breakpoint's condition as specified by the user.\n\
1291 Return #f if there isn't one." },
1292
1293   { "set-breakpoint-condition!", 2, 0, 0,
1294     as_a_scm_t_subr (gdbscm_set_breakpoint_condition_x),
1295     "\
1296 Set the breakpoint's condition.\n\
1297 \n\
1298   Arguments: <gdb:breakpoint> condition\n\
1299     condition: a string" },
1300
1301   { "breakpoint-stop", 1, 0, 0, as_a_scm_t_subr (gdbscm_breakpoint_stop),
1302     "\
1303 Return the breakpoint's stop predicate.\n\
1304 Return #f if there isn't one." },
1305
1306   { "set-breakpoint-stop!", 2, 0, 0,
1307     as_a_scm_t_subr (gdbscm_set_breakpoint_stop_x),
1308     "\
1309 Set the breakpoint's stop predicate.\n\
1310 \n\
1311   Arguments: <gdb:breakpoint> procedure\n\
1312     procedure: A procedure of one argument, the breakpoint.\n\
1313       Its result is true if program execution should stop." },
1314
1315   { "breakpoint-commands", 1, 0, 0,
1316     as_a_scm_t_subr (gdbscm_breakpoint_commands),
1317     "\
1318 Return the breakpoint's commands." },
1319
1320   END_FUNCTIONS
1321 };
1322
1323 void
1324 gdbscm_initialize_breakpoints (void)
1325 {
1326   breakpoint_smob_tag
1327     = gdbscm_make_smob_type (breakpoint_smob_name, sizeof (breakpoint_smob));
1328   scm_set_smob_free (breakpoint_smob_tag, bpscm_free_breakpoint_smob);
1329   scm_set_smob_print (breakpoint_smob_tag, bpscm_print_breakpoint_smob);
1330
1331   observer_attach_breakpoint_created (bpscm_breakpoint_created);
1332   observer_attach_breakpoint_deleted (bpscm_breakpoint_deleted);
1333
1334   gdbscm_define_integer_constants (breakpoint_integer_constants, 1);
1335   gdbscm_define_functions (breakpoint_functions, 1);
1336
1337   type_keyword = scm_from_latin1_keyword ("type");
1338   wp_class_keyword = scm_from_latin1_keyword ("wp-class");
1339   internal_keyword = scm_from_latin1_keyword ("internal");
1340 }