git.oblomov.eu Git - wine/blob - programs/winedbg/break.c

   1 /*
   2  * Debugger break-points handling
   3  *
   4  * Copyright 1994 Martin von Loewis
   5  * Copyright 1995 Alexandre Julliard
   6  * Copyright 1999,2000 Eric Pouech
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 #include "config.h"
  24 #include "debugger.h"
  25 #include "wine/debug.h"
  26
  27 WINE_DEFAULT_DEBUG_CHANNEL(winedbg);
  28
  29 /***********************************************************************
  30  *           break_set_xpoints
  31  *
  32  * Set or remove all the breakpoints & watchpoints
  33  */
  34 void  break_set_xpoints(BOOL set)
  35 {
  36     static BOOL                 last; /* = 0 = FALSE */
  37
  38     unsigned int                i, ret, size;
  39     void*                       addr;
  40     struct dbg_breakpoint*      bp = dbg_curr_process->bp;
  41
  42     if (set == last) return;
  43     last = set;
  44
  45     for (i = 0; i < dbg_curr_process->next_bp; i++)
  46     {
  47         if (!bp[i].refcount || !bp[i].enabled) continue;
  48
  49         if (bp[i].xpoint_type == be_xpoint_break)
  50             size = 0;
  51         else
  52             size = bp[i].w.len + 1;
  53         addr = (void*)memory_to_linear_addr(&bp[i].addr);
  54
  55         if (set)
  56             ret = be_cpu->insert_Xpoint(dbg_curr_process->handle,
  57                                         dbg_curr_process->process_io,
  58                                         &dbg_context, bp[i].xpoint_type, addr,
  59                                         &bp[i].info, size);
  60         else
  61             ret = be_cpu->remove_Xpoint(dbg_curr_process->handle,
  62                                         dbg_curr_process->process_io,
  63                                         &dbg_context, bp[i].xpoint_type, addr,
  64                                         bp[i].info, size);
  65         if (!ret)
  66         {
  67             dbg_printf("Invalid address (");
  68             print_address(&bp[i].addr, FALSE);
  69             dbg_printf(") for breakpoint %d, disabling it\n", i);
  70             bp[i].enabled = FALSE;
  71         }
  72     }
  73 }
  74
  75 /***********************************************************************
  76  *           find_xpoint
  77  *
  78  * Find the breakpoint for a given address. Return the breakpoint
  79  * number or -1 if none.
  80  */
  81 static int find_xpoint(const ADDRESS* addr, enum be_xpoint_type type)
  82 {
  83     int                         i;
  84     void*                       lin = memory_to_linear_addr(addr);
  85     struct dbg_breakpoint*      bp = dbg_curr_process->bp;
  86
  87     for (i = 0; i < dbg_curr_process->next_bp; i++)
  88     {
  89         if (bp[i].refcount && bp[i].enabled && bp[i].xpoint_type == type &&
  90             memory_to_linear_addr(&bp[i].addr) == lin)
  91             return i;
  92     }
  93     return -1;
  94 }
  95
  96 /***********************************************************************
  97  *           init_xpoint
  98  *
  99  * Find an empty slot in BP table to add a new break/watch point
 100  */
 101 static  int init_xpoint(int type, const ADDRESS* addr)
 102 {
 103     int                         num;
 104     struct dbg_breakpoint*      bp = dbg_curr_process->bp;
 105
 106     for (num = (dbg_curr_process->next_bp < MAX_BREAKPOINTS) ?
 107              dbg_curr_process->next_bp++ : 1;
 108          num < MAX_BREAKPOINTS; num++)
 109     {
 110         if (bp[num].refcount == 0)
 111         {
 112             bp[num].refcount    = 1;
 113             bp[num].enabled     = TRUE;
 114             bp[num].xpoint_type = type;
 115             bp[num].skipcount   = 0;
 116             bp[num].addr        = *addr;
 117             return num;
 118         }
 119     }
 120
 121     dbg_printf("Too many bp. Please delete some.\n");
 122     return -1;
 123 }
 124
 125 /***********************************************************************
 126  *           get_watched_value
 127  *
 128  * Returns the value watched by watch point 'num'.
 129  */
 130 static  BOOL    get_watched_value(int num, LPDWORD val)
 131 {
 132     BYTE        buf[4];
 133
 134     if (!dbg_read_memory(memory_to_linear_addr(&dbg_curr_process->bp[num].addr),
 135                          buf, dbg_curr_process->bp[num].w.len + 1))
 136         return FALSE;
 137
 138     switch (dbg_curr_process->bp[num].w.len + 1)
 139     {
 140     case 4:     *val = *(DWORD*)buf;    break;
 141     case 2:     *val = *(WORD*)buf;     break;
 142     case 1:     *val = *(BYTE*)buf;     break;
 143     default: RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);
 144     }
 145     return TRUE;
 146 }
 147
 148 /***********************************************************************
 149  *           break_add_break
 150  *
 151  * Add a breakpoint.
 152  */
 153 BOOL break_add_break(const ADDRESS* addr, BOOL verbose)
 154 {
 155     int                         num;
 156     BYTE                        ch;
 157     struct dbg_breakpoint*      bp = dbg_curr_process->bp;
 158
 159     if ((num = find_xpoint(addr, be_xpoint_break)) >= 1)
 160     {
 161         bp[num].refcount++;
 162         dbg_printf("Breakpoint %d at ", num);
 163         print_address(&bp[num].addr, TRUE);
 164         dbg_printf(" (refcount=%d)\n", bp[num].refcount);
 165         return TRUE;
 166     }
 167
 168     if (!dbg_read_memory(memory_to_linear_addr(addr), &ch, sizeof(ch)))
 169     {
 170         if (verbose)
 171         {
 172             dbg_printf("Invalid address ");
 173             print_bare_address(addr);
 174             dbg_printf(", can't set breakpoint\n");
 175         }
 176         return FALSE;
 177     }
 178
 179     if ((num = init_xpoint(be_xpoint_break, addr)) == -1)
 180         return FALSE;
 181
 182     dbg_printf("Breakpoint %d at ", num);
 183     print_address(&bp[num].addr, TRUE);
 184     dbg_printf("\n");
 185
 186     return TRUE;
 187 }
 188
 189 /***********************************************************************
 190  *           break_add_break_from_lvalue
 191  *
 192  * Add a breakpoint.
 193  */
 194 BOOL break_add_break_from_lvalue(const struct dbg_lvalue* lvalue)
 195 {
 196     ADDRESS     addr;
 197
 198     addr.Mode = AddrModeFlat;
 199     addr.Offset = types_extract_as_integer(lvalue);
 200
 201     if (!break_add_break(&addr, TRUE))
 202     {
 203         if (!DBG_IVAR(CanDeferOnBPByAddr))
 204         {
 205             dbg_printf("Invalid address, can't set breakpoint\n"
 206                        "You can turn on deferring bp by address by setting $CanDeferOnBPByAddr to 1\n");
 207             return FALSE;
 208         }
 209         dbg_printf("Unable to add breakpoint, will check again any time a new DLL is loaded\n");
 210         dbg_curr_process->delayed_bp =
 211             dbg_heap_realloc(dbg_curr_process->delayed_bp,
 212                              sizeof(struct dbg_delayed_bp) * ++dbg_curr_process->num_delayed_bp);
 213
 214         dbg_curr_process->delayed_bp[dbg_curr_process->num_delayed_bp - 1].is_symbol = FALSE;
 215         dbg_curr_process->delayed_bp[dbg_curr_process->num_delayed_bp - 1].u.addr    = addr;
 216         return TRUE;
 217     }
 218     return FALSE;
 219 }
 220
 221 /***********************************************************************
 222  *           break_add_break_from_id
 223  *
 224  * Add a breakpoint from a function name (and eventually a line #)
 225  */
 226 void    break_add_break_from_id(const char *name, int lineno)
 227 {
 228     struct dbg_lvalue   lvalue;
 229     int                 i;
 230
 231     switch (symbol_get_lvalue(name, lineno, &lvalue, TRUE))
 232     {
 233     case sglv_found:
 234         break_add_break(&lvalue.addr, TRUE);
 235         return;
 236     case sglv_unknown:
 237         break;
 238     case sglv_aborted: /* user aborted symbol lookup */
 239         return;
 240     }
 241
 242     dbg_printf("Unable to add breakpoint, will check again when a new DLL is loaded\n");
 243     for (i = 0; i < dbg_curr_process->num_delayed_bp; i++)
 244     {
 245         if (dbg_curr_process->delayed_bp[i].is_symbol &&
 246             !strcmp(name, dbg_curr_process->delayed_bp[i].u.symbol.name) &&
 247             lineno == dbg_curr_process->delayed_bp[i].u.symbol.lineno)
 248             return;
 249     }
 250     dbg_curr_process->delayed_bp = dbg_heap_realloc(dbg_curr_process->delayed_bp,
 251                                                     sizeof(struct dbg_delayed_bp) * ++dbg_curr_process->num_delayed_bp);
 252
 253     dbg_curr_process->delayed_bp[dbg_curr_process->num_delayed_bp - 1].is_symbol = TRUE;
 254     dbg_curr_process->delayed_bp[dbg_curr_process->num_delayed_bp - 1].u.symbol.name = strcpy(HeapAlloc(GetProcessHeap(), 0, strlen(name) + 1), name);
 255     dbg_curr_process->delayed_bp[dbg_curr_process->num_delayed_bp - 1].u.symbol.lineno = lineno;
 256 }
 257
 258 /***********************************************************************
 259  *           break_add_break_from_lineno
 260  *
 261  * Add a breakpoint from a line number in current file
 262  */
 263 void    break_add_break_from_lineno(int lineno)
 264 {
 265     ADDRESS             addr;
 266
 267     memory_get_current_pc(&addr);
 268
 269     if (lineno != -1)
 270     {
 271         IMAGEHLP_LINE   il;
 272         IMAGEHLP_LINE   iil;
 273         BOOL            found = FALSE;
 274         DWORD           disp;
 275
 276         il.SizeOfStruct = sizeof(il);
 277         if (!SymGetLineFromAddr(dbg_curr_process->handle,
 278                                 (DWORD)memory_to_linear_addr(&addr), &disp, &il))
 279         {
 280             dbg_printf("Unable to add breakpoint (unknown address)\n");
 281             return;
 282         }
 283
 284         iil = il;
 285         while (SymGetLinePrev(dbg_curr_process->handle, &iil))
 286         {
 287             if (lineno == iil.LineNumber && !strcmp(il.FileName, iil.FileName))
 288             {
 289                 addr.Mode = AddrModeFlat;
 290                 addr.Offset = iil.Address;
 291                 found = TRUE;
 292                 break;
 293             }
 294         }
 295         iil = il;
 296         if (!found) while (SymGetLineNext(dbg_curr_process->handle, &iil))
 297         {
 298             if (lineno == iil.LineNumber && !strcmp(il.FileName, iil.FileName))
 299             {
 300                 addr.Mode = AddrModeFlat;
 301                 addr.Offset = iil.Address;
 302                 found = TRUE;
 303                 break;
 304             }
 305         }
 306         if (!found)
 307         {
 308             dbg_printf("Unknown line number\n"
 309                        "(either out of file, or no code at given line number)\n");
 310             return;
 311         }
 312     }
 313
 314     break_add_break(&addr, TRUE);
 315 }
 316
 317 /***********************************************************************
 318  *           break_check_delayed_bp
 319  *
 320  * Check is a registered delayed BP is now available.
 321  */
 322 void break_check_delayed_bp(void)
 323 {
 324     struct dbg_lvalue           lvalue;
 325     int                         i;
 326     struct dbg_delayed_bp*      dbp = dbg_curr_process->delayed_bp;
 327
 328     for (i = 0; i < dbg_curr_process->num_delayed_bp; i++)
 329     {
 330         if (dbp[i].is_symbol)
 331         {
 332             if (symbol_get_lvalue(dbp[i].u.symbol.name, dbp[i].u.symbol.lineno,
 333                                   &lvalue, TRUE) != sglv_found)
 334                 continue;
 335             if (lvalue.cookie != DLV_TARGET) continue;
 336         }
 337         else
 338             lvalue.addr = dbp[i].u.addr;
 339         WINE_TRACE("trying to add delayed %s-bp\n", dbp[i].is_symbol ? "S" : "A");
 340         if (!dbp[i].is_symbol)
 341             WINE_TRACE("\t%04x:%08lx\n",
 342                        dbp[i].u.addr.Segment, dbp[i].u.addr.Offset);
 343         else
 344             WINE_TRACE("\t'%s' @ %d\n",
 345                        dbp[i].u.symbol.name, dbp[i].u.symbol.lineno);
 346
 347         if (break_add_break(&lvalue.addr, FALSE))
 348             memmove(&dbp[i], &dbp[i+1], (--dbg_curr_process->num_delayed_bp - i) * sizeof(*dbp));
 349     }
 350 }
 351
 352 /***********************************************************************
 353  *           break_add_watch
 354  *
 355  * Add a watchpoint.
 356  */
 357 static void break_add_watch(const struct dbg_lvalue* lvalue, BOOL is_write)
 358 {
 359     int         num;
 360     DWORD       l = 4;
 361
 362     num = init_xpoint((is_write) ? be_xpoint_watch_write : be_xpoint_watch_read,
 363                       &lvalue->addr);
 364     if (num == -1) return;
 365
 366     if (lvalue->type.id != dbg_itype_none)
 367     {
 368         if (types_get_info(&lvalue->type, TI_GET_LENGTH, &l))
 369         {
 370             switch (l)
 371             {
 372             case 4: case 2: case 1: break;
 373             default:
 374                 dbg_printf("Unsupported length (%lu) for watch-points, defaulting to 4\n", l);
 375                 break;
 376             }
 377         }
 378         else dbg_printf("Cannot get watch size, defaulting to 4\n");
 379     }
 380     dbg_curr_process->bp[num].w.len = l - 1;
 381
 382     if (!get_watched_value(num, &dbg_curr_process->bp[num].w.oldval))
 383     {
 384         dbg_printf("Bad address. Watchpoint not set\n");
 385         dbg_curr_process->bp[num].refcount = 0;
 386         return;
 387     }
 388     dbg_printf("Watchpoint %d at ", num);
 389     print_address(&dbg_curr_process->bp[num].addr, TRUE);
 390     dbg_printf("\n");
 391 }
 392
 393 /******************************************************************
 394  *              break_add_watch_from_lvalue
 395  *
 396  * Adds a watch point from an address (stored in a lvalue)
 397  */
 398 void break_add_watch_from_lvalue(const struct dbg_lvalue* lvalue)
 399 {
 400     struct dbg_lvalue   lval;
 401
 402     lval.addr.Mode = AddrModeFlat;
 403     lval.addr.Offset = types_extract_as_integer(lvalue);
 404     lval.type.id = dbg_itype_none;
 405
 406     break_add_watch(&lval, TRUE);
 407 }
 408
 409 /***********************************************************************
 410  *           break_add_watch_from_id
 411  *
 412  * Add a watchpoint from a symbol name
 413  */
 414 void    break_add_watch_from_id(const char *name)
 415 {
 416     struct dbg_lvalue    lvalue;
 417
 418     switch (symbol_get_lvalue(name, -1, &lvalue, TRUE))
 419     {
 420     case sglv_found:
 421         break_add_watch(&lvalue, 1);
 422         break;
 423     case sglv_unknown:
 424         dbg_printf("Unable to add watchpoint\n");
 425         break;
 426     case sglv_aborted: /* user aborted symbol lookup */
 427         break;
 428     }
 429 }
 430
 431 /***********************************************************************
 432  *           break_delete_xpoint
 433  *
 434  * Delete a breakpoint.
 435  */
 436 void break_delete_xpoint(int num)
 437 {
 438     struct dbg_breakpoint*      bp = dbg_curr_process->bp;
 439
 440     if ((num <= 0) || (num >= dbg_curr_process->next_bp) ||
 441         bp[num].refcount == 0)
 442     {
 443         dbg_printf("Invalid breakpoint number %d\n", num);
 444         return;
 445     }
 446
 447     if (--bp[num].refcount > 0)
 448         return;
 449
 450     if (bp[num].condition != NULL)
 451     {
 452         expr_free(bp[num].condition);
 453         bp[num].condition = NULL;
 454     }
 455
 456     bp[num].enabled = FALSE;
 457     bp[num].refcount = 0;
 458     bp[num].skipcount = 0;
 459 }
 460
 461 static inline BOOL module_is_container(const IMAGEHLP_MODULE* wmod_cntnr,
 462                                      const IMAGEHLP_MODULE* wmod_child)
 463 {
 464     return wmod_cntnr->BaseOfImage <= wmod_child->BaseOfImage &&
 465         (DWORD)wmod_cntnr->BaseOfImage + wmod_cntnr->ImageSize >=
 466         (DWORD)wmod_child->BaseOfImage + wmod_child->ImageSize;
 467 }
 468
 469 /******************************************************************
 470  *              break_delete_xpoints_from_module
 471  *
 472  * Remove all Xpoints from module which base is 'base'
 473  */
 474 void break_delete_xpoints_from_module(unsigned long base)
 475 {
 476     IMAGEHLP_MODULE             im, im_elf;
 477     int                         i;
 478     DWORD                       linear;
 479     struct dbg_breakpoint*      bp = dbg_curr_process->bp;
 480
 481     /* FIXME: should do it also on the ELF sibbling if any */
 482     im.SizeOfStruct = sizeof(im);
 483     im_elf.SizeOfStruct = sizeof(im_elf);
 484     if (!SymGetModuleInfo(dbg_curr_process->handle, base, &im)) return;
 485
 486     /* try to get in fact the underlying ELF module (if any) */
 487     if (SymGetModuleInfo(dbg_curr_process->handle, im.BaseOfImage - 1, &im_elf) &&
 488         im_elf.BaseOfImage <= im.BaseOfImage &&
 489         (DWORD)im_elf.BaseOfImage + im_elf.ImageSize >= (DWORD)im.BaseOfImage + im.ImageSize)
 490         im = im_elf;
 491
 492     for (i = 0; i < dbg_curr_process->next_bp; i++)
 493     {
 494         linear = (DWORD)memory_to_linear_addr(&bp[i].addr);
 495         if (bp[i].refcount && bp[i].enabled &&
 496             im.BaseOfImage <= linear && linear < im.BaseOfImage + im.ImageSize)
 497         {
 498             break_delete_xpoint(i);
 499         }
 500     }
 501 }
 502
 503 /***********************************************************************
 504  *           break_enable_xpoint
 505  *
 506  * Enable or disable a break point.
 507  */
 508 void break_enable_xpoint(int num, BOOL enable)
 509 {
 510     if ((num <= 0) || (num >= dbg_curr_process->next_bp) ||
 511         dbg_curr_process->bp[num].refcount == 0)
 512     {
 513         dbg_printf("Invalid breakpoint number %d\n", num);
 514         return;
 515     }
 516     dbg_curr_process->bp[num].enabled = (enable) ? TRUE : FALSE;
 517     dbg_curr_process->bp[num].skipcount = 0;
 518 }
 519
 520
 521 /***********************************************************************
 522  *           find_triggered_watch
 523  *
 524  * Lookup the watchpoints to see if one has been triggered
 525  * Return >= (watch point index) if one is found and *oldval is set to
 526  *      the value watched before the TRAP
 527  * Return -1 if none found (*oldval is undetermined)
 528  *
 529  * Unfortunately, Linux does *NOT* (A REAL PITA) report with ptrace
 530  * the DR6 register value, so we have to look with our own need the
 531  * cause of the TRAP.
 532  * -EP
 533  */
 534 static int find_triggered_watch(LPDWORD oldval)
 535 {
 536     int                         found = -1;
 537     int                         i;
 538     struct dbg_breakpoint*      bp = dbg_curr_process->bp;
 539
 540     /* Method 1 => get triggered watchpoint from context (doesn't work on Linux
 541      * 2.2.x). This should be fixed in >= 2.2.16
 542      */
 543     for (i = 0; i < dbg_curr_process->next_bp; i++)
 544     {
 545         DWORD val = 0;
 546
 547         if (bp[i].refcount && bp[i].enabled && bp[i].xpoint_type != be_xpoint_break &&
 548             (be_cpu->is_watchpoint_set(&dbg_context, bp[i].info)))
 549         {
 550             be_cpu->clear_watchpoint(&dbg_context, bp[i].info);
 551
 552             *oldval = bp[i].w.oldval;
 553             if (get_watched_value(i, &val))
 554             {
 555                 bp[i].w.oldval = val;
 556                 return i;
 557             }
 558         }
 559     }
 560
 561     /* Method 1 failed, trying method 2 */
 562
 563     /* Method 2 => check if value has changed among registered watchpoints
 564      * this really sucks, but this is how gdb 4.18 works on my linux box
 565      * -EP
 566      */
 567     for (i = 0; i < dbg_curr_process->next_bp; i++)
 568     {
 569         DWORD val = 0;
 570
 571         if (bp[i].refcount && bp[i].enabled && bp[i].xpoint_type != be_xpoint_break &&
 572             get_watched_value(i, &val))
 573         {
 574             *oldval = bp[i].w.oldval;
 575             if (val != *oldval)
 576             {
 577                 be_cpu->clear_watchpoint(&dbg_context, bp[i].info);
 578                 bp[i].w.oldval = val;
 579                 found = i;
 580                 /* cannot break, because two watch points may have been triggered on
 581                  * the same access
 582                  * only one will be reported to the user (FIXME ?)
 583                  */
 584             }
 585         }
 586     }
 587     return found;
 588 }
 589
 590 /***********************************************************************
 591  *           break_info
 592  *
 593  * Display break & watch points information.
 594  */
 595 void break_info(void)
 596 {
 597     int                         i;
 598     int                         nbp = 0, nwp = 0;
 599     struct dbg_delayed_bp*      dbp = dbg_curr_process->delayed_bp;
 600     struct dbg_breakpoint*      bp = dbg_curr_process->bp;
 601
 602     for (i = 1; i < dbg_curr_process->next_bp; i++)
 603     {
 604         if (bp[i].refcount)
 605         {
 606             if (bp[i].xpoint_type == be_xpoint_break) nbp++; else nwp++;
 607         }
 608     }
 609
 610     if (nbp)
 611     {
 612         dbg_printf("Breakpoints:\n");
 613         for (i = 1; i < dbg_curr_process->next_bp; i++)
 614         {
 615             if (!bp[i].refcount || bp[i].xpoint_type != be_xpoint_break)
 616                 continue;
 617             dbg_printf("%d: %c ", i, bp[i].enabled ? 'y' : 'n');
 618             print_address(&bp[i].addr, TRUE);
 619             dbg_printf(" (%u)\n", bp[i].refcount);
 620             if (bp[i].condition != NULL)
 621             {
 622                 dbg_printf("\t\tstop when  ");
 623                 expr_print(bp[i].condition);
 624                 dbg_printf("\n");
 625             }
 626         }
 627     }
 628     else dbg_printf("No breakpoints\n");
 629     if (nwp)
 630     {
 631         dbg_printf("Watchpoints:\n");
 632         for (i = 1; i < dbg_curr_process->next_bp; i++)
 633         {
 634             if (!bp[i].refcount || bp[i].xpoint_type == be_xpoint_break)
 635                 continue;
 636             dbg_printf("%d: %c ", i, bp[i].enabled ? 'y' : 'n');
 637             print_address(&bp[i].addr, TRUE);
 638             dbg_printf(" on %d byte%s (%c)\n",
 639                        bp[i].w.len + 1, bp[i].w.len > 0 ? "s" : "",
 640                        bp[i].xpoint_type == be_xpoint_watch_write ? 'W' : 'R');
 641             if (bp[i].condition != NULL)
 642             {
 643                 dbg_printf("\t\tstop when ");
 644                 expr_print(bp[i].condition);
 645                 dbg_printf("\n");
 646             }
 647         }
 648     }
 649     else dbg_printf("No watchpoints\n");
 650     if (dbg_curr_process->num_delayed_bp)
 651     {
 652         dbg_printf("Delayed breakpoints:\n");
 653         for (i = 0; i < dbg_curr_process->num_delayed_bp; i++)
 654         {
 655             if (dbp[i].is_symbol)
 656             {
 657                 dbg_printf("%d: %s", i, dbp[i].u.symbol.name);
 658                 if (dbp[i].u.symbol.lineno != -1)
 659                     dbg_printf(" at line %u", dbp[i].u.symbol.lineno);
 660             }
 661             else
 662             {
 663                 dbg_printf("%d: ", i);
 664                 print_address(&dbp[i].u.addr, FALSE);
 665             }
 666             dbg_printf("\n");
 667         }
 668     }
 669 }
 670
 671 /***********************************************************************
 672  *           should_stop
 673  *
 674  * Check whether or not the condition (bp / skipcount) of a break/watch
 675  * point are met.
 676  */
 677 static  BOOL should_stop(int bpnum)
 678 {
 679     struct dbg_breakpoint*      bp = &dbg_curr_process->bp[bpnum];
 680
 681     if (bp->condition != NULL)
 682     {
 683         struct dbg_lvalue lvalue = expr_eval(bp->condition);
 684
 685         if (lvalue.type.id == dbg_itype_none)
 686         {
 687             /*
 688              * Something wrong - unable to evaluate this expression.
 689              */
 690             dbg_printf("Unable to evaluate expression ");
 691             expr_print(bp->condition);
 692             dbg_printf("\nTurning off condition\n");
 693             break_add_condition(bpnum, NULL);
 694         }
 695         else if (!types_extract_as_integer(&lvalue))
 696         {
 697             return FALSE;
 698         }
 699     }
 700
 701     if (bp->skipcount > 0) bp->skipcount--;
 702     return bp->skipcount == 0;
 703 }
 704
 705 /***********************************************************************
 706  *           break_should_continue
 707  *
 708  * Determine if we should continue execution after a SIGTRAP signal when
 709  * executing in the given mode.
 710  */
 711 BOOL break_should_continue(ADDRESS* addr, DWORD code, int* count, BOOL* is_break)
 712 {
 713     int                 bpnum;
 714     DWORD               oldval = 0;
 715     int                 wpnum;
 716     enum dbg_exec_mode  mode = dbg_curr_thread->exec_mode;
 717
 718     *is_break = FALSE;
 719     /* If not single-stepping, back up to the break instruction */
 720     if (code == EXCEPTION_BREAKPOINT)
 721         addr->Offset += be_cpu->adjust_pc_for_break(&dbg_context, TRUE);
 722
 723     bpnum = find_xpoint(addr, be_xpoint_break);
 724     dbg_curr_process->bp[0].enabled = FALSE;  /* disable the step-over breakpoint */
 725
 726     if (bpnum > 0)
 727     {
 728         if (!should_stop(bpnum)) return TRUE;
 729
 730         dbg_printf("Stopped on breakpoint %d at ", bpnum);
 731         print_address(&dbg_curr_process->bp[bpnum].addr, TRUE);
 732         dbg_printf("\n");
 733         return FALSE;
 734     }
 735
 736     wpnum = find_triggered_watch(&oldval);
 737     if (wpnum > 0)
 738     {
 739         /* If not single-stepping, do not back up over the break instruction */
 740         if (code == EXCEPTION_BREAKPOINT)
 741             addr->Offset += be_cpu->adjust_pc_for_break(&dbg_context, FALSE);
 742
 743         if (!should_stop(wpnum)) return TRUE;
 744
 745         dbg_printf("Stopped on watchpoint %d at ", wpnum);
 746         print_address(addr, TRUE);
 747         dbg_printf(" values: old=%lu new=%lu\n",
 748                      oldval, dbg_curr_process->bp[wpnum].w.oldval);
 749         return FALSE;
 750     }
 751
 752     /*
 753      * If our mode indicates that we are stepping line numbers,
 754      * get the current function, and figure out if we are exactly
 755      * on a line number or not.
 756      */
 757     if (mode == dbg_exec_step_over_line || mode == dbg_exec_step_into_line)
 758     {
 759         if (symbol_get_function_line_status(addr) == dbg_on_a_line_number)
 760         {
 761             (*count)--;
 762         }
 763     }
 764     else if (mode == dbg_exec_step_over_insn || mode == dbg_exec_step_into_insn)
 765     {
 766         (*count)--;
 767     }
 768
 769     if (*count > 0 || mode == dbg_exec_finish)
 770     {
 771         /*
 772          * We still need to execute more instructions.
 773          */
 774         return TRUE;
 775     }
 776
 777     /* If there's no breakpoint and we are not single-stepping, then
 778      * either we must have encountered a break insn in the Windows program
 779      * or someone is trying to stop us
 780      */
 781     if (bpnum == -1 && code == EXCEPTION_BREAKPOINT)
 782     {
 783         *is_break = TRUE;
 784         addr->Offset += be_cpu->adjust_pc_for_break(&dbg_context, FALSE);
 785         return FALSE;
 786     }
 787
 788     /* no breakpoint, continue if in continuous mode */
 789     return mode == dbg_exec_cont || mode == dbg_exec_finish;
 790 }
 791
 792 /***********************************************************************
 793  *           break_suspend_execution
 794  *
 795  * Remove all bp before entering the debug loop
 796  */
 797 void    break_suspend_execution(void)
 798 {
 799     break_set_xpoints(FALSE);
 800     dbg_curr_process->bp[0] = dbg_curr_thread->step_over_bp;
 801 }
 802
 803 /***********************************************************************
 804  *           break_restart_execution
 805  *
 806  * Set the bp to the correct state to restart execution
 807  * in the given mode.
 808  */
 809 void break_restart_execution(int count)
 810 {
 811     ADDRESS                     addr;
 812     int                         bp;
 813     enum dbg_line_status        status;
 814     enum dbg_exec_mode          mode, ret_mode;
 815     ADDRESS                     callee;
 816     void*                       linear;
 817
 818     memory_get_current_pc(&addr);
 819     linear = memory_to_linear_addr(&addr);
 820
 821     /*
 822      * This is the mode we will be running in after we finish.  We would like
 823      * to be able to modify this in certain cases.
 824      */
 825     ret_mode = mode = dbg_curr_thread->exec_mode;
 826
 827     bp = find_xpoint(&addr, be_xpoint_break);
 828     if (bp != -1 && bp != 0)
 829     {
 830         /*
 831          * If we have set a new value, then save it in the BP number.
 832          */
 833         if (count != 0 && mode == dbg_exec_cont)
 834         {
 835             dbg_curr_process->bp[bp].skipcount = count;
 836         }
 837         mode = dbg_exec_step_into_insn;  /* If there's a breakpoint, skip it */
 838     }
 839     else if (mode == dbg_exec_cont && count > 1)
 840     {
 841         dbg_printf("Not stopped at any breakpoint; argument ignored.\n");
 842     }
 843
 844     if (mode == dbg_exec_finish && be_cpu->is_function_return(linear))
 845     {
 846         mode = ret_mode = dbg_exec_step_into_insn;
 847     }
 848
 849     /*
 850      * See if the function we are stepping into has debug info
 851      * and line numbers.  If not, then we step over it instead.
 852      * FIXME - we need to check for things like thunks or trampolines,
 853      * as the actual function may in fact have debug info.
 854      */
 855     if (be_cpu->is_function_call(linear, &callee))
 856     {
 857         status = symbol_get_function_line_status(&callee);
 858 #if 0
 859         /* FIXME: we need to get the thunk type */
 860         /*
 861          * Anytime we have a trampoline, step over it.
 862          */
 863         if ((mode == EXEC_STEP_OVER || mode == EXEC_STEPI_OVER)
 864             && status == dbg_in_a_thunk)
 865         {
 866             WINE_WARN("Not stepping into trampoline at %p (no lines)\n",
 867                       memory_to_linear_addr(&callee));
 868             mode = EXEC_STEP_OVER_TRAMPOLINE;
 869         }
 870 #endif
 871         if (mode == dbg_exec_step_into_line && status == dbg_no_line_info)
 872         {
 873             WINE_WARN("Not stepping into function at %p (no lines)\n",
 874                       memory_to_linear_addr(&callee));
 875             mode = dbg_exec_step_over_line;
 876         }
 877     }
 878
 879     if (mode == dbg_exec_step_into_line &&
 880         symbol_get_function_line_status(&addr) == dbg_no_line_info)
 881     {
 882         dbg_printf("Single stepping until exit from function, \n"
 883                    "which has no line number information.\n");
 884         ret_mode = mode = dbg_exec_finish;
 885     }
 886
 887     switch (mode)
 888     {
 889     case dbg_exec_cont: /* Continuous execution */
 890         be_cpu->single_step(&dbg_context, FALSE);
 891         break_set_xpoints(TRUE);
 892         break;
 893
 894 #if 0
 895     case EXEC_STEP_OVER_TRAMPOLINE:
 896         /*
 897          * This is the means by which we step over our conversion stubs
 898          * in callfrom*.s and callto*.s.  We dig the appropriate address
 899          * off the stack, and we set the breakpoint there instead of the
 900          * address just after the call.
 901          */
 902         be_cpu->get_addr(dbg_curr_thread->handle, &dbg_context,
 903                          be_cpu_addr_stack, &addr);
 904         /* FIXME: we assume stack grows as on an i386 */
 905         addr.Offset += 2 * sizeof(unsigned int);
 906         dbg_read_memory(memory_to_linear_addr(&addr),
 907                         &addr.Offset, sizeof(addr.Offset));
 908         dbg_curr_process->bp[0].addr = addr;
 909         dbg_curr_process->bp[0].enabled = TRUE;
 910         dbg_curr_process->bp[0].refcount = 1;
 911         dbg_curr_process->bp[0].skipcount = 0;
 912         dbg_curr_process->bp[0].xpoint_type = be_xpoint_break;
 913         dbg_curr_process->bp[0].condition = NULL;
 914         be_cpu->single_step(&dbg_context, FALSE);
 915         break_set_xpoints(TRUE);
 916         break;
 917 #endif
 918
 919     case dbg_exec_finish:
 920     case dbg_exec_step_over_insn:  /* Stepping over a call */
 921     case dbg_exec_step_over_line:  /* Stepping over a call */
 922         if (be_cpu->is_step_over_insn(linear))
 923         {
 924             be_cpu->disasm_one_insn(&addr, FALSE);
 925             dbg_curr_process->bp[0].addr = addr;
 926             dbg_curr_process->bp[0].enabled = TRUE;
 927             dbg_curr_process->bp[0].refcount = 1;
 928             dbg_curr_process->bp[0].skipcount = 0;
 929             dbg_curr_process->bp[0].xpoint_type = be_xpoint_break;
 930             dbg_curr_process->bp[0].condition = NULL;
 931             be_cpu->single_step(&dbg_context, FALSE);
 932             break_set_xpoints(TRUE);
 933             break;
 934         }
 935         /* else fall through to single-stepping */
 936
 937     case dbg_exec_step_into_line: /* Single-stepping a line */
 938     case dbg_exec_step_into_insn: /* Single-stepping an instruction */
 939         be_cpu->single_step(&dbg_context, TRUE);
 940         break;
 941     default: RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);
 942     }
 943     dbg_curr_thread->step_over_bp = dbg_curr_process->bp[0];
 944     dbg_curr_thread->exec_mode = ret_mode;
 945 }
 946
 947 int break_add_condition(int num, struct expr* exp)
 948 {
 949     if (num <= 0 || num >= dbg_curr_process->next_bp ||
 950         !dbg_curr_process->bp[num].refcount)
 951     {
 952         dbg_printf("Invalid breakpoint number %d\n", num);
 953         return FALSE;
 954     }
 955
 956     if (dbg_curr_process->bp[num].condition != NULL)
 957     {
 958         expr_free(dbg_curr_process->bp[num].condition);
 959         dbg_curr_process->bp[num].condition = NULL;
 960     }
 961
 962     if (exp != NULL) dbg_curr_process->bp[num].condition = expr_clone(exp, NULL);
 963
 964     return TRUE;
 965 }