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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, 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 static int is_xpoint_break(int bpnum)
  30 {
  31     int type = dbg_curr_process->bp[bpnum].xpoint_type;
  32
  33     if (type == be_xpoint_break || type == be_xpoint_watch_exec) return TRUE;
  34     if (type == be_xpoint_watch_read || type == be_xpoint_watch_write) return FALSE;
  35     RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);
  36     return 0; /* never reached */
  37 }
  38
  39 /***********************************************************************
  40  *           break_set_xpoints
  41  *
  42  * Set or remove all the breakpoints & watchpoints
  43  */
  44 void  break_set_xpoints(BOOL set)
  45 {
  46     static BOOL                 last; /* = 0 = FALSE */
  47
  48     unsigned int                i, ret, size;
  49     void*                       addr;
  50     struct dbg_breakpoint*      bp = dbg_curr_process->bp;
  51
  52     if (set == last) return;
  53     last = set;
  54
  55     for (i = 0; i < dbg_curr_process->next_bp; i++)
  56     {
  57         if (!bp[i].refcount || !bp[i].enabled) continue;
  58
  59         if (is_xpoint_break(i))
  60             size = 0;
  61         else
  62             size = bp[i].w.len + 1;
  63         addr = (void*)memory_to_linear_addr(&bp[i].addr);
  64
  65         if (set)
  66             ret = be_cpu->insert_Xpoint(dbg_curr_process->handle,
  67                                         dbg_curr_process->process_io,
  68                                         &dbg_context, bp[i].xpoint_type, addr,
  69                                         &bp[i].info, size);
  70         else
  71             ret = be_cpu->remove_Xpoint(dbg_curr_process->handle,
  72                                         dbg_curr_process->process_io,
  73                                         &dbg_context, bp[i].xpoint_type, addr,
  74                                         bp[i].info, size);
  75         if (!ret)
  76         {
  77             dbg_printf("Invalid address (");
  78             print_address(&bp[i].addr, FALSE);
  79             dbg_printf(") for breakpoint %d, disabling it\n", i);
  80             bp[i].enabled = FALSE;
  81         }
  82     }
  83 }
  84
  85 /***********************************************************************
  86  *           find_xpoint
  87  *
  88  * Find the breakpoint for a given address. Return the breakpoint
  89  * number or -1 if none.
  90  */
  91 static int find_xpoint(const ADDRESS64* addr, enum be_xpoint_type type)
  92 {
  93     int                         i;
  94     void*                       lin = memory_to_linear_addr(addr);
  95     struct dbg_breakpoint*      bp = dbg_curr_process->bp;
  96
  97     for (i = 0; i < dbg_curr_process->next_bp; i++)
  98     {
  99         if (bp[i].refcount && bp[i].enabled && bp[i].xpoint_type == type &&
 100             memory_to_linear_addr(&bp[i].addr) == lin)
 101             return i;
 102     }
 103     return -1;
 104 }
 105
 106 /***********************************************************************
 107  *           init_xpoint
 108  *
 109  * Find an empty slot in BP table to add a new break/watch point
 110  */
 111 static  int init_xpoint(int type, const ADDRESS64* addr)
 112 {
 113     int                         num;
 114     struct dbg_breakpoint*      bp = dbg_curr_process->bp;
 115
 116     for (num = (dbg_curr_process->next_bp < MAX_BREAKPOINTS) ?
 117              dbg_curr_process->next_bp++ : 1;
 118          num < MAX_BREAKPOINTS; num++)
 119     {
 120         if (bp[num].refcount == 0)
 121         {
 122             bp[num].refcount    = 1;
 123             bp[num].enabled     = TRUE;
 124             bp[num].xpoint_type = type;
 125             bp[num].skipcount   = 0;
 126             bp[num].addr        = *addr;
 127             return num;
 128         }
 129     }
 130
 131     dbg_printf("Too many bp. Please delete some.\n");
 132     return -1;
 133 }
 134
 135 /***********************************************************************
 136  *           get_watched_value
 137  *
 138  * Returns the value watched by watch point 'num'.
 139  */
 140 static  BOOL    get_watched_value(int num, LPDWORD val)
 141 {
 142     BYTE        buf[4];
 143
 144     if (!dbg_read_memory(memory_to_linear_addr(&dbg_curr_process->bp[num].addr),
 145                          buf, dbg_curr_process->bp[num].w.len + 1))
 146         return FALSE;
 147
 148     switch (dbg_curr_process->bp[num].w.len + 1)
 149     {
 150     case 4:     *val = *(DWORD*)buf;    break;
 151     case 2:     *val = *(WORD*)buf;     break;
 152     case 1:     *val = *(BYTE*)buf;     break;
 153     default: RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);
 154     }
 155     return TRUE;
 156 }
 157
 158 /***********************************************************************
 159  *           break_add_break
 160  *
 161  * Add a breakpoint.
 162  */
 163 BOOL break_add_break(const ADDRESS64* addr, BOOL verbose, BOOL swbp)
 164 {
 165     int                         num;
 166     BYTE                        ch;
 167     struct dbg_breakpoint*      bp = dbg_curr_process->bp;
 168     int                         type = swbp ? be_xpoint_break : be_xpoint_watch_exec;
 169
 170     if ((num = find_xpoint(addr, type)) >= 1)
 171     {
 172         bp[num].refcount++;
 173         dbg_printf("Breakpoint %d at ", num);
 174         print_address(&bp[num].addr, TRUE);
 175         dbg_printf(" (refcount=%d)\n", bp[num].refcount);
 176         return TRUE;
 177     }
 178
 179     if (!dbg_read_memory(memory_to_linear_addr(addr), &ch, sizeof(ch)))
 180     {
 181         if (verbose)
 182         {
 183             dbg_printf("Invalid address ");
 184             print_bare_address(addr);
 185             dbg_printf(", can't set breakpoint\n");
 186         }
 187         return FALSE;
 188     }
 189
 190     if ((num = init_xpoint(type, addr)) == -1)
 191         return FALSE;
 192
 193     dbg_printf("Breakpoint %d at ", num);
 194     print_address(&bp[num].addr, TRUE);
 195     dbg_printf("\n");
 196
 197     return TRUE;
 198 }
 199
 200 /***********************************************************************
 201  *           break_add_break_from_lvalue
 202  *
 203  * Add a breakpoint.
 204  */
 205 BOOL break_add_break_from_lvalue(const struct dbg_lvalue* lvalue, BOOL swbp)
 206 {
 207     ADDRESS64   addr;
 208
 209     types_extract_as_address(lvalue, &addr);
 210
 211     if (!break_add_break(&addr, TRUE, swbp))
 212     {
 213         if (!DBG_IVAR(CanDeferOnBPByAddr))
 214         {
 215             dbg_printf("Invalid address, can't set breakpoint\n"
 216                        "You can turn on deferring bp by address by setting $CanDeferOnBPByAddr to 1\n");
 217             return FALSE;
 218         }
 219         dbg_printf("Unable to add breakpoint, will check again any time a new DLL is loaded\n");
 220         dbg_curr_process->delayed_bp =
 221             dbg_heap_realloc(dbg_curr_process->delayed_bp,
 222                              sizeof(struct dbg_delayed_bp) * ++dbg_curr_process->num_delayed_bp);
 223
 224         dbg_curr_process->delayed_bp[dbg_curr_process->num_delayed_bp - 1].is_symbol   = FALSE;
 225         dbg_curr_process->delayed_bp[dbg_curr_process->num_delayed_bp - 1].software_bp = swbp;
 226         dbg_curr_process->delayed_bp[dbg_curr_process->num_delayed_bp - 1].u.addr      = addr;
 227         return TRUE;
 228     }
 229     return FALSE;
 230 }
 231
 232 /***********************************************************************
 233  *           break_add_break_from_id
 234  *
 235  * Add a breakpoint from a function name (and eventually a line #)
 236  */
 237 void    break_add_break_from_id(const char *name, int lineno, BOOL swbp)
 238 {
 239     struct dbg_lvalue   lvalue;
 240     int                 i;
 241
 242     switch (symbol_get_lvalue(name, lineno, &lvalue, TRUE))
 243     {
 244     case sglv_found:
 245         break_add_break(&lvalue.addr, TRUE, swbp);
 246         return;
 247     case sglv_unknown:
 248         break;
 249     case sglv_aborted: /* user aborted symbol lookup */
 250         return;
 251     }
 252
 253     dbg_printf("Unable to add breakpoint, will check again when a new DLL is loaded\n");
 254     for (i = 0; i < dbg_curr_process->num_delayed_bp; i++)
 255     {
 256         if (dbg_curr_process->delayed_bp[i].is_symbol &&
 257             !strcmp(name, dbg_curr_process->delayed_bp[i].u.symbol.name) &&
 258             lineno == dbg_curr_process->delayed_bp[i].u.symbol.lineno)
 259             return;
 260     }
 261     dbg_curr_process->delayed_bp = dbg_heap_realloc(dbg_curr_process->delayed_bp,
 262                                                     sizeof(struct dbg_delayed_bp) * ++dbg_curr_process->num_delayed_bp);
 263
 264     dbg_curr_process->delayed_bp[dbg_curr_process->num_delayed_bp - 1].is_symbol       = TRUE;
 265     dbg_curr_process->delayed_bp[dbg_curr_process->num_delayed_bp - 1].software_bp     = swbp;
 266     dbg_curr_process->delayed_bp[dbg_curr_process->num_delayed_bp - 1].u.symbol.name   = strcpy(HeapAlloc(GetProcessHeap(), 0, strlen(name) + 1), name);
 267     dbg_curr_process->delayed_bp[dbg_curr_process->num_delayed_bp - 1].u.symbol.lineno = lineno;
 268 }
 269
 270 struct cb_break_lineno
 271 {
 272     int         lineno;
 273     ADDRESS64   addr;
 274 };
 275
 276 static BOOL CALLBACK line_cb(SRCCODEINFO* sci, void* user)
 277 {
 278     struct cb_break_lineno*      bkln = user;
 279
 280     if (bkln->lineno == sci->LineNumber)
 281     {
 282         bkln->addr.Mode = AddrModeFlat;
 283         bkln->addr.Offset = sci->Address;
 284         return FALSE;
 285     }
 286     return TRUE;
 287 }
 288
 289 /***********************************************************************
 290  *           break_add_break_from_lineno
 291  *
 292  * Add a breakpoint from a line number in current file
 293  */
 294 void    break_add_break_from_lineno(int lineno, BOOL swbp)
 295 {
 296     struct cb_break_lineno      bkln;
 297
 298     memory_get_current_pc(&bkln.addr);
 299
 300     if (lineno != -1)
 301     {
 302         IMAGEHLP_LINE   il;
 303
 304
 305         DWORD           disp;
 306         DWORD           linear = (DWORD)memory_to_linear_addr(&bkln.addr);
 307
 308         il.SizeOfStruct = sizeof(il);
 309         if (!SymGetLineFromAddr(dbg_curr_process->handle, linear, &disp, &il))
 310
 311         {
 312             dbg_printf("Unable to add breakpoint (unknown address %lx)\n", linear);
 313             return;
 314         }
 315         bkln.addr.Offset = 0;
 316         bkln.lineno = lineno;
 317         SymEnumLines(dbg_curr_process->handle, linear, NULL, il.FileName, line_cb, &bkln);
 318         if (!bkln.addr.Offset)
 319         {
 320             dbg_printf("Unknown line number\n"
 321                        "(either out of file, or no code at given line number)\n");
 322             return;
 323         }
 324     }
 325
 326     break_add_break(&bkln.addr, TRUE, swbp);
 327 }
 328
 329 /***********************************************************************
 330  *           break_check_delayed_bp
 331  *
 332  * Check is a registered delayed BP is now available.
 333  */
 334 void break_check_delayed_bp(void)
 335 {
 336     struct dbg_lvalue           lvalue;
 337     int                         i;
 338     struct dbg_delayed_bp*      dbp = dbg_curr_process->delayed_bp;
 339     char                        hexbuf[MAX_OFFSET_TO_STR_LEN];
 340
 341     for (i = 0; i < dbg_curr_process->num_delayed_bp; i++)
 342     {
 343         if (dbp[i].is_symbol)
 344         {
 345             if (symbol_get_lvalue(dbp[i].u.symbol.name, dbp[i].u.symbol.lineno,
 346                                   &lvalue, TRUE) != sglv_found)
 347                 continue;
 348             if (lvalue.cookie != DLV_TARGET) continue;
 349         }
 350         else
 351             lvalue.addr = dbp[i].u.addr;
 352         WINE_TRACE("trying to add delayed %s-bp\n", dbp[i].is_symbol ? "S" : "A");
 353         if (!dbp[i].is_symbol)
 354             WINE_TRACE("\t%04x:%s\n",
 355                        dbp[i].u.addr.Segment,
 356                        memory_offset_to_string(hexbuf, dbp[i].u.addr.Offset, 0));
 357         else
 358             WINE_TRACE("\t'%s' @ %d\n",
 359                        dbp[i].u.symbol.name, dbp[i].u.symbol.lineno);
 360
 361         if (break_add_break(&lvalue.addr, FALSE, dbp[i].software_bp))
 362             memmove(&dbp[i], &dbp[i+1], (--dbg_curr_process->num_delayed_bp - i) * sizeof(*dbp));
 363     }
 364 }
 365
 366 /***********************************************************************
 367  *           break_add_watch
 368  *
 369  * Add a watchpoint.
 370  */
 371 static void break_add_watch(const struct dbg_lvalue* lvalue, BOOL is_write)
 372 {
 373     int         num;
 374     DWORD64     l = 4;
 375
 376     num = init_xpoint((is_write) ? be_xpoint_watch_write : be_xpoint_watch_read,
 377                       &lvalue->addr);
 378     if (num == -1) return;
 379
 380     if (lvalue->type.id != dbg_itype_none)
 381     {
 382         if (types_get_info(&lvalue->type, TI_GET_LENGTH, &l))
 383         {
 384             switch (l)
 385             {
 386             case 4: case 2: case 1: break;
 387             default:
 388                 dbg_printf("Unsupported length (%s) for watch-points, defaulting to 4\n",
 389                            wine_dbgstr_longlong(l));
 390                 break;
 391             }
 392         }
 393         else dbg_printf("Cannot get watch size, defaulting to 4\n");
 394     }
 395     dbg_curr_process->bp[num].w.len = (DWORD)l - 1;
 396
 397     if (!get_watched_value(num, &dbg_curr_process->bp[num].w.oldval))
 398     {
 399         dbg_printf("Bad address. Watchpoint not set\n");
 400         dbg_curr_process->bp[num].refcount = 0;
 401         return;
 402     }
 403     dbg_printf("Watchpoint %d at ", num);
 404     print_address(&dbg_curr_process->bp[num].addr, TRUE);
 405     dbg_printf("\n");
 406 }
 407
 408 /******************************************************************
 409  *              break_add_watch_from_lvalue
 410  *
 411  * Adds a watch point from an address (stored in a lvalue)
 412  */
 413 void break_add_watch_from_lvalue(const struct dbg_lvalue* lvalue)
 414 {
 415     struct dbg_lvalue   lval;
 416
 417     types_extract_as_address(lvalue, &lval.addr);
 418     lval.type.id = dbg_itype_none;
 419
 420     break_add_watch(&lval, TRUE);
 421 }
 422
 423 /***********************************************************************
 424  *           break_add_watch_from_id
 425  *
 426  * Add a watchpoint from a symbol name
 427  */
 428 void    break_add_watch_from_id(const char *name)
 429 {
 430     struct dbg_lvalue    lvalue;
 431
 432     switch (symbol_get_lvalue(name, -1, &lvalue, TRUE))
 433     {
 434     case sglv_found:
 435         break_add_watch(&lvalue, 1);
 436         break;
 437     case sglv_unknown:
 438         dbg_printf("Unable to add watchpoint\n");
 439         break;
 440     case sglv_aborted: /* user aborted symbol lookup */
 441         break;
 442     }
 443 }
 444
 445 /***********************************************************************
 446  *           break_delete_xpoint
 447  *
 448  * Delete a breakpoint.
 449  */
 450 void break_delete_xpoint(int num)
 451 {
 452     struct dbg_breakpoint*      bp = dbg_curr_process->bp;
 453
 454     if ((num <= 0) || (num >= dbg_curr_process->next_bp) ||
 455         bp[num].refcount == 0)
 456     {
 457         dbg_printf("Invalid breakpoint number %d\n", num);
 458         return;
 459     }
 460
 461     if (--bp[num].refcount > 0)
 462         return;
 463
 464     if (bp[num].condition != NULL)
 465     {
 466         expr_free(bp[num].condition);
 467         bp[num].condition = NULL;
 468     }
 469
 470     bp[num].enabled = FALSE;
 471     bp[num].refcount = 0;
 472     bp[num].skipcount = 0;
 473 }
 474
 475 static inline BOOL module_is_container(const IMAGEHLP_MODULE* wmod_cntnr,
 476                                      const IMAGEHLP_MODULE* wmod_child)
 477 {
 478     return wmod_cntnr->BaseOfImage <= wmod_child->BaseOfImage &&
 479         (DWORD)wmod_cntnr->BaseOfImage + wmod_cntnr->ImageSize >=
 480         (DWORD)wmod_child->BaseOfImage + wmod_child->ImageSize;
 481 }
 482
 483 /******************************************************************
 484  *              break_delete_xpoints_from_module
 485  *
 486  * Remove all Xpoints from module which base is 'base'
 487  */
 488 void break_delete_xpoints_from_module(unsigned long base)
 489 {
 490     IMAGEHLP_MODULE             im, im_elf;
 491     int                         i;
 492     DWORD                       linear;
 493     struct dbg_breakpoint*      bp = dbg_curr_process->bp;
 494
 495     /* FIXME: should do it also on the ELF sibbling if any */
 496     im.SizeOfStruct = sizeof(im);
 497     im_elf.SizeOfStruct = sizeof(im_elf);
 498     if (!SymGetModuleInfo(dbg_curr_process->handle, base, &im)) return;
 499
 500     /* try to get in fact the underlying ELF module (if any) */
 501     if (SymGetModuleInfo(dbg_curr_process->handle, im.BaseOfImage - 1, &im_elf) &&
 502         im_elf.BaseOfImage <= im.BaseOfImage &&
 503         (DWORD)im_elf.BaseOfImage + im_elf.ImageSize >= (DWORD)im.BaseOfImage + im.ImageSize)
 504         im = im_elf;
 505
 506     for (i = 0; i < dbg_curr_process->next_bp; i++)
 507     {
 508         linear = (DWORD)memory_to_linear_addr(&bp[i].addr);
 509         if (bp[i].refcount && bp[i].enabled &&
 510             im.BaseOfImage <= linear && linear < im.BaseOfImage + im.ImageSize)
 511         {
 512             break_delete_xpoint(i);
 513         }
 514     }
 515 }
 516
 517 /***********************************************************************
 518  *           break_enable_xpoint
 519  *
 520  * Enable or disable a break point.
 521  */
 522 void break_enable_xpoint(int num, BOOL enable)
 523 {
 524     if ((num <= 0) || (num >= dbg_curr_process->next_bp) ||
 525         dbg_curr_process->bp[num].refcount == 0)
 526     {
 527         dbg_printf("Invalid breakpoint number %d\n", num);
 528         return;
 529     }
 530     dbg_curr_process->bp[num].enabled = (enable) ? TRUE : FALSE;
 531     dbg_curr_process->bp[num].skipcount = 0;
 532 }
 533
 534
 535 /***********************************************************************
 536  *           find_triggered_watch
 537  *
 538  * Lookup the watchpoints to see if one has been triggered
 539  * Return >= (watch point index) if one is found and *oldval is set to
 540  *      the value watched before the TRAP
 541  * Return -1 if none found (*oldval is undetermined)
 542  *
 543  * Unfortunately, Linux does *NOT* (A REAL PITA) report with ptrace
 544  * the DR6 register value, so we have to look with our own need the
 545  * cause of the TRAP.
 546  * -EP
 547  */
 548 static int find_triggered_watch(LPDWORD oldval)
 549 {
 550     int                         found = -1;
 551     int                         i;
 552     struct dbg_breakpoint*      bp = dbg_curr_process->bp;
 553
 554     /* Method 1 => get triggered watchpoint from context (doesn't work on Linux
 555      * 2.2.x). This should be fixed in >= 2.2.16
 556      */
 557     for (i = 0; i < dbg_curr_process->next_bp; i++)
 558     {
 559         DWORD val = 0;
 560
 561         if (bp[i].refcount && bp[i].enabled && !is_xpoint_break(i) &&
 562             (be_cpu->is_watchpoint_set(&dbg_context, bp[i].info)))
 563         {
 564             be_cpu->clear_watchpoint(&dbg_context, bp[i].info);
 565
 566             *oldval = bp[i].w.oldval;
 567             if (get_watched_value(i, &val))
 568             {
 569                 bp[i].w.oldval = val;
 570                 return i;
 571             }
 572         }
 573     }
 574
 575     /* Method 1 failed, trying method 2 */
 576
 577     /* Method 2 => check if value has changed among registered watchpoints
 578      * this really sucks, but this is how gdb 4.18 works on my linux box
 579      * -EP
 580      */
 581     for (i = 0; i < dbg_curr_process->next_bp; i++)
 582     {
 583         DWORD val = 0;
 584
 585         if (bp[i].refcount && bp[i].enabled && !is_xpoint_break(i) &&
 586             get_watched_value(i, &val))
 587         {
 588             *oldval = bp[i].w.oldval;
 589             if (val != *oldval)
 590             {
 591                 be_cpu->clear_watchpoint(&dbg_context, bp[i].info);
 592                 bp[i].w.oldval = val;
 593                 found = i;
 594                 /* cannot break, because two watch points may have been triggered on
 595                  * the same access
 596                  * only one will be reported to the user (FIXME ?)
 597                  */
 598             }
 599         }
 600     }
 601     return found;
 602 }
 603
 604 /***********************************************************************
 605  *           break_info
 606  *
 607  * Display break & watch points information.
 608  */
 609 void break_info(void)
 610 {
 611     int                         i;
 612     int                         nbp = 0, nwp = 0;
 613     struct dbg_delayed_bp*      dbp = dbg_curr_process->delayed_bp;
 614     struct dbg_breakpoint*      bp = dbg_curr_process->bp;
 615
 616     for (i = 1; i < dbg_curr_process->next_bp; i++)
 617     {
 618         if (bp[i].refcount)
 619         {
 620             if (is_xpoint_break(i)) nbp++; else nwp++;
 621         }
 622     }
 623
 624     if (nbp)
 625     {
 626         dbg_printf("Breakpoints:\n");
 627         for (i = 1; i < dbg_curr_process->next_bp; i++)
 628         {
 629             if (!bp[i].refcount || !is_xpoint_break(i))
 630                 continue;
 631             dbg_printf("%d: %c ", i, bp[i].enabled ? 'y' : 'n');
 632             print_address(&bp[i].addr, TRUE);
 633             dbg_printf(" (%u)%s\n", bp[i].refcount,
 634                        bp[i].xpoint_type == be_xpoint_watch_exec ? " (hardware assisted)" : "");
 635             if (bp[i].condition != NULL)
 636             {
 637                 dbg_printf("\t\tstop when  ");
 638                 expr_print(bp[i].condition);
 639                 dbg_printf("\n");
 640             }
 641         }
 642     }
 643     else dbg_printf("No breakpoints\n");
 644     if (nwp)
 645     {
 646         dbg_printf("Watchpoints:\n");
 647         for (i = 1; i < dbg_curr_process->next_bp; i++)
 648         {
 649             if (!bp[i].refcount || is_xpoint_break(i))
 650                 continue;
 651             dbg_printf("%d: %c ", i, bp[i].enabled ? 'y' : 'n');
 652             print_address(&bp[i].addr, TRUE);
 653             dbg_printf(" on %d byte%s (%c)\n",
 654                        bp[i].w.len + 1, bp[i].w.len > 0 ? "s" : "",
 655                        bp[i].xpoint_type == be_xpoint_watch_write ? 'W' : 'R');
 656             if (bp[i].condition != NULL)
 657             {
 658                 dbg_printf("\t\tstop when ");
 659                 expr_print(bp[i].condition);
 660                 dbg_printf("\n");
 661             }
 662         }
 663     }
 664     else dbg_printf("No watchpoints\n");
 665     if (dbg_curr_process->num_delayed_bp)
 666     {
 667         dbg_printf("Delayed breakpoints:\n");
 668         for (i = 0; i < dbg_curr_process->num_delayed_bp; i++)
 669         {
 670             if (dbp[i].is_symbol)
 671             {
 672                 dbg_printf("%d: %s", i, dbp[i].u.symbol.name);
 673                 if (dbp[i].u.symbol.lineno != -1)
 674                     dbg_printf(" at line %u", dbp[i].u.symbol.lineno);
 675             }
 676             else
 677             {
 678                 dbg_printf("%d: ", i);
 679                 print_address(&dbp[i].u.addr, FALSE);
 680             }
 681             dbg_printf("\n");
 682         }
 683     }
 684 }
 685
 686 /***********************************************************************
 687  *           should_stop
 688  *
 689  * Check whether or not the condition (bp / skipcount) of a break/watch
 690  * point are met.
 691  */
 692 static  BOOL should_stop(int bpnum)
 693 {
 694     struct dbg_breakpoint*      bp = &dbg_curr_process->bp[bpnum];
 695
 696     if (bp->condition != NULL)
 697     {
 698         struct dbg_lvalue lvalue = expr_eval(bp->condition);
 699
 700         if (lvalue.type.id == dbg_itype_none)
 701         {
 702             /*
 703              * Something wrong - unable to evaluate this expression.
 704              */
 705             dbg_printf("Unable to evaluate expression ");
 706             expr_print(bp->condition);
 707             dbg_printf("\nTurning off condition\n");
 708             break_add_condition(bpnum, NULL);
 709         }
 710         else if (!types_extract_as_integer(&lvalue))
 711         {
 712             return FALSE;
 713         }
 714     }
 715
 716     if (bp->skipcount > 0) bp->skipcount--;
 717     return bp->skipcount == 0;
 718 }
 719
 720 /***********************************************************************
 721  *           break_should_continue
 722  *
 723  * Determine if we should continue execution after a SIGTRAP signal when
 724  * executing in the given mode.
 725  */
 726 BOOL break_should_continue(ADDRESS64* addr, DWORD code)
 727 {
 728     DWORD               oldval = 0;
 729     enum dbg_exec_mode  mode = dbg_curr_thread->exec_mode;
 730
 731
 732     if (dbg_curr_thread->stopped_xpoint > 0)
 733     {
 734         if (!should_stop(dbg_curr_thread->stopped_xpoint)) return TRUE;
 735
 736         switch (dbg_curr_process->bp[dbg_curr_thread->stopped_xpoint].xpoint_type)
 737         {
 738         case be_xpoint_break:
 739         case be_xpoint_watch_exec:
 740             dbg_printf("Stopped on breakpoint %d at ", dbg_curr_thread->stopped_xpoint);
 741             print_address(&dbg_curr_process->bp[dbg_curr_thread->stopped_xpoint].addr, TRUE);
 742             dbg_printf("\n");
 743             break;
 744         case be_xpoint_watch_read:
 745         case be_xpoint_watch_write:
 746             dbg_printf("Stopped on watchpoint %d at ", dbg_curr_thread->stopped_xpoint);
 747             print_address(addr, TRUE);
 748             dbg_printf(" values: old=%lu new=%lu\n",
 749                        oldval, dbg_curr_process->bp[dbg_curr_thread->stopped_xpoint].w.oldval);
 750         }
 751         return FALSE;
 752     }
 753
 754     /*
 755      * If our mode indicates that we are stepping line numbers,
 756      * get the current function, and figure out if we are exactly
 757      * on a line number or not.
 758      */
 759     if (mode == dbg_exec_step_over_line || mode == dbg_exec_step_into_line)
 760     {
 761         if (symbol_get_function_line_status(addr) == dbg_on_a_line_number)
 762             dbg_curr_thread->exec_count--;
 763     }
 764     else if (mode == dbg_exec_step_over_insn || mode == dbg_exec_step_into_insn)
 765         dbg_curr_thread->exec_count--;
 766
 767     if (dbg_curr_thread->exec_count > 0 || mode == dbg_exec_finish)
 768     {
 769         /*
 770          * We still need to execute more instructions.
 771          */
 772         return TRUE;
 773     }
 774
 775     /* no breakpoint, continue if in continuous mode */
 776     return mode == dbg_exec_cont || mode == dbg_exec_finish;
 777 }
 778
 779 /***********************************************************************
 780  *           break_ajust_pc
 781  *
 782  * Adjust PC to the address where the trap (if any) actually occured
 783  * Also sets dbg_curr_thread->stopped_xpoint
 784  */
 785 void break_adjust_pc(ADDRESS64* addr, DWORD code, BOOL* is_break)
 786 {
 787     DWORD               oldval = 0;
 788
 789     *is_break = FALSE;
 790
 791     /* If not single-stepping, back up to the break instruction */
 792     if (code == EXCEPTION_BREAKPOINT)
 793         addr->Offset += be_cpu->adjust_pc_for_break(&dbg_context, TRUE);
 794
 795     dbg_curr_thread->stopped_xpoint = find_xpoint(addr, be_xpoint_break);
 796     dbg_curr_process->bp[0].enabled = FALSE;  /* disable the step-over breakpoint */
 797
 798     if (dbg_curr_thread->stopped_xpoint > 0) return;
 799
 800     if (dbg_curr_thread->stopped_xpoint < 0)
 801     {
 802         dbg_curr_thread->stopped_xpoint = find_xpoint(addr, be_xpoint_watch_exec);
 803         if (dbg_curr_thread->stopped_xpoint < 0)
 804             dbg_curr_thread->stopped_xpoint = find_triggered_watch(&oldval);
 805         if (dbg_curr_thread->stopped_xpoint > 0)
 806         {
 807             /* If not single-stepping, do not back up over the break instruction */
 808             if (code == EXCEPTION_BREAKPOINT)
 809                 addr->Offset += be_cpu->adjust_pc_for_break(&dbg_context, FALSE);
 810             return;
 811         }
 812     }
 813
 814     /* If there's no breakpoint and we are not single-stepping, then
 815      * either we must have encountered a break insn in the Windows program
 816      * or someone is trying to stop us
 817      */
 818     if (dbg_curr_thread->stopped_xpoint == -1 && code == EXCEPTION_BREAKPOINT)
 819     {
 820         *is_break = TRUE;
 821         addr->Offset += be_cpu->adjust_pc_for_break(&dbg_context, FALSE);
 822     }
 823 }
 824
 825 /***********************************************************************
 826  *           break_suspend_execution
 827  *
 828  * Remove all bp before entering the debug loop
 829  */
 830 void    break_suspend_execution(void)
 831 {
 832     break_set_xpoints(FALSE);
 833     dbg_curr_process->bp[0] = dbg_curr_thread->step_over_bp;
 834 }
 835
 836 /***********************************************************************
 837  *           break_restart_execution
 838  *
 839  * Set the bp to the correct state to restart execution
 840  * in the given mode.
 841  */
 842 void break_restart_execution(int count)
 843 {
 844     ADDRESS64                   addr;
 845     enum dbg_line_status        status;
 846     enum dbg_exec_mode          mode, ret_mode;
 847     ADDRESS64                   callee;
 848     void*                       linear;
 849
 850     memory_get_current_pc(&addr);
 851     linear = memory_to_linear_addr(&addr);
 852
 853     /*
 854      * This is the mode we will be running in after we finish.  We would like
 855      * to be able to modify this in certain cases.
 856      */
 857     ret_mode = mode = dbg_curr_thread->exec_mode;
 858
 859     /* we've stopped on a xpoint (other than step over) */
 860     if (dbg_curr_thread->stopped_xpoint > 0)
 861     {
 862         /*
 863          * If we have set a new value, then save it in the BP number.
 864          */
 865         if (count != 0 && mode == dbg_exec_cont)
 866         {
 867             dbg_curr_process->bp[dbg_curr_thread->stopped_xpoint].skipcount = count;
 868         }
 869         /* If we've stopped on a breakpoint, single step over it (, then run) */
 870         if (is_xpoint_break(dbg_curr_thread->stopped_xpoint))
 871             mode = dbg_exec_step_into_insn;
 872     }
 873     else if (mode == dbg_exec_cont && count > 1)
 874     {
 875         dbg_printf("Not stopped at any breakpoint; argument ignored.\n");
 876     }
 877
 878     if (mode == dbg_exec_finish && be_cpu->is_function_return(linear))
 879     {
 880         mode = ret_mode = dbg_exec_step_into_insn;
 881     }
 882
 883     /*
 884      * See if the function we are stepping into has debug info
 885      * and line numbers.  If not, then we step over it instead.
 886      * FIXME - we need to check for things like thunks or trampolines,
 887      * as the actual function may in fact have debug info.
 888      */
 889     if (be_cpu->is_function_call(linear, &callee))
 890     {
 891         status = symbol_get_function_line_status(&callee);
 892 #if 0
 893         /* FIXME: we need to get the thunk type */
 894         /*
 895          * Anytime we have a trampoline, step over it.
 896          */
 897         if ((mode == EXEC_STEP_OVER || mode == EXEC_STEPI_OVER)
 898             && status == dbg_in_a_thunk)
 899         {
 900             WINE_WARN("Not stepping into trampoline at %p (no lines)\n",
 901                       memory_to_linear_addr(&callee));
 902             mode = EXEC_STEP_OVER_TRAMPOLINE;
 903         }
 904 #endif
 905         if (mode == dbg_exec_step_into_line && status == dbg_no_line_info)
 906         {
 907             WINE_WARN("Not stepping into function at %p (no lines)\n",
 908                       memory_to_linear_addr(&callee));
 909             mode = dbg_exec_step_over_line;
 910         }
 911     }
 912
 913     if (mode == dbg_exec_step_into_line &&
 914         symbol_get_function_line_status(&addr) == dbg_no_line_info)
 915     {
 916         dbg_printf("Single stepping until exit from function, \n"
 917                    "which has no line number information.\n");
 918         ret_mode = mode = dbg_exec_finish;
 919     }
 920
 921     switch (mode)
 922     {
 923     case dbg_exec_cont: /* Continuous execution */
 924         be_cpu->single_step(&dbg_context, FALSE);
 925         break_set_xpoints(TRUE);
 926         break;
 927
 928 #if 0
 929     case EXEC_STEP_OVER_TRAMPOLINE:
 930         /*
 931          * This is the means by which we step over our conversion stubs
 932          * in callfrom*.s and callto*.s.  We dig the appropriate address
 933          * off the stack, and we set the breakpoint there instead of the
 934          * address just after the call.
 935          */
 936         be_cpu->get_addr(dbg_curr_thread->handle, &dbg_context,
 937                          be_cpu_addr_stack, &addr);
 938         /* FIXME: we assume stack grows as on an i386 */
 939         addr.Offset += 2 * sizeof(unsigned int);
 940         dbg_read_memory(memory_to_linear_addr(&addr),
 941                         &addr.Offset, sizeof(addr.Offset));
 942         dbg_curr_process->bp[0].addr = addr;
 943         dbg_curr_process->bp[0].enabled = TRUE;
 944         dbg_curr_process->bp[0].refcount = 1;
 945         dbg_curr_process->bp[0].skipcount = 0;
 946         dbg_curr_process->bp[0].xpoint_type = be_xpoint_break;
 947         dbg_curr_process->bp[0].condition = NULL;
 948         be_cpu->single_step(&dbg_context, FALSE);
 949         break_set_xpoints(TRUE);
 950         break;
 951 #endif
 952
 953     case dbg_exec_finish:
 954     case dbg_exec_step_over_insn:  /* Stepping over a call */
 955     case dbg_exec_step_over_line:  /* Stepping over a call */
 956         if (be_cpu->is_step_over_insn(linear))
 957         {
 958             be_cpu->disasm_one_insn(&addr, FALSE);
 959             dbg_curr_process->bp[0].addr = addr;
 960             dbg_curr_process->bp[0].enabled = TRUE;
 961             dbg_curr_process->bp[0].refcount = 1;
 962             dbg_curr_process->bp[0].skipcount = 0;
 963             dbg_curr_process->bp[0].xpoint_type = be_xpoint_break;
 964             dbg_curr_process->bp[0].condition = NULL;
 965             be_cpu->single_step(&dbg_context, FALSE);
 966             break_set_xpoints(TRUE);
 967             break;
 968         }
 969         /* else fall through to single-stepping */
 970
 971     case dbg_exec_step_into_line: /* Single-stepping a line */
 972     case dbg_exec_step_into_insn: /* Single-stepping an instruction */
 973         be_cpu->single_step(&dbg_context, TRUE);
 974         break;
 975     default: RaiseException(DEBUG_STATUS_INTERNAL_ERROR, 0, 0, NULL);
 976     }
 977     dbg_curr_thread->step_over_bp = dbg_curr_process->bp[0];
 978     dbg_curr_thread->exec_mode = ret_mode;
 979 }
 980
 981 int break_add_condition(int num, struct expr* exp)
 982 {
 983     if (num <= 0 || num >= dbg_curr_process->next_bp ||
 984         !dbg_curr_process->bp[num].refcount)
 985     {
 986         dbg_printf("Invalid breakpoint number %d\n", num);
 987         return FALSE;
 988     }
 989
 990     if (dbg_curr_process->bp[num].condition != NULL)
 991     {
 992         expr_free(dbg_curr_process->bp[num].condition);
 993         dbg_curr_process->bp[num].condition = NULL;
 994     }
 995
 996     if (exp != NULL) dbg_curr_process->bp[num].condition = expr_clone(exp, NULL);
 997
 998     return TRUE;
 999 }