debugger/winedbg.c

   1 /* -*- tab-width: 8; c-basic-offset: 4 -*- */
   2
   3 /* Wine internal debugger
   4  * Interface to Windows debugger API
   5  * Copyright 2000 Eric Pouech
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library 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 GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include <stdlib.h>
  23 #include <stdarg.h>
  24 #include <stdio.h>
  25 #include <string.h>
  26 #include "debugger.h"
  27
  28 #include "ntddk.h"
  29 #include "thread.h"
  30 #include "wincon.h"
  31 #include "winreg.h"
  32 #include "wingdi.h"
  33 #include "winuser.h"
  34 #include "msvcrt/excpt.h"
  35 #include "wine/library.h"
  36
  37 DBG_PROCESS*    DEBUG_CurrProcess = NULL;
  38 DBG_THREAD*     DEBUG_CurrThread = NULL;
  39 DWORD           DEBUG_CurrTid;
  40 DWORD           DEBUG_CurrPid;
  41 CONTEXT         DEBUG_context;
  42 BOOL            DEBUG_interactiveP = FALSE;
  43 enum exit_mode  DEBUG_ExitMode = EXIT_CONTINUE;
  44 int             curr_frame = 0;
  45 int automatic_mode = 0;
  46 static char*    DEBUG_LastCmdLine = NULL;
  47
  48 static DBG_PROCESS* DEBUG_ProcessList = NULL;
  49 DBG_INTVAR DEBUG_IntVars[DBG_IV_LAST];
  50
  51 void    DEBUG_OutputA(int chn, const char* buffer, int len)
  52 {
  53     if (DBG_IVAR(ConChannelMask) & chn)
  54         WriteFile(GetStdHandle(STD_OUTPUT_HANDLE), buffer, len, NULL, NULL);
  55     if (DBG_IVAR(StdChannelMask) & chn)
  56         fwrite(buffer, len, 1, stderr);
  57 }
  58
  59 void    DEBUG_OutputW(int chn, const WCHAR* buffer, int len)
  60 {
  61     /* FIXME: this won't work is std output isn't attached to a console */
  62     if (DBG_IVAR(ConChannelMask) & chn)
  63         WriteConsoleW(GetStdHandle(STD_OUTPUT_HANDLE), buffer, len, NULL, NULL);
  64     /* simplistic Unicode to ANSI conversion */
  65     if (DBG_IVAR(StdChannelMask) & chn)
  66         while (len--) fputc((char)*buffer++, stderr);
  67 }
  68
  69 int     DEBUG_Printf(int chn, const char* format, ...)
  70 {
  71 static    char  buf[4*1024];
  72     va_list     valist;
  73     int         len;
  74
  75     va_start(valist, format);
  76     len = vsnprintf(buf, sizeof(buf), format, valist);
  77     va_end(valist);
  78
  79     if (len <= -1 || len >= sizeof(buf)) {
  80         len = sizeof(buf) - 1;
  81         buf[len] = 0;
  82         buf[len - 1] = buf[len - 2] = buf[len - 3] = '.';
  83     }
  84     DEBUG_OutputA(chn, buf, len);
  85     return len;
  86 }
  87
  88 static  BOOL DEBUG_IntVarsRW(int read)
  89 {
  90     HKEY        hkey;
  91     DWORD       type = REG_DWORD;
  92     DWORD       val;
  93     DWORD       count = sizeof(val);
  94     int         i;
  95     DBG_INTVAR* div = DEBUG_IntVars;
  96
  97     if (read) {
  98 /* initializes internal vars table */
  99 #define  INTERNAL_VAR(_var,_val,_ref,_typ)                      \
 100         div->val = _val; div->name = #_var; div->pval = _ref;   \
 101         div->type = DEBUG_GetBasicType(_typ); div++;
 102 #include "intvar.h"
 103 #undef   INTERNAL_VAR
 104     }
 105
 106     if (RegCreateKeyA(HKEY_CURRENT_USER, "Software\\Wine\\WineDbg", &hkey)) {
 107         /* since the IVars are not yet setup, DEBUG_Printf doesn't work,
 108          * so don't use it */
 109         fprintf(stderr, "Cannot create WineDbg key in registry\n");
 110         return FALSE;
 111     }
 112
 113     for (i = 0; i < DBG_IV_LAST; i++) {
 114         if (read) {
 115             if (!DEBUG_IntVars[i].pval) {
 116                 if (!RegQueryValueEx(hkey, DEBUG_IntVars[i].name, 0,
 117                                      &type, (LPSTR)&val, &count))
 118                     DEBUG_IntVars[i].val = val;
 119                 DEBUG_IntVars[i].pval = &DEBUG_IntVars[i].val;
 120             } else {
 121                 *DEBUG_IntVars[i].pval = 0;
 122             }
 123         } else {
 124             /* FIXME: type should be infered from basic type -if any- of intvar */
 125             if (DEBUG_IntVars[i].pval == &DEBUG_IntVars[i].val)
 126                 RegSetValueEx(hkey, DEBUG_IntVars[i].name, 0,
 127                               type, (LPCVOID)DEBUG_IntVars[i].pval, count);
 128         }
 129     }
 130     RegCloseKey(hkey);
 131     return TRUE;
 132 }
 133
 134 DBG_INTVAR*     DEBUG_GetIntVar(const char* name)
 135 {
 136     int         i;
 137
 138     for (i = 0; i < DBG_IV_LAST; i++) {
 139         if (!strcmp(DEBUG_IntVars[i].name, name))
 140             return &DEBUG_IntVars[i];
 141     }
 142     return NULL;
 143 }
 144
 145 static WINE_EXCEPTION_FILTER(wine_dbg)
 146 {
 147     DEBUG_Printf(DBG_CHN_MESG, "\nwine_dbg: Exception (%lx) inside debugger, continuing...\n", GetExceptionCode());
 148     DEBUG_ExternalDebugger();
 149     return EXCEPTION_EXECUTE_HANDLER;
 150 }
 151
 152 DBG_PROCESS*    DEBUG_GetProcess(DWORD pid)
 153 {
 154     DBG_PROCESS*        p;
 155
 156     for (p = DEBUG_ProcessList; p; p = p->next)
 157         if (p->pid == pid) break;
 158     return p;
 159 }
 160
 161 static  DBG_PROCESS*    DEBUG_AddProcess(DWORD pid, HANDLE h, const char* imageName)
 162 {
 163     DBG_PROCESS*        p = DBG_alloc(sizeof(DBG_PROCESS));
 164     if (!p)
 165         return NULL;
 166     p->handle = h;
 167     p->pid = pid;
 168     p->imageName = imageName ? DBG_strdup(imageName) : NULL;
 169     p->threads = NULL;
 170     p->num_threads = 0;
 171     p->continue_on_first_exception = FALSE;
 172     p->modules = NULL;
 173     p->num_modules = 0;
 174     p->next_index = 0;
 175     p->dbg_hdr_addr = 0;
 176     p->delayed_bp = NULL;
 177     p->num_delayed_bp = 0;
 178
 179     p->next = DEBUG_ProcessList;
 180     p->prev = NULL;
 181     if (DEBUG_ProcessList) DEBUG_ProcessList->prev = p;
 182     DEBUG_ProcessList = p;
 183     return p;
 184 }
 185
 186 static  void                    DEBUG_DelThread(DBG_THREAD* p);
 187
 188 static  void                    DEBUG_DelProcess(DBG_PROCESS* p)
 189 {
 190     int i;
 191
 192     if (p->threads != NULL) {
 193         DEBUG_Printf(DBG_CHN_ERR, "Shouldn't happen\n");
 194         while (p->threads) DEBUG_DelThread(p->threads);
 195     }
 196     for (i = 0; i < p->num_delayed_bp; i++) {
 197         DBG_free(p->delayed_bp[i].name);
 198     }
 199     DBG_free(p->delayed_bp);
 200     if (p->prev) p->prev->next = p->next;
 201     if (p->next) p->next->prev = p->prev;
 202     if (p == DEBUG_ProcessList) DEBUG_ProcessList = p->next;
 203     if (p == DEBUG_CurrProcess) DEBUG_CurrProcess = NULL;
 204     DBG_free((char*)p->imageName);
 205     DBG_free(p);
 206 }
 207
 208 static  void                    DEBUG_InitCurrProcess(void)
 209 {
 210 }
 211
 212 static BOOL DEBUG_ProcessGetString(char* buffer, int size, HANDLE hp, LPSTR addr)
 213 {
 214     DWORD sz;
 215     *(WCHAR*)buffer = 0;
 216     return (addr && ReadProcessMemory(hp, addr, buffer, size, &sz));
 217 }
 218
 219 static BOOL DEBUG_ProcessGetStringIndirect(char* buffer, int size, HANDLE hp, LPVOID addr)
 220 {
 221     LPVOID      ad;
 222     DWORD       sz;
 223
 224     if (   addr
 225         && ReadProcessMemory(hp, addr, &ad, sizeof(ad), &sz)
 226         && sz == sizeof(ad)
 227         && ad
 228         && ReadProcessMemory(hp, ad, buffer, size, &sz))
 229         return TRUE;
 230     *(WCHAR*)buffer = 0;
 231     return FALSE;
 232 }
 233
 234 DBG_THREAD*     DEBUG_GetThread(DBG_PROCESS* p, DWORD tid)
 235 {
 236     DBG_THREAD* t;
 237
 238     for (t = p->threads; t; t = t->next)
 239         if (t->tid == tid) break;
 240     return t;
 241 }
 242
 243 static  DBG_THREAD*     DEBUG_AddThread(DBG_PROCESS* p, DWORD tid,
 244                                         HANDLE h, LPVOID start, LPVOID teb)
 245 {
 246     DBG_THREAD* t = DBG_alloc(sizeof(DBG_THREAD));
 247     if (!t)
 248         return NULL;
 249
 250     t->handle = h;
 251     t->tid = tid;
 252     t->start = start;
 253     t->teb = teb;
 254     t->process = p;
 255     t->wait_for_first_exception = 0;
 256     t->exec_mode = EXEC_CONT;
 257     t->exec_count = 0;
 258
 259     sprintf(t->name, "%08lx", tid);
 260
 261     p->num_threads++;
 262     t->next = p->threads;
 263     t->prev = NULL;
 264     if (p->threads) p->threads->prev = t;
 265     p->threads = t;
 266
 267     return t;
 268 }
 269
 270 static  void                    DEBUG_InitCurrThread(void)
 271 {
 272     if (DEBUG_CurrThread->start) {
 273         if (DEBUG_CurrThread->process->num_threads == 1 ||
 274             DBG_IVAR(BreakAllThreadsStartup)) {
 275             DBG_VALUE   value;
 276
 277             DEBUG_SetBreakpoints(FALSE);
 278             value.type = NULL;
 279             value.cookie = DV_TARGET;
 280             value.addr.seg = 0;
 281             value.addr.off = (DWORD)DEBUG_CurrThread->start;
 282             DEBUG_AddBreakpoint(&value, NULL);
 283             DEBUG_SetBreakpoints(TRUE);
 284         }
 285     } else {
 286         DEBUG_CurrThread->wait_for_first_exception = 1;
 287     }
 288 }
 289
 290 static  void                    DEBUG_DelThread(DBG_THREAD* t)
 291 {
 292     if (t->prev) t->prev->next = t->next;
 293     if (t->next) t->next->prev = t->prev;
 294     if (t == t->process->threads) t->process->threads = t->next;
 295     t->process->num_threads--;
 296     if (t == DEBUG_CurrThread) DEBUG_CurrThread = NULL;
 297     DBG_free(t);
 298 }
 299
 300 BOOL                            DEBUG_Attach(DWORD pid, BOOL cofe)
 301 {
 302     if (!(DEBUG_CurrProcess = DEBUG_AddProcess(pid, 0, NULL))) return FALSE;
 303
 304     if (!DebugActiveProcess(pid)) {
 305         DEBUG_Printf(DBG_CHN_MESG, "Can't attach process %lx: error %ld\n", pid, GetLastError());
 306         DEBUG_DelProcess(DEBUG_CurrProcess);
 307         DEBUG_CurrProcess = NULL;
 308         return FALSE;
 309     }
 310     DEBUG_CurrProcess->continue_on_first_exception = cofe;
 311     return TRUE;
 312 }
 313
 314 BOOL                            DEBUG_Detach(void)
 315 {
 316     /* remove all set breakpoints in debuggee code */
 317     DEBUG_SetBreakpoints(FALSE);
 318     /* needed for single stepping (ugly).
 319      * should this be handled inside the server ??? */
 320 #ifdef __i386__
 321     DEBUG_context.EFlags &= ~STEP_FLAG;
 322 #endif
 323     SetThreadContext(DEBUG_CurrThread->handle, &DEBUG_context);
 324     DebugActiveProcessStop(DEBUG_CurrProcess->pid);
 325     DEBUG_DelProcess(DEBUG_CurrProcess);
 326     DEBUG_CurrProcess = NULL;
 327     /* FIXME: should zero out the symbol table too */
 328     return TRUE;
 329 }
 330
 331 static  BOOL    DEBUG_ExceptionProlog(BOOL is_debug, BOOL force, DWORD code)
 332 {
 333     DBG_ADDR    addr;
 334     int         newmode;
 335
 336     DEBUG_GetCurrentAddress(&addr);
 337     DEBUG_SuspendExecution();
 338
 339     if (!is_debug) {
 340         if (!addr.seg)
 341             DEBUG_Printf(DBG_CHN_MESG, " in 32-bit code (0x%08lx)", addr.off);
 342         else
 343             switch(DEBUG_GetSelectorType(addr.seg))
 344             {
 345             case MODE_32:
 346                 DEBUG_Printf(DBG_CHN_MESG, " in 32-bit code (%04lx:%08lx)", addr.seg, addr.off);
 347                 break;
 348             case MODE_16:
 349                 DEBUG_Printf(DBG_CHN_MESG, " in 16-bit code (%04lx:%04lx)", addr.seg, addr.off);
 350                 break;
 351             case MODE_VM86:
 352                 DEBUG_Printf(DBG_CHN_MESG, " in vm86 code (%04lx:%04lx)", addr.seg, addr.off);
 353                 break;
 354             case MODE_INVALID:
 355                 DEBUG_Printf(DBG_CHN_MESG, " bad CS (%lx)", addr.seg);
 356                 break;
 357         }
 358         DEBUG_Printf(DBG_CHN_MESG, ".\n");
 359     }
 360
 361     DEBUG_LoadEntryPoints("Loading new modules symbols:\n");
 362
 363     if (!force && is_debug &&
 364         DEBUG_ShouldContinue(&addr, code,
 365                              &DEBUG_CurrThread->exec_count))
 366         return FALSE;
 367
 368     if ((newmode = DEBUG_GetSelectorType(addr.seg)) == MODE_INVALID) newmode = MODE_32;
 369     if (newmode != DEBUG_CurrThread->dbg_mode)
 370     {
 371         static const char * const names[] = { "???", "16-bit", "32-bit", "vm86" };
 372         DEBUG_Printf(DBG_CHN_MESG,"In %s mode.\n", names[newmode] );
 373         DEBUG_CurrThread->dbg_mode = newmode;
 374     }
 375
 376     DEBUG_DoDisplay();
 377
 378     if (is_debug || force) {
 379         /*
 380          * Do a quiet backtrace so that we have an idea of what the situation
 381          * is WRT the source files.
 382          */
 383         DEBUG_BackTrace(DEBUG_CurrTid, FALSE);
 384     } else {
 385         /* This is a real crash, dump some info */
 386         DEBUG_InfoRegisters();
 387         DEBUG_InfoStack();
 388 #ifdef __i386__
 389         if (DEBUG_CurrThread->dbg_mode == MODE_16) {
 390             DEBUG_InfoSegments(DEBUG_context.SegDs >> 3, 1);
 391             if (DEBUG_context.SegEs != DEBUG_context.SegDs)
 392                 DEBUG_InfoSegments(DEBUG_context.SegEs >> 3, 1);
 393         }
 394         DEBUG_InfoSegments(DEBUG_context.SegFs >> 3, 1);
 395 #endif
 396         DEBUG_BackTrace(DEBUG_CurrTid, TRUE);
 397     }
 398
 399     if (!is_debug ||
 400         (DEBUG_CurrThread->exec_mode == EXEC_STEPI_OVER) ||
 401         (DEBUG_CurrThread->exec_mode == EXEC_STEPI_INSTR)) {
 402
 403         struct list_id list;
 404
 405         /* Show where we crashed */
 406         curr_frame = 0;
 407         DEBUG_DisassembleInstruction(&addr);
 408
 409         /* resets list internal arguments so we can look at source code when needed */
 410         DEBUG_FindNearestSymbol(&addr, TRUE, NULL, 0, &list);
 411         if (list.sourcefile) DEBUG_List(&list, NULL, 0);
 412     }
 413     return TRUE;
 414 }
 415
 416 static  void    DEBUG_ExceptionEpilog(void)
 417 {
 418     DEBUG_RestartExecution(DEBUG_CurrThread->exec_count);
 419     /*
 420      * This will have gotten absorbed into the breakpoint info
 421      * if it was used.  Otherwise it would have been ignored.
 422      * In any case, we don't mess with it any more.
 423      */
 424     if (DEBUG_CurrThread->exec_mode == EXEC_CONT)
 425         DEBUG_CurrThread->exec_count = 0;
 426 }
 427
 428 static  void DEBUG_HandleException(EXCEPTION_RECORD *rec, BOOL first_chance, BOOL force)
 429 {
 430     BOOL             is_debug = FALSE;
 431     THREADNAME_INFO *pThreadName;
 432     DBG_THREAD      *pThread;
 433
 434     assert(DEBUG_CurrThread);
 435
 436     DEBUG_ExitMode = EXIT_CONTINUE;
 437
 438     switch (rec->ExceptionCode)
 439     {
 440     case EXCEPTION_BREAKPOINT:
 441     case EXCEPTION_SINGLE_STEP:
 442         is_debug = TRUE;
 443         break;
 444     case EXCEPTION_NAME_THREAD:
 445         pThreadName = (THREADNAME_INFO*)(rec->ExceptionInformation);
 446         if (pThreadName->dwThreadID == -1)
 447             pThread = DEBUG_CurrThread;
 448         else
 449             pThread = DEBUG_GetThread(DEBUG_CurrProcess, pThreadName->dwThreadID);
 450
 451         if (ReadProcessMemory(DEBUG_CurrThread->process->handle, pThreadName->szName,
 452                               pThread->name, 9, NULL))
 453             DEBUG_Printf (DBG_CHN_MESG,
 454                           "Thread ID=0x%lx renamed using MS VC6 extension (name==\"%s\")\n",
 455                           pThread->tid, pThread->name);
 456         return;
 457     }
 458
 459     if (first_chance && !is_debug && !force && !DBG_IVAR(BreakOnFirstChance))
 460     {
 461         /* pass exception to program except for debug exceptions */
 462         if (!is_debug) DEBUG_ExitMode = EXIT_PASS;
 463         return;
 464     }
 465
 466     if (!is_debug)
 467     {
 468         /* print some infos */
 469         DEBUG_Printf(DBG_CHN_MESG, "%s: ",
 470                       first_chance ? "First chance exception" : "Unhandled exception");
 471         switch (rec->ExceptionCode)
 472         {
 473         case EXCEPTION_INT_DIVIDE_BY_ZERO:
 474             DEBUG_Printf(DBG_CHN_MESG, "divide by zero");
 475             break;
 476         case EXCEPTION_INT_OVERFLOW:
 477             DEBUG_Printf(DBG_CHN_MESG, "overflow");
 478             break;
 479         case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
 480             DEBUG_Printf(DBG_CHN_MESG, "array bounds ");
 481             break;
 482         case EXCEPTION_ILLEGAL_INSTRUCTION:
 483             DEBUG_Printf(DBG_CHN_MESG, "illegal instruction");
 484             break;
 485         case EXCEPTION_STACK_OVERFLOW:
 486             DEBUG_Printf(DBG_CHN_MESG, "stack overflow");
 487             break;
 488         case EXCEPTION_PRIV_INSTRUCTION:
 489             DEBUG_Printf(DBG_CHN_MESG, "privileged instruction");
 490             break;
 491         case EXCEPTION_ACCESS_VIOLATION:
 492             if (rec->NumberParameters == 2)
 493                 DEBUG_Printf(DBG_CHN_MESG, "page fault on %s access to 0x%08lx",
 494                               rec->ExceptionInformation[0] ? "write" : "read",
 495                               rec->ExceptionInformation[1]);
 496             else
 497                 DEBUG_Printf(DBG_CHN_MESG, "page fault");
 498             break;
 499         case EXCEPTION_DATATYPE_MISALIGNMENT:
 500             DEBUG_Printf(DBG_CHN_MESG, "Alignment");
 501             break;
 502         case DBG_CONTROL_C:
 503             DEBUG_Printf(DBG_CHN_MESG, "^C");
 504             break;
 505         case CONTROL_C_EXIT:
 506             DEBUG_Printf(DBG_CHN_MESG, "^C");
 507             break;
 508         case EXCEPTION_CRITICAL_SECTION_WAIT:
 509             {
 510                 DBG_ADDR        addr;
 511
 512                 addr.seg = 0;
 513                 addr.off = rec->ExceptionInformation[0];
 514
 515                 DEBUG_Printf(DBG_CHN_MESG, "wait failed on critical section ");
 516                 DEBUG_PrintAddress(&addr, DEBUG_CurrThread->dbg_mode, FALSE);
 517             }
 518             if (!DBG_IVAR(BreakOnCritSectTimeOut))
 519             {
 520                 DEBUG_Printf(DBG_CHN_MESG, "\n");
 521                 return;
 522             }
 523             break;
 524         case EXCEPTION_WINE_STUB:
 525             {
 526                 char dll[32], name[64];
 527                 DEBUG_ProcessGetString( dll, sizeof(dll), DEBUG_CurrThread->process->handle,
 528                                         (char *)rec->ExceptionInformation[0] );
 529                 DEBUG_ProcessGetString( name, sizeof(name), DEBUG_CurrThread->process->handle,
 530                                         (char *)rec->ExceptionInformation[1] );
 531                 DEBUG_Printf(DBG_CHN_MESG, "unimplemented function %s.%s called", dll, name );
 532             }
 533             break;
 534         case EXCEPTION_VM86_INTx:
 535             DEBUG_Printf(DBG_CHN_MESG, "interrupt %02lx in vm86 mode",
 536                          rec->ExceptionInformation[0]);
 537             break;
 538         case EXCEPTION_VM86_STI:
 539             DEBUG_Printf(DBG_CHN_MESG, "sti in vm86 mode");
 540             break;
 541         case EXCEPTION_VM86_PICRETURN:
 542             DEBUG_Printf(DBG_CHN_MESG, "PIC return in vm86 mode");
 543             break;
 544         default:
 545             DEBUG_Printf(DBG_CHN_MESG, "%08lx", rec->ExceptionCode);
 546             break;
 547         }
 548     }
 549
 550 #if 0
 551     DEBUG_Printf(DBG_CHN_TRACE,
 552                  "Entering debugger     PC=%lx EFL=%08lx mode=%d count=%d\n",
 553 #ifdef __i386__
 554                  DEBUG_context.Eip, DEBUG_context.EFlags,
 555 #else
 556                  0L, 0L,
 557 #endif
 558                  DEBUG_CurrThread->exec_mode, DEBUG_CurrThread->exec_count);
 559 #endif
 560
 561     if (automatic_mode)
 562     {
 563         DEBUG_ExceptionProlog(is_debug, FALSE, rec->ExceptionCode);
 564         DEBUG_ExitMode = EXIT_QUIT;
 565         return;  /* terminate execution */
 566     }
 567
 568     if (DEBUG_ExceptionProlog(is_debug, force, rec->ExceptionCode)) {
 569         DEBUG_interactiveP = TRUE;
 570         for (;;)
 571         {
 572             DEBUG_Parser();
 573             if (DEBUG_ExitMode == EXIT_QUIT || DEBUG_ExitMode == EXIT_DETACH)
 574                 break;
 575             if (DEBUG_ValidateRegisters()) {
 576                 if (DEBUG_ExitMode == EXIT_CONTINUE || first_chance)
 577                     break;
 578                 DEBUG_Printf(DBG_CHN_MESG, "Cannot pass on last chance exception. You must use cont\n");
 579             }
 580         }
 581         DEBUG_interactiveP = FALSE;
 582     }
 583     DEBUG_ExceptionEpilog();
 584
 585 #if 0
 586     DEBUG_Printf(DBG_CHN_TRACE,
 587                  "Exiting debugger      PC=%lx EFL=%08lx mode=%d count=%d\n",
 588 #ifdef __i386__
 589                  DEBUG_context.Eip, DEBUG_context.EFlags,
 590 #else
 591                  0L, 0L,
 592 #endif
 593                  DEBUG_CurrThread->exec_mode, DEBUG_CurrThread->exec_count);
 594 #endif
 595 }
 596
 597 static  void    DEBUG_HandleDebugEvent(DEBUG_EVENT* de)
 598 {
 599     char                buffer[256];
 600
 601     DEBUG_CurrPid = de->dwProcessId;
 602     DEBUG_CurrTid = de->dwThreadId;
 603
 604     DEBUG_ExitMode = EXIT_CONTINUE;
 605     __TRY {
 606         if ((DEBUG_CurrProcess = DEBUG_GetProcess(de->dwProcessId)) != NULL)
 607             DEBUG_CurrThread = DEBUG_GetThread(DEBUG_CurrProcess, de->dwThreadId);
 608         else
 609             DEBUG_CurrThread = NULL;
 610
 611         switch (de->dwDebugEventCode) {
 612         case EXCEPTION_DEBUG_EVENT:
 613             if (!DEBUG_CurrThread) {
 614                 DEBUG_Printf(DBG_CHN_ERR, "%08lx:%08lx: not a registered process or thread (perhaps a 16 bit one ?)\n",
 615                              de->dwProcessId, de->dwThreadId);
 616                 break;
 617             }
 618
 619             DEBUG_Printf(DBG_CHN_TRACE, "%08lx:%08lx: exception code=%08lx\n",
 620                          de->dwProcessId, de->dwThreadId,
 621                          de->u.Exception.ExceptionRecord.ExceptionCode);
 622
 623             if (DEBUG_CurrProcess->continue_on_first_exception) {
 624                 DEBUG_CurrProcess->continue_on_first_exception = FALSE;
 625                 if (!DBG_IVAR(BreakOnAttach)) {
 626                     break;
 627                 }
 628             }
 629
 630             DEBUG_context.ContextFlags =  CONTEXT_CONTROL
 631                                         | CONTEXT_INTEGER
 632 #ifdef CONTEXT_SEGMENTS
 633                                         | CONTEXT_SEGMENTS
 634 #endif
 635 #ifdef CONTEXT_DEBUG_REGISTERS
 636                                         | CONTEXT_DEBUG_REGISTERS
 637 #endif
 638                                         ;
 639
 640             if (!GetThreadContext(DEBUG_CurrThread->handle, &DEBUG_context)) {
 641                 DEBUG_Printf(DBG_CHN_WARN, "Can't get thread's context\n");
 642                 break;
 643             }
 644
 645             DEBUG_HandleException(&de->u.Exception.ExceptionRecord,
 646                                   de->u.Exception.dwFirstChance,
 647                                   DEBUG_CurrThread->wait_for_first_exception);
 648             if (DEBUG_CurrThread) {
 649                 DEBUG_CurrThread->wait_for_first_exception = 0;
 650                 SetThreadContext(DEBUG_CurrThread->handle, &DEBUG_context);
 651             }
 652             break;
 653
 654         case CREATE_THREAD_DEBUG_EVENT:
 655             DEBUG_Printf(DBG_CHN_TRACE, "%08lx:%08lx: create thread D @%08lx\n", de->dwProcessId, de->dwThreadId,
 656                          (unsigned long)(LPVOID)de->u.CreateThread.lpStartAddress);
 657
 658             if (DEBUG_CurrProcess == NULL) {
 659                 DEBUG_Printf(DBG_CHN_ERR, "Unknown process\n");
 660                 break;
 661             }
 662             if (DEBUG_GetThread(DEBUG_CurrProcess, de->dwThreadId) != NULL) {
 663                 DEBUG_Printf(DBG_CHN_TRACE, "Thread already listed, skipping\n");
 664                 break;
 665             }
 666
 667             DEBUG_CurrThread = DEBUG_AddThread(DEBUG_CurrProcess,
 668                                                de->dwThreadId,
 669                                                de->u.CreateThread.hThread,
 670                                                de->u.CreateThread.lpStartAddress,
 671                                                de->u.CreateThread.lpThreadLocalBase);
 672             if (!DEBUG_CurrThread) {
 673                 DEBUG_Printf(DBG_CHN_ERR, "Couldn't create thread\n");
 674                 break;
 675             }
 676             DEBUG_InitCurrThread();
 677             break;
 678
 679         case CREATE_PROCESS_DEBUG_EVENT:
 680             DEBUG_ProcessGetStringIndirect(buffer, sizeof(buffer),
 681                                            de->u.CreateProcessInfo.hProcess,
 682                                            de->u.CreateProcessInfo.lpImageName);
 683
 684             /* FIXME unicode ? de->u.CreateProcessInfo.fUnicode */
 685             DEBUG_Printf(DBG_CHN_TRACE, "%08lx:%08lx: create process '%s'/%p @%08lx (%ld<%ld>)\n",
 686                          de->dwProcessId, de->dwThreadId,
 687                          buffer, de->u.CreateProcessInfo.lpImageName,
 688                          (unsigned long)(LPVOID)de->u.CreateProcessInfo.lpStartAddress,
 689                          de->u.CreateProcessInfo.dwDebugInfoFileOffset,
 690                          de->u.CreateProcessInfo.nDebugInfoSize);
 691
 692             if ((DEBUG_CurrProcess = DEBUG_GetProcess(de->dwProcessId)) != NULL) {
 693                 if (DEBUG_CurrProcess->handle) {
 694                     DEBUG_Printf(DBG_CHN_ERR, "Skipping already defined process\n");
 695                     break;
 696                 }
 697                 DEBUG_CurrProcess->handle = de->u.CreateProcessInfo.hProcess;
 698                 if (DEBUG_CurrProcess->imageName == NULL)
 699                     DEBUG_CurrProcess->imageName = DBG_strdup(buffer[0] ? buffer : "<Debugged Process>");
 700
 701             } else {
 702                 DEBUG_CurrProcess = DEBUG_AddProcess(de->dwProcessId,
 703                                                      de->u.CreateProcessInfo.hProcess,
 704                                                      buffer[0] ? buffer : "<Debugged Process>");
 705                 if (DEBUG_CurrProcess == NULL) {
 706                     DEBUG_Printf(DBG_CHN_ERR, "Unknown process\n");
 707                     break;
 708                 }
 709             }
 710
 711             DEBUG_Printf(DBG_CHN_TRACE, "%08lx:%08lx: create thread I @%08lx\n",
 712                          de->dwProcessId, de->dwThreadId,
 713                          (unsigned long)(LPVOID)de->u.CreateProcessInfo.lpStartAddress);
 714
 715             DEBUG_CurrThread = DEBUG_AddThread(DEBUG_CurrProcess,
 716                                                de->dwThreadId,
 717                                                de->u.CreateProcessInfo.hThread,
 718                                                de->u.CreateProcessInfo.lpStartAddress,
 719                                                de->u.CreateProcessInfo.lpThreadLocalBase);
 720             if (!DEBUG_CurrThread) {
 721                 DEBUG_Printf(DBG_CHN_ERR, "Couldn't create thread\n");
 722                 break;
 723             }
 724
 725             DEBUG_InitCurrProcess();
 726             DEBUG_InitCurrThread();
 727
 728             /* module is either PE, NE or ELF module (for WineLib), but all
 729              * are loaded with wine, so load its symbols, then the main module
 730              */
 731             do
 732             {
 733                 char*   ptr = getenv("WINELOADER");
 734
 735                 if (!ptr || DEBUG_ReadExecutableDbgInfo( ptr ) == DIL_ERROR)
 736                     DEBUG_ReadExecutableDbgInfo( "wine" );
 737             } while (0);
 738
 739             DEBUG_LoadModule32(DEBUG_CurrProcess->imageName, de->u.CreateProcessInfo.hFile,
 740                                (DWORD)de->u.CreateProcessInfo.lpBaseOfImage);
 741
 742             break;
 743
 744         case EXIT_THREAD_DEBUG_EVENT:
 745             DEBUG_Printf(DBG_CHN_TRACE, "%08lx:%08lx: exit thread (%ld)\n",
 746                          de->dwProcessId, de->dwThreadId, de->u.ExitThread.dwExitCode);
 747
 748             if (DEBUG_CurrThread == NULL) {
 749                 DEBUG_Printf(DBG_CHN_ERR, "Unknown thread\n");
 750                 break;
 751             }
 752             /* FIXME: remove break point set on thread startup */
 753             DEBUG_DelThread(DEBUG_CurrThread);
 754             break;
 755
 756         case EXIT_PROCESS_DEBUG_EVENT:
 757             DEBUG_Printf(DBG_CHN_TRACE, "%08lx:%08lx: exit process (%ld)\n",
 758                          de->dwProcessId, de->dwThreadId, de->u.ExitProcess.dwExitCode);
 759
 760             if (DEBUG_CurrProcess == NULL) {
 761                 DEBUG_Printf(DBG_CHN_ERR, "Unknown process\n");
 762                 break;
 763             }
 764             /* just in case */
 765             DEBUG_SetBreakpoints(FALSE);
 766             /* kill last thread */
 767             DEBUG_DelThread(DEBUG_CurrProcess->threads);
 768             DEBUG_DelProcess(DEBUG_CurrProcess);
 769
 770             DEBUG_Printf(DBG_CHN_MESG, "Process of pid=%08lx has terminated\n", DEBUG_CurrPid);
 771             break;
 772
 773         case LOAD_DLL_DEBUG_EVENT:
 774             if (DEBUG_CurrThread == NULL) {
 775                 DEBUG_Printf(DBG_CHN_ERR, "Unknown thread\n");
 776                 break;
 777             }
 778             DEBUG_ProcessGetStringIndirect(buffer, sizeof(buffer),
 779                                            DEBUG_CurrThread->process->handle,
 780                                            de->u.LoadDll.lpImageName);
 781
 782             /* FIXME unicode: de->u.LoadDll.fUnicode */
 783             DEBUG_Printf(DBG_CHN_TRACE, "%08lx:%08lx: loads DLL %s @%08lx (%ld<%ld>)\n",
 784                          de->dwProcessId, de->dwThreadId,
 785                          buffer, (unsigned long)de->u.LoadDll.lpBaseOfDll,
 786                          de->u.LoadDll.dwDebugInfoFileOffset,
 787                          de->u.LoadDll.nDebugInfoSize);
 788             _strupr(buffer);
 789             DEBUG_LoadModule32(buffer, de->u.LoadDll.hFile, (DWORD)de->u.LoadDll.lpBaseOfDll);
 790             DEBUG_CheckDelayedBP();
 791             if (DBG_IVAR(BreakOnDllLoad)) {
 792                 DEBUG_Printf(DBG_CHN_MESG, "Stopping on DLL %s loading at %08lx\n",
 793                              buffer, (unsigned long)de->u.LoadDll.lpBaseOfDll);
 794                 DEBUG_Parser();
 795             }
 796             break;
 797
 798         case UNLOAD_DLL_DEBUG_EVENT:
 799             DEBUG_Printf(DBG_CHN_TRACE, "%08lx:%08lx: unload DLL @%08lx\n", de->dwProcessId, de->dwThreadId,
 800                          (unsigned long)de->u.UnloadDll.lpBaseOfDll);
 801             break;
 802
 803         case OUTPUT_DEBUG_STRING_EVENT:
 804             if (DEBUG_CurrThread == NULL) {
 805                 DEBUG_Printf(DBG_CHN_ERR, "Unknown thread\n");
 806                 break;
 807             }
 808
 809             DEBUG_ProcessGetString(buffer, sizeof(buffer),
 810                                    DEBUG_CurrThread->process->handle,
 811                                    de->u.DebugString.lpDebugStringData);
 812
 813             /* FIXME unicode de->u.DebugString.fUnicode ? */
 814             DEBUG_Printf(DBG_CHN_TRACE, "%08lx:%08lx: output debug string (%s)\n",
 815                          de->dwProcessId, de->dwThreadId, buffer);
 816             break;
 817
 818         case RIP_EVENT:
 819             DEBUG_Printf(DBG_CHN_TRACE, "%08lx:%08lx: rip error=%ld type=%ld\n",
 820                          de->dwProcessId, de->dwThreadId, de->u.RipInfo.dwError,
 821                          de->u.RipInfo.dwType);
 822             break;
 823
 824         default:
 825             DEBUG_Printf(DBG_CHN_TRACE, "%08lx:%08lx: unknown event (%ld)\n",
 826                          de->dwProcessId, de->dwThreadId, de->dwDebugEventCode);
 827         }
 828
 829     } __EXCEPT(wine_dbg) {
 830         DEBUG_ExitMode = EXIT_CONTINUE;
 831     }
 832     __ENDTRY;
 833 }
 834
 835 static  DWORD   DEBUG_MainLoop(void)
 836 {
 837     DEBUG_EVENT         de;
 838
 839     DEBUG_Printf(DBG_CHN_MESG, " on pid %lx\n", DEBUG_CurrPid);
 840
 841     while (DEBUG_ExitMode == EXIT_CONTINUE)
 842     {
 843         /* wait until we get at least one loaded process */
 844         while (!DEBUG_ProcessList)
 845         {
 846             DEBUG_Parser();
 847             if (DEBUG_ExitMode == EXIT_CONTINUE || DEBUG_ExitMode == EXIT_QUIT) break;
 848         }
 849         if (DEBUG_ExitMode != EXIT_CONTINUE) break;
 850
 851         while ((DEBUG_ExitMode == EXIT_CONTINUE || DEBUG_ExitMode == EXIT_PASS) &&
 852                DEBUG_ProcessList &&
 853                WaitForDebugEvent(&de, INFINITE))
 854         {
 855             DEBUG_HandleDebugEvent(&de);
 856             ContinueDebugEvent(de.dwProcessId, de.dwThreadId,
 857                                (DEBUG_ExitMode == EXIT_PASS) ? DBG_EXCEPTION_NOT_HANDLED : DBG_CONTINUE);
 858         }
 859         if (DEBUG_ExitMode == EXIT_DETACH && DEBUG_Detach())
 860         {
 861             /* DEBUG_ExitMode = EXIT_CONTINUE; */
 862             /* FIXME: as we don't have a simple way to zero out the process symbol table
 863              * we simply quit the debugger on detach...
 864              */
 865             DEBUG_ExitMode = EXIT_QUIT;
 866         }
 867     }
 868
 869     DEBUG_Printf(DBG_CHN_MESG, "WineDbg terminated on pid %lx\n", DEBUG_CurrPid);
 870
 871     return 0;
 872 }
 873
 874 static DWORD DEBUG_AutoMode(void)
 875 {
 876     DEBUG_EVENT de;
 877
 878     DEBUG_Printf(DBG_CHN_MESG, " on pid %lx\n", DEBUG_CurrPid);
 879
 880     while ((DEBUG_ExitMode == EXIT_CONTINUE || DEBUG_ExitMode == EXIT_PASS) &&
 881            DEBUG_ProcessList &&
 882            WaitForDebugEvent(&de, INFINITE))
 883     {
 884         DEBUG_HandleDebugEvent(&de);
 885         ContinueDebugEvent(de.dwProcessId, de.dwThreadId,
 886                            (DEBUG_ExitMode == EXIT_PASS) ? DBG_EXCEPTION_NOT_HANDLED : DBG_CONTINUE);
 887     }
 888     /* print some extra information */
 889     DEBUG_Printf(DBG_CHN_MESG, "Modules:\n");
 890     DEBUG_WalkModules();
 891     DEBUG_Printf(DBG_CHN_MESG, "Threads:\n");
 892     DEBUG_WalkThreads();
 893
 894     DEBUG_Printf(DBG_CHN_MESG, "WineDbg terminated on pid %lx\n", DEBUG_CurrPid);
 895     return 0;
 896 }
 897
 898 static  BOOL    DEBUG_Start(LPSTR cmdLine)
 899 {
 900     PROCESS_INFORMATION info;
 901     STARTUPINFOA        startup;
 902
 903     memset(&startup, 0, sizeof(startup));
 904     startup.cb = sizeof(startup);
 905     startup.dwFlags = STARTF_USESHOWWINDOW;
 906     startup.wShowWindow = SW_SHOWNORMAL;
 907
 908     if (!CreateProcess(NULL, cmdLine, NULL, NULL,
 909                        FALSE, DEBUG_PROCESS|DETACHED_PROCESS, NULL, NULL, &startup, &info)) {
 910         DEBUG_Printf(DBG_CHN_MESG, "Couldn't start process '%s'\n", cmdLine);
 911         return FALSE;
 912     }
 913     DEBUG_CurrPid = info.dwProcessId;
 914     if (!(DEBUG_CurrProcess = DEBUG_AddProcess(DEBUG_CurrPid, 0, NULL))) return FALSE;
 915
 916     return TRUE;
 917 }
 918
 919 void    DEBUG_Run(const char* args)
 920 {
 921     DBG_MODULE* wmod = DEBUG_GetProcessMainModule(DEBUG_CurrProcess);
 922     const char* pgm = (wmod) ? wmod->module_name : "none";
 923
 924     if (args) {
 925         DEBUG_Printf(DBG_CHN_MESG, "Run (%s) with '%s'\n", pgm, args);
 926     } else {
 927         if (!DEBUG_LastCmdLine) {
 928             DEBUG_Printf(DBG_CHN_MESG, "Cannot find previously used command line.\n");
 929             return;
 930         }
 931         DEBUG_Start(DEBUG_LastCmdLine);
 932     }
 933 }
 934
 935 static BOOL WINAPI DEBUG_CtrlCHandler(DWORD dwCtrlType)
 936 {
 937     if (dwCtrlType == CTRL_C_EVENT)
 938     {
 939         DEBUG_Printf(DBG_CHN_MESG, "Ctrl-C: stopping debuggee\n");
 940         /* FIXME: since we likely have a single process, signal the first process
 941          * in list
 942          */
 943         return DEBUG_ProcessList && DebugBreakProcess(DEBUG_ProcessList->handle);
 944     }
 945     return FALSE;
 946 }
 947
 948 static void DEBUG_InitConsole(void)
 949 {
 950     COORD       c;
 951     SMALL_RECT  sr;
 952     DWORD       mode;
 953
 954     /* keep it as a cuiexe for now, so that Wine won't touch the Unix stdin,
 955      * stdout and stderr streams
 956      */
 957     if (DBG_IVAR(UseXTerm))
 958     {
 959         FreeConsole();
 960         AllocConsole();
 961     }
 962
 963     /* this would be nicer for output */
 964     c.X = 132;
 965     c.Y = 500;
 966     SetConsoleScreenBufferSize(GetStdHandle(STD_OUTPUT_HANDLE), c);
 967
 968     /* sets the console's window width accordingly */
 969     sr.Left   = 0;
 970     sr.Top    = 0;
 971     sr.Right  = c.X - 1;
 972     sr.Bottom = 50;
 973     SetConsoleWindowInfo(GetStdHandle(STD_OUTPUT_HANDLE), TRUE, &sr);
 974
 975     /* put the line editing mode with the nice emacs features (FIXME: could be triggered by a IVAR) */
 976     if (GetConsoleMode(GetStdHandle(STD_INPUT_HANDLE), &mode))
 977         SetConsoleMode(GetStdHandle(STD_INPUT_HANDLE), mode | WINE_ENABLE_LINE_INPUT_EMACS);
 978
 979     /* set our control-C handler */
 980     SetConsoleCtrlHandler(DEBUG_CtrlCHandler, TRUE);
 981 }
 982
 983 int main(int argc, char** argv)
 984 {
 985     DWORD       retv = 0;
 986
 987     /* Initialize the type handling stuff. */
 988     DEBUG_InitTypes();
 989     DEBUG_InitCVDataTypes();
 990
 991     /* Initialize internal vars (types must have been initialized before) */
 992     if (!DEBUG_IntVarsRW(TRUE)) return -1;
 993
 994     /* parse options */
 995     while (argc > 1 && argv[1][0] == '-')
 996     {
 997         if (!strcmp( argv[1], "--auto" ))
 998         {
 999             automatic_mode = 1;
1000             /* force some internal variables */
1001             DBG_IVAR(UseXTerm) = 0;
1002             DBG_IVAR(BreakOnDllLoad) = 0;
1003             DBG_IVAR(ConChannelMask) = 0;
1004             DBG_IVAR(StdChannelMask) = DBG_CHN_MESG;
1005             argc--;
1006             argv++;
1007             continue;
1008         }
1009         if (!strcmp( argv[1], "--debugmsg" ) && argv[2])
1010         {
1011             wine_dbg_parse_options( argv[2] );
1012             argc -= 2;
1013             argv += 2;
1014             continue;
1015         }
1016         DEBUG_Printf(DBG_CHN_MESG, "Usage: winedbg [--debugmsg dbgoptions] [--auto] cmdline\n" );
1017         return 1;
1018     }
1019
1020     DEBUG_InitConsole();
1021
1022     DEBUG_Printf(DBG_CHN_MESG, "WineDbg starting... ");
1023
1024     if (argc == 3) {
1025         HANDLE  hEvent;
1026         DWORD   pid;
1027
1028         if ((pid = atoi(argv[1])) != 0 && (hEvent = (HANDLE)atoi(argv[2])) != 0) {
1029             if (!DEBUG_Attach(pid, TRUE)) {
1030                 /* don't care about result */
1031                 SetEvent(hEvent);
1032                 goto leave;
1033             }
1034             if (!SetEvent(hEvent)) {
1035                 DEBUG_Printf(DBG_CHN_ERR, "Invalid event handle: %p\n", hEvent);
1036                 goto leave;
1037             }
1038             CloseHandle(hEvent);
1039             DEBUG_CurrPid = pid;
1040         }
1041     }
1042
1043     if (DEBUG_CurrPid == 0 && argc > 1) {
1044         int     i, len;
1045         LPSTR   cmdLine;
1046
1047         if (!(cmdLine = DBG_alloc(len = 1))) goto oom_leave;
1048         cmdLine[0] = '\0';
1049
1050         for (i = 1; i < argc; i++) {
1051             len += strlen(argv[i]) + 1;
1052             if (!(cmdLine = DBG_realloc(cmdLine, len))) goto oom_leave;
1053             strcat(cmdLine, argv[i]);
1054             cmdLine[len - 2] = ' ';
1055             cmdLine[len - 1] = '\0';
1056         }
1057
1058         if (!DEBUG_Start(cmdLine)) {
1059             DEBUG_Printf(DBG_CHN_MESG, "Couldn't start process '%s'\n", cmdLine);
1060             goto leave;
1061         }
1062         DBG_free(DEBUG_LastCmdLine);
1063         DEBUG_LastCmdLine = cmdLine;
1064     }
1065
1066     if (automatic_mode)
1067     {
1068         retv = DEBUG_AutoMode();
1069         /* don't save modified variables in auto mode */
1070     }
1071     else
1072     {
1073         retv = DEBUG_MainLoop();
1074         /* saves modified variables */
1075         DEBUG_IntVarsRW(FALSE);
1076     }
1077
1078  leave:
1079     return retv;
1080
1081  oom_leave:
1082     DEBUG_Printf(DBG_CHN_MESG, "Out of memory\n");
1083     goto leave;
1084 }