winedbg.c 23.7 KB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772
/* Wine internal debugger
 * Interface to Windows debugger API
 * Copyright 2000-2004 Eric Pouech
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include "config.h"
#include "wine/port.h"

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "debugger.h"

#include "winternl.h"
#include "wine/exception.h"
#include "wine/library.h"

#include "wine/debug.h"

/* TODO list:
 *
 * - minidump
 *      + ensure that all commands work as expected in minidump reload function
 *        (and re-enable parser usage)
 * - CPU adherence
 *      + we always assume the stack grows as on i386 (i.e. downwards)
 * - UI
 *      + re-enable the limited output (depth of structure printing and number of
 *        lines)
 *      + make the output as close as possible to what gdb does
 * - symbol management:
 *      + symbol table loading is broken
 *      + in symbol_get_lvalue, we don't do any scoping (as C does) between local and
 *        global vars (we may need this to force some display for example). A solution
 *        would be always to return arrays with: local vars, global vars, thunks
 * - type management:
 *      + some bits of internal types are missing (like type casts and the address
 *        operator)
 *      + the type for an enum's value is always inferred as int (winedbg & dbghelp)
 *      + most of the code implies that sizeof(void*) = sizeof(int)
 *      + all computations should be made on long long
 *              o expr computations are in int:s
 *              o bitfield size is on a 4-bytes
 * - execution:
 *      + set a better fix for gdb (proxy mode) than the step-mode hack
 *      + implement function call in debuggee
 *      + trampoline management is broken when getting 16 <=> 32 thunk destination
 *        address
 *      + thunking of delayed imports doesn't work as expected (ie, when stepping,
 *        it currently stops at first insn with line number during the library 
 *        loading). We should identify this (__wine_delay_import) and set a
 *        breakpoint instead of single stepping the library loading.
 *      + it's wrong to copy thread->step_over_bp into process->bp[0] (when 
 *        we have a multi-thread debuggee). complete fix must include storing all
 *        thread's step-over bp in process-wide bp array, and not to handle bp
 *        when we have the wrong thread running into that bp
 *      + code in CREATE_PROCESS debug event doesn't work on Windows, as we cannot
 *        get the name of the main module this way. We should rewrite all this code
 *        and store in struct dbg_process as early as possible (before process
 *        creation or attachment), the name of the main module
 * - global:
 *      + define a better way to enable the wine extensions (either DBG SDK function
 *        in dbghelp, or TLS variable, or environment variable or ...)
 *      + audit all files to ensure that we check all potential return values from
 *        every function call to catch the errors
 *      + BTW check also whether the exception mechanism is the best way to return
 *        errors (or find a proper fix for MinGW port)
 */

WINE_DEFAULT_DEBUG_CHANNEL(winedbg);

struct dbg_process*	dbg_curr_process = NULL;
struct dbg_thread*	dbg_curr_thread = NULL;
DWORD_PTR	        dbg_curr_tid = 0;
DWORD_PTR	        dbg_curr_pid = 0;
dbg_ctx_t               dbg_context;
BOOL    	        dbg_interactiveP = FALSE;
HANDLE                  dbg_houtput = 0;

static struct list      dbg_process_list = LIST_INIT(dbg_process_list);

struct dbg_internal_var         dbg_internal_vars[DBG_IV_LAST];

static void dbg_outputA(const char* buffer, int len)
{
    static char line_buff[4096];
    static unsigned int line_pos;

    DWORD w, i;

    while (len > 0)
    {
        unsigned int count = min( len, sizeof(line_buff) - line_pos );
        memcpy( line_buff + line_pos, buffer, count );
        buffer += count;
        len -= count;
        line_pos += count;
        for (i = line_pos; i > 0; i--) if (line_buff[i-1] == '\n') break;
        if (!i)  /* no newline found */
        {
            if (len > 0) i = line_pos;  /* buffer is full, flush anyway */
            else break;
        }
        WriteFile(dbg_houtput, line_buff, i, &w, NULL);
        memmove( line_buff, line_buff + i, line_pos - i );
        line_pos -= i;
    }
}

const char* dbg_W2A(const WCHAR* buffer, unsigned len)
{
    static unsigned ansilen;
    static char* ansi;
    unsigned newlen;

    newlen = WideCharToMultiByte(CP_ACP, 0, buffer, len, NULL, 0, NULL, NULL);
    if (newlen > ansilen)
    {
        static char* newansi;
        if (ansi)
            newansi = HeapReAlloc(GetProcessHeap(), 0, ansi, newlen);
        else
            newansi = HeapAlloc(GetProcessHeap(), 0, newlen);
        if (!newansi) return NULL;
        ansilen = newlen;
        ansi = newansi;
    }
    WideCharToMultiByte(CP_ACP, 0, buffer, len, ansi, newlen, NULL, NULL);
    return ansi;
}

void	dbg_outputW(const WCHAR* buffer, int len)
{
    const char* ansi = dbg_W2A(buffer, len);
    if (ansi) dbg_outputA(ansi, strlen(ansi));
    /* FIXME: should CP_ACP be GetConsoleCP()? */
}

int	dbg_printf(const char* format, ...)
{
    static    char	buf[4*1024];
    va_list 	valist;
    int		len;

    va_start(valist, format);
    len = vsnprintf(buf, sizeof(buf), format, valist);
    va_end(valist);

    if (len <= -1 || len >= sizeof(buf)) 
    {
	len = sizeof(buf) - 1;
	buf[len] = 0;
	buf[len - 1] = buf[len - 2] = buf[len - 3] = '.';
    }
    dbg_outputA(buf, len);
    return len;
}

static	unsigned dbg_load_internal_vars(void)
{
    HKEY	                hkey;
    DWORD 	                type = REG_DWORD;
    DWORD	                val;
    DWORD 	                count = sizeof(val);
    int		                i;
    struct dbg_internal_var*    div = dbg_internal_vars;

/* initializes internal vars table */
#define  INTERNAL_VAR(_var,_val,_ref,_tid) 			\
        div->val = _val; div->name = #_var; div->pval = _ref;	\
        div->typeid = _tid; div++;
#include "intvar.h"
#undef   INTERNAL_VAR

    /* @@ Wine registry key: HKCU\Software\Wine\WineDbg */
    if (RegCreateKeyA(HKEY_CURRENT_USER, "Software\\Wine\\WineDbg", &hkey)) 
    {
	WINE_ERR("Cannot create WineDbg key in registry\n");
	return FALSE;
    }

    for (i = 0; i < DBG_IV_LAST; i++) 
    {
        if (!dbg_internal_vars[i].pval) 
        {
            if (!RegQueryValueExA(hkey, dbg_internal_vars[i].name, 0,
                                  &type, (LPBYTE)&val, &count))
                dbg_internal_vars[i].val = val;
            dbg_internal_vars[i].pval = &dbg_internal_vars[i].val;
        }
    }
    RegCloseKey(hkey);

    return TRUE;
}

static	unsigned dbg_save_internal_vars(void)
{
    HKEY	                hkey;
    int		                i;

    /* @@ Wine registry key: HKCU\Software\Wine\WineDbg */
    if (RegCreateKeyA(HKEY_CURRENT_USER, "Software\\Wine\\WineDbg", &hkey)) 
    {
	WINE_ERR("Cannot create WineDbg key in registry\n");
	return FALSE;
    }

    for (i = 0; i < DBG_IV_LAST; i++) 
    {
        /* FIXME: type should be inferred from basic type -if any- of intvar */
        if (dbg_internal_vars[i].pval == &dbg_internal_vars[i].val)
        {
            DWORD val = dbg_internal_vars[i].val;
            RegSetValueExA(hkey, dbg_internal_vars[i].name, 0, REG_DWORD, (BYTE *)&val, sizeof(val));
        }
    }
    RegCloseKey(hkey);
    return TRUE;
}

const struct dbg_internal_var* dbg_get_internal_var(const char* name)
{
    const struct dbg_internal_var*      div;

    for (div = &dbg_internal_vars[DBG_IV_LAST - 1]; div >= dbg_internal_vars; div--)
    {
	if (!strcmp(div->name, name)) return div;
    }
    for (div = dbg_curr_process->be_cpu->context_vars; div->name; div++)
    {
	if (!strcasecmp(div->name, name))
        {
            struct dbg_internal_var*    ret = (void*)lexeme_alloc_size(sizeof(*ret));
            /* relocate register's field against current context */
            *ret = *div;
            ret->pval = (DWORD_PTR*)((char*)&dbg_context + (DWORD_PTR)div->pval);
            return ret;
        }
    }

    return NULL;
}

unsigned         dbg_num_processes(void)
{
    return list_count(&dbg_process_list);
}

struct dbg_process*     dbg_get_process(DWORD pid)
{
    struct dbg_process*	p;

    LIST_FOR_EACH_ENTRY(p, &dbg_process_list, struct dbg_process, entry)
	if (p->pid == pid) return p;
    return NULL;
}

struct dbg_process*     dbg_get_process_h(HANDLE h)
{
    struct dbg_process*	p;

    LIST_FOR_EACH_ENTRY(p, &dbg_process_list, struct dbg_process, entry)
	if (p->handle == h) return p;
    return NULL;
}

#ifdef __i386__
extern struct backend_cpu be_i386;
#elif defined(__powerpc__)
extern struct backend_cpu be_ppc;
#elif defined(__x86_64__)
extern struct backend_cpu be_i386;
extern struct backend_cpu be_x86_64;
#elif defined(__arm__) && !defined(__ARMEB__)
extern struct backend_cpu be_arm;
#elif defined(__aarch64__) && !defined(__AARCH64EB__)
extern struct backend_cpu be_arm64;
#else
# error CPU unknown
#endif

struct dbg_process*	dbg_add_process(const struct be_process_io* pio, DWORD pid, HANDLE h)
{
    struct dbg_process*	p;
    BOOL wow64;

    if ((p = dbg_get_process(pid)))
        return p;

    if (!h)
        h = OpenProcess(PROCESS_ALL_ACCESS, FALSE, pid);

    if (!(p = HeapAlloc(GetProcessHeap(), 0, sizeof(struct dbg_process)))) return NULL;
    p->handle = h;
    p->pid = pid;
    p->process_io = pio;
    p->pio_data = NULL;
    p->imageName = NULL;
    list_init(&p->threads);
    p->event_on_first_exception = NULL;
    p->active_debuggee = FALSE;
    p->next_bp = 1;  /* breakpoint 0 is reserved for step-over */
    memset(p->bp, 0, sizeof(p->bp));
    p->delayed_bp = NULL;
    p->num_delayed_bp = 0;
    p->source_ofiles = NULL;
    p->search_path = NULL;
    p->source_current_file[0] = '\0';
    p->source_start_line = -1;
    p->source_end_line = -1;

    list_add_head(&dbg_process_list, &p->entry);

    IsWow64Process(h, &wow64);

#ifdef __i386__
    p->be_cpu = &be_i386;
#elif defined(__powerpc__)
    p->be_cpu = &be_ppc;
#elif defined(__x86_64__)
    p->be_cpu = wow64 ? &be_i386 : &be_x86_64;
#elif defined(__arm__) && !defined(__ARMEB__)
    p->be_cpu = &be_arm;
#elif defined(__aarch64__) && !defined(__AARCH64EB__)
    p->be_cpu = &be_arm64;
#else
# error CPU unknown
#endif
    return p;
}

void dbg_set_process_name(struct dbg_process* p, const WCHAR* imageName)
{
    assert(p->imageName == NULL);
    if (imageName)
    {
        WCHAR* tmp = HeapAlloc(GetProcessHeap(), 0, (lstrlenW(imageName) + 1) * sizeof(WCHAR));
        if (tmp) p->imageName = lstrcpyW(tmp, imageName);
    }
}

void dbg_del_process(struct dbg_process* p)
{
    struct dbg_thread*  t;
    struct dbg_thread*  t2;
    int	i;

    LIST_FOR_EACH_ENTRY_SAFE(t, t2, &p->threads, struct dbg_thread, entry)
        dbg_del_thread(t);

    for (i = 0; i < p->num_delayed_bp; i++)
        if (p->delayed_bp[i].is_symbol)
            HeapFree(GetProcessHeap(), 0, p->delayed_bp[i].u.symbol.name);

    HeapFree(GetProcessHeap(), 0, p->delayed_bp);
    source_nuke_path(p);
    source_free_files(p);
    list_remove(&p->entry);
    if (p == dbg_curr_process) dbg_curr_process = NULL;
    if (p->event_on_first_exception) CloseHandle(p->event_on_first_exception);
    HeapFree(GetProcessHeap(), 0, (char*)p->imageName);
    HeapFree(GetProcessHeap(), 0, p);
}

/******************************************************************
 *		dbg_init
 *
 * Initializes the dbghelp library, and also sets the application directory
 * as a place holder for symbol searches.
 */
BOOL dbg_init(HANDLE hProc, const WCHAR* in, BOOL invade)
{
    BOOL        ret;

    ret = SymInitialize(hProc, NULL, invade);
    if (ret && in)
    {
        const WCHAR*    last;

        for (last = in + lstrlenW(in) - 1; last >= in; last--)
        {
            if (*last == '/' || *last == '\\')
            {
                WCHAR*  tmp;
                tmp = HeapAlloc(GetProcessHeap(), 0, (1024 + 1 + (last - in) + 1) * sizeof(WCHAR));
                if (tmp && SymGetSearchPathW(hProc, tmp, 1024))
                {
                    WCHAR*      x = tmp + lstrlenW(tmp);

                    *x++ = ';';
                    memcpy(x, in, (last - in) * sizeof(WCHAR));
                    x[last - in] = '\0';
                    ret = SymSetSearchPathW(hProc, tmp);
                }
                else ret = FALSE;
                HeapFree(GetProcessHeap(), 0, tmp);
                break;
            }
        }
    }
    return ret;
}

struct mod_loader_info
{
    HANDLE              handle;
    IMAGEHLP_MODULE64*  imh_mod;
};

static BOOL CALLBACK mod_loader_cb(PCSTR mod_name, DWORD64 base, PVOID ctx)
{
    struct mod_loader_info*     mli = ctx;

    if (!strcmp(mod_name, "<wine-loader>"))
    {
        if (SymGetModuleInfo64(mli->handle, base, mli->imh_mod))
            return FALSE; /* stop enum */
    }
    return TRUE;
}

BOOL dbg_get_debuggee_info(HANDLE hProcess, IMAGEHLP_MODULE64* imh_mod)
{
    struct mod_loader_info  mli;
    BOOL                    opt;

    /* this will resynchronize builtin dbghelp's internal ELF module list */
    SymLoadModule(hProcess, 0, 0, 0, 0, 0);
    mli.handle  = hProcess;
    mli.imh_mod = imh_mod;
    imh_mod->SizeOfStruct = sizeof(*imh_mod);
    imh_mod->BaseOfImage = 0;
    /* this is a wine specific options to return also ELF modules in the
     * enumeration
     */
    opt = SymSetExtendedOption(SYMOPT_EX_WINE_NATIVE_MODULES, TRUE);
    SymEnumerateModules64(hProcess, mod_loader_cb, &mli);
    SymSetExtendedOption(SYMOPT_EX_WINE_NATIVE_MODULES, opt);

    return imh_mod->BaseOfImage != 0;
}

BOOL dbg_load_module(HANDLE hProc, HANDLE hFile, const WCHAR* name, DWORD_PTR base, DWORD size)
{
    BOOL ret = SymLoadModuleExW(hProc, NULL, name, NULL, base, size, NULL, 0);
    if (ret)
    {
        IMAGEHLP_MODULEW64      ihm;
        ihm.SizeOfStruct = sizeof(ihm);
        if (SymGetModuleInfoW64(hProc, base, &ihm) && (ihm.PdbUnmatched || ihm.DbgUnmatched))
            dbg_printf("Loaded unmatched debug information for %s\n", wine_dbgstr_w(name));
    }
    return ret;
}

struct dbg_thread* dbg_get_thread(struct dbg_process* p, DWORD tid)
{
    struct dbg_thread*	t;

    if (!p) return NULL;
    LIST_FOR_EACH_ENTRY(t, &p->threads, struct dbg_thread, entry)
	if (t->tid == tid) return t;
    return NULL;
}

struct dbg_thread* dbg_add_thread(struct dbg_process* p, DWORD tid,
                                  HANDLE h, void* teb)
{
    struct dbg_thread*	t = HeapAlloc(GetProcessHeap(), 0, sizeof(struct dbg_thread));

    if (!t)
	return NULL;

    t->handle = h;
    t->tid = tid;
    t->teb = teb;
    t->process = p;
    t->exec_mode = dbg_exec_cont;
    t->exec_count = 0;
    t->step_over_bp.enabled = FALSE;
    t->step_over_bp.refcount = 0;
    t->stopped_xpoint = -1;
    t->in_exception = FALSE;
    t->frames = NULL;
    t->num_frames = 0;
    t->curr_frame = -1;
    t->addr_mode = AddrModeFlat;

    snprintf(t->name, sizeof(t->name), "%04x", tid);

    list_add_head(&p->threads, &t->entry);

    return t;
}

void dbg_del_thread(struct dbg_thread* t)
{
    HeapFree(GetProcessHeap(), 0, t->frames);
    list_remove(&t->entry);
    if (t == dbg_curr_thread) dbg_curr_thread = NULL;
    HeapFree(GetProcessHeap(), 0, t);
}

void dbg_set_option(const char* option, const char* val)
{
    if (!strcasecmp(option, "module_load_mismatched"))
    {
        DWORD   opt = SymGetOptions();
        if (!val)
            dbg_printf("Option: module_load_mismatched %s\n", opt & SYMOPT_LOAD_ANYTHING ? "true" : "false");
        else if (!strcasecmp(val, "true"))      opt |= SYMOPT_LOAD_ANYTHING;
        else if (!strcasecmp(val, "false"))     opt &= ~SYMOPT_LOAD_ANYTHING;
        else
        {
            dbg_printf("Syntax: module_load_mismatched [true|false]\n");
            return;
        }
        SymSetOptions(opt);
    }
    else if (!strcasecmp(option, "symbol_picker"))
    {
        if (!val)
            dbg_printf("Option: symbol_picker %s\n",
                       symbol_current_picker == symbol_picker_interactive ? "interactive" : "scoped");
        else if (!strcasecmp(val, "interactive"))
            symbol_current_picker = symbol_picker_interactive;
        else if (!strcasecmp(val, "scoped"))
            symbol_current_picker = symbol_picker_scoped;
        else
        {
            dbg_printf("Syntax: symbol_picker [interactive|scoped]\n");
            return;
        }
    }
    else dbg_printf("Unknown option '%s'\n", option);
}

BOOL dbg_interrupt_debuggee(void)
{
    struct dbg_process* p;
    if (list_empty(&dbg_process_list)) return FALSE;
    /* FIXME: since we likely have a single process, signal the first process
     * in list
     */
    p = LIST_ENTRY(list_head(&dbg_process_list), struct dbg_process, entry);
    if (list_next(&dbg_process_list, &p->entry)) dbg_printf("Ctrl-C: only stopping the first process\n");
    else dbg_printf("Ctrl-C: stopping debuggee\n");
    if (p->event_on_first_exception)
    {
        SetEvent(p->event_on_first_exception);
        CloseHandle(p->event_on_first_exception);
        p->event_on_first_exception = NULL;
    }
    return DebugBreakProcess(p->handle);
}

static BOOL WINAPI ctrl_c_handler(DWORD dwCtrlType)
{
    if (dwCtrlType == CTRL_C_EVENT)
    {
        return dbg_interrupt_debuggee();
    }
    return FALSE;
}

void dbg_init_console(void)
{
    /* set the output handle */
    dbg_houtput = GetStdHandle(STD_OUTPUT_HANDLE);

    /* set our control-C handler */
    SetConsoleCtrlHandler(ctrl_c_handler, TRUE);

    /* set our own title */
    SetConsoleTitleA("Wine Debugger");
}

static int dbg_winedbg_usage(BOOL advanced)
{
    if (advanced)
    {
    dbg_printf("Usage:\n"
               "   winedbg <cmdline>       launch process <cmdline> (as if you were starting\n"
               "                           it with wine) and run WineDbg on it\n"
               "   winedbg <num>           attach to running process of wpid <num> and run\n"
               "                           WineDbg on it\n"
               "   winedbg --gdb <cmdline> launch process <cmdline> (as if you were starting\n"
               "                           wine) and run gdb (proxied) on it\n"
               "   winedbg --gdb <num>     attach to running process of wpid <num> and run\n"
               "                           gdb (proxied) on it\n"
               "   winedbg <file.mdmp>     reload the minidump <file.mdmp> into memory and run\n"
               "                           WineDbg on it\n"
               "   winedbg --help          prints advanced options\n");
    }
    else
        dbg_printf("Usage:\n\twinedbg [ [ --gdb ] [ <prog-name> [ <prog-args> ] | <num> | <file.mdmp> | --help ]\n");
    return 0;
}

void dbg_start_interactive(HANDLE hFile)
{
    struct dbg_process* p;
    struct dbg_process* p2;

    if (dbg_curr_process)
    {
        dbg_printf("WineDbg starting on pid %04lx\n", dbg_curr_pid);
        if (dbg_curr_process->active_debuggee) dbg_active_wait_for_first_exception();
    }

    dbg_interactiveP = TRUE;
    parser_handle(hFile);

    LIST_FOR_EACH_ENTRY_SAFE(p, p2, &dbg_process_list, struct dbg_process, entry)
        p->process_io->close_process(p, FALSE);

    dbg_save_internal_vars();
}

static LONG CALLBACK top_filter( EXCEPTION_POINTERS *ptr )
{
    dbg_printf( "winedbg: Internal crash at %p\n", ptr->ExceptionRecord->ExceptionAddress );
    return EXCEPTION_EXECUTE_HANDLER;
}

static void restart_if_wow64(void)
{
    BOOL is_wow64;

    if (IsWow64Process( GetCurrentProcess(), &is_wow64 ) && is_wow64)
    {
        STARTUPINFOW si;
        PROCESS_INFORMATION pi;
        WCHAR filename[MAX_PATH];
        void *redir;
        DWORD exit_code;

        memset( &si, 0, sizeof(si) );
        si.cb = sizeof(si);
        GetModuleFileNameW( 0, filename, MAX_PATH );

        Wow64DisableWow64FsRedirection( &redir );
        if (CreateProcessW( filename, GetCommandLineW(), NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi ))
        {
            WINE_TRACE( "restarting %s\n", wine_dbgstr_w(filename) );
            SetConsoleCtrlHandler( NULL, TRUE ); /* Ignore ^C */
            WaitForSingleObject( pi.hProcess, INFINITE );
            GetExitCodeProcess( pi.hProcess, &exit_code );
            ExitProcess( exit_code );
        }
        else WINE_ERR( "failed to restart 64-bit %s, err %d\n", wine_dbgstr_w(filename), GetLastError() );
        Wow64RevertWow64FsRedirection( redir );
    }
}

int __cdecl main(int argc, char** argv)
{
    int 	        retv = 0;
    HANDLE              hFile = INVALID_HANDLE_VALUE;
    enum dbg_start      ds;

    /* Initialize the output */
    dbg_houtput = GetStdHandle(STD_OUTPUT_HANDLE);

    SetUnhandledExceptionFilter( top_filter );

    /* Initialize internal vars */
    if (!dbg_load_internal_vars()) return -1;

    /* as we don't care about exec name */
    argc--; argv++;

    if (argc && !strcmp(argv[0], "--help"))
        return dbg_winedbg_usage(TRUE);

    if (argc && !strcmp(argv[0], "--gdb"))
    {
        restart_if_wow64();
        retv = gdb_main(argc, argv);
        if (retv == -1) dbg_winedbg_usage(FALSE);
        return retv;
    }
    dbg_init_console();

    SymSetOptions((SymGetOptions() & ~(SYMOPT_UNDNAME)) |
                  SYMOPT_LOAD_LINES | SYMOPT_DEFERRED_LOADS | SYMOPT_AUTO_PUBLICS);

    if (argc && !strcmp(argv[0], "--auto"))
    {
        switch (dbg_active_auto(argc, argv))
        {
        case start_ok:          return 0;
        case start_error_parse: return dbg_winedbg_usage(FALSE);
        case start_error_init:  return -1;
        }
    }
    if (argc && !strcmp(argv[0], "--minidump"))
    {
        switch (dbg_active_minidump(argc, argv))
        {
        case start_ok:          return 0;
        case start_error_parse: return dbg_winedbg_usage(FALSE);
        case start_error_init:  return -1;
        }
    }
    /* parse options */
    while (argc > 0 && argv[0][0] == '-')
    {
        if (!strcmp(argv[0], "--command"))
        {
            argc--; argv++;
            hFile = parser_generate_command_file(argv[0], NULL);
            if (hFile == INVALID_HANDLE_VALUE)
            {
                dbg_printf("Couldn't open temp file (%u)\n", GetLastError());
                return 1;
            }
            argc--; argv++;
            continue;
        }
        if (!strcmp(argv[0], "--file"))
        {
            argc--; argv++;
            hFile = CreateFileA(argv[0], GENERIC_READ|DELETE, 0, 
                                NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
            if (hFile == INVALID_HANDLE_VALUE)
            {
                dbg_printf("Couldn't open file %s (%u)\n", argv[0], GetLastError());
                return 1;
            }
            argc--; argv++;
            continue;
        }
        if (!strcmp(argv[0], "--"))
        {
            argc--; argv++;
            break;
        }
        return dbg_winedbg_usage(FALSE);
    }
    if (!argc) ds = start_ok;
    else if ((ds = dbg_active_attach(argc, argv)) == start_error_parse &&
             (ds = minidump_reload(argc, argv)) == start_error_parse)
        ds = dbg_active_launch(argc, argv);
    switch (ds)
    {
    case start_ok:              break;
    case start_error_parse:     return dbg_winedbg_usage(FALSE);
    case start_error_init:      return -1;
    }

    restart_if_wow64();

    dbg_start_interactive(hFile);

    return 0;
}