dlls/kernel32/toolhelp.c

   1 /*
   2  * Misc Toolhelp functions
   3  *
   4  * Copyright 1996 Marcus Meissner
   5  * Copyright 2005 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  */
  21
  22 #include "config.h"
  23
  24 #include <stdarg.h>
  25 #include <stdlib.h>
  26 #include <string.h>
  27 #ifdef HAVE_UNISTD_H
  28 # include <unistd.h>
  29 #endif
  30 #include <ctype.h>
  31 #include <assert.h>
  32 #include "ntstatus.h"
  33 #define WIN32_NO_STATUS
  34 #include "windef.h"
  35 #include "winbase.h"
  36 #include "winerror.h"
  37 #include "tlhelp32.h"
  38 #include "winnls.h"
  39 #include "winternl.h"
  40
  41 #include "wine/debug.h"
  42
  43 WINE_DEFAULT_DEBUG_CHANNEL(toolhelp);
  44
  45 struct snapshot
  46 {
  47     int         process_count;
  48     int         process_pos;
  49     int         process_offset;
  50     int         thread_count;
  51     int         thread_pos;
  52     int         thread_offset;
  53     int         module_count;
  54     int         module_pos;
  55     int         module_offset;
  56     char        data[1];
  57 };
  58
  59 static WCHAR *fetch_string( HANDLE hProcess, UNICODE_STRING* us)
  60 {
  61     WCHAR*      local;
  62
  63     local = HeapAlloc( GetProcessHeap(), 0, us->Length );
  64     if (local)
  65     {
  66         if (!ReadProcessMemory( hProcess, us->Buffer, local, us->Length, NULL))
  67         {
  68             HeapFree( GetProcessHeap(), 0, local );
  69             local = NULL;
  70         }
  71     }
  72     us->Buffer = local;
  73     return local;
  74 }
  75
  76 static BOOL fetch_module( DWORD process, DWORD flags, LDR_MODULE** ldr_mod, ULONG* num )
  77 {
  78     HANDLE                      hProcess;
  79     PROCESS_BASIC_INFORMATION   pbi;
  80     PPEB_LDR_DATA               pLdrData;
  81     NTSTATUS                    status;
  82     PLIST_ENTRY                 head, curr;
  83     BOOL                        ret = FALSE;
  84
  85     *num = 0;
  86
  87     if (!(flags & TH32CS_SNAPMODULE)) return TRUE;
  88
  89     if (process)
  90     {
  91         hProcess = OpenProcess( PROCESS_VM_READ | PROCESS_QUERY_INFORMATION, FALSE, process );
  92         if (!hProcess) return FALSE;
  93     }
  94     else
  95         hProcess = GetCurrentProcess();
  96
  97     status = NtQueryInformationProcess( hProcess, ProcessBasicInformation,
  98                                         &pbi, sizeof(pbi), NULL );
  99     if (!status)
 100     {
 101         if (ReadProcessMemory( hProcess, &pbi.PebBaseAddress->LdrData,
 102                                &pLdrData, sizeof(pLdrData), NULL ) &&
 103             ReadProcessMemory( hProcess,
 104                                &pLdrData->InLoadOrderModuleList.Flink,
 105                                &curr, sizeof(curr), NULL ))
 106         {
 107             head = &pLdrData->InLoadOrderModuleList;
 108
 109             while (curr != head)
 110             {
 111                 if (!*num)
 112                     *ldr_mod = HeapAlloc( GetProcessHeap(), 0, sizeof(LDR_MODULE) );
 113                 else
 114                     *ldr_mod = HeapReAlloc( GetProcessHeap(), 0, *ldr_mod,
 115                                             (*num + 1) * sizeof(LDR_MODULE) );
 116                 if (!*ldr_mod) break;
 117                 if (!ReadProcessMemory( hProcess,
 118                                         CONTAINING_RECORD(curr, LDR_MODULE,
 119                                                           InLoadOrderModuleList),
 120                                         &(*ldr_mod)[*num],
 121                                         sizeof(LDR_MODULE), NULL))
 122                     break;
 123                 curr = (*ldr_mod)[*num].InLoadOrderModuleList.Flink;
 124                 /* if we cannot fetch the strings, then just ignore this LDR_MODULE
 125                  * and continue loading the other ones in the list
 126                  */
 127                 if (!fetch_string( hProcess, &(*ldr_mod)[*num].BaseDllName )) continue;
 128                 if (fetch_string( hProcess, &(*ldr_mod)[*num].FullDllName ))
 129                     (*num)++;
 130                 else
 131                     HeapFree( GetProcessHeap(), 0, (*ldr_mod)[*num].BaseDllName.Buffer );
 132             }
 133             ret = TRUE;
 134         }
 135     }
 136     else SetLastError( RtlNtStatusToDosError( status ) );
 137
 138     if (process) CloseHandle( hProcess );
 139     return ret;
 140 }
 141
 142 static void fill_module( struct snapshot* snap, ULONG* offset, ULONG process,
 143                          LDR_MODULE* ldr_mod, ULONG num )
 144 {
 145     MODULEENTRY32W*     mod;
 146     ULONG               i;
 147     SIZE_T              l;
 148
 149     snap->module_count = num;
 150     snap->module_pos = 0;
 151     if (!num) return;
 152     snap->module_offset = *offset;
 153
 154     mod = (MODULEENTRY32W*)&snap->data[*offset];
 155
 156     for (i = 0; i < num; i++)
 157     {
 158         mod->dwSize = sizeof(MODULEENTRY32W);
 159         mod->th32ModuleID = 1; /* toolhelp internal id, never used */
 160         mod->th32ProcessID = process ? process : GetCurrentProcessId();
 161         mod->GlblcntUsage = 0xFFFF; /* FIXME */
 162         mod->ProccntUsage = 0xFFFF; /* FIXME */
 163         mod->modBaseAddr = (BYTE*)ldr_mod[i].BaseAddress;
 164         mod->modBaseSize = ldr_mod[i].SizeOfImage;
 165         mod->hModule = (HMODULE)ldr_mod[i].BaseAddress;
 166
 167         l = min(ldr_mod[i].BaseDllName.Length, sizeof(mod->szModule) - sizeof(WCHAR));
 168         memcpy(mod->szModule, ldr_mod[i].BaseDllName.Buffer, l);
 169         mod->szModule[l / sizeof(WCHAR)] = '\0';
 170         l = min(ldr_mod[i].FullDllName.Length, sizeof(mod->szExePath) - sizeof(WCHAR));
 171         memcpy(mod->szExePath, ldr_mod[i].FullDllName.Buffer, l);
 172         mod->szExePath[l / sizeof(WCHAR)] = '\0';
 173
 174         mod++;
 175     }
 176
 177     *offset += num * sizeof(MODULEENTRY32W);
 178 }
 179
 180 static BOOL fetch_process_thread( DWORD flags, SYSTEM_PROCESS_INFORMATION** pspi,
 181                                   ULONG* num_pcs, ULONG* num_thd)
 182 {
 183     NTSTATUS                    status;
 184     ULONG                       size, offset;
 185     PSYSTEM_PROCESS_INFORMATION spi;
 186
 187     *num_pcs = *num_thd = 0;
 188     if (!(flags & (TH32CS_SNAPPROCESS | TH32CS_SNAPTHREAD))) return TRUE;
 189
 190     *pspi = HeapAlloc( GetProcessHeap(), 0, size = 4096 );
 191     for (;;)
 192     {
 193         status = NtQuerySystemInformation( SystemProcessInformation, *pspi,
 194                                            size, NULL );
 195         switch (status)
 196         {
 197         case STATUS_SUCCESS:
 198             *num_pcs = *num_thd = offset = 0;
 199             spi = *pspi;
 200             do
 201             {
 202                 spi = (SYSTEM_PROCESS_INFORMATION*)((char*)spi + offset);
 203                 if (flags & TH32CS_SNAPPROCESS) (*num_pcs)++;
 204                 if (flags & TH32CS_SNAPTHREAD) *num_thd += spi->dwThreadCount;
 205             } while ((offset = spi->dwOffset));
 206             return TRUE;
 207         case STATUS_INFO_LENGTH_MISMATCH:
 208             *pspi = HeapReAlloc( GetProcessHeap(), 0, *pspi, size *= 2 );
 209             break;
 210         default:
 211             SetLastError( RtlNtStatusToDosError( status ) );
 212             break;
 213         }
 214     }
 215 }
 216
 217 static void fill_process( struct snapshot* snap, ULONG* offset,
 218                           SYSTEM_PROCESS_INFORMATION* spi, ULONG num )
 219 {
 220     PROCESSENTRY32W*            pcs_entry;
 221     ULONG                       poff = 0;
 222     SIZE_T                      l;
 223
 224     snap->process_count = num;
 225     snap->process_pos = 0;
 226     if (!num) return;
 227     snap->process_offset = *offset;
 228
 229     pcs_entry = (PROCESSENTRY32W*)&snap->data[*offset];
 230
 231     do
 232     {
 233         spi = (SYSTEM_PROCESS_INFORMATION*)((char*)spi + poff);
 234
 235         pcs_entry->dwSize = sizeof(PROCESSENTRY32W);
 236         pcs_entry->cntUsage = 0; /* MSDN says no longer used, always 0 */
 237         pcs_entry->th32ProcessID = spi->dwProcessID;
 238         pcs_entry->th32DefaultHeapID = 0; /* MSDN says no longer used, always 0 */
 239         pcs_entry->th32ModuleID = 0; /* MSDN says no longer used, always 0 */
 240         pcs_entry->cntThreads = spi->dwThreadCount;
 241         pcs_entry->th32ParentProcessID = spi->dwParentProcessID;
 242         pcs_entry->pcPriClassBase = spi->dwBasePriority;
 243         pcs_entry->dwFlags = 0; /* MSDN says no longer used, always 0 */
 244         l = min(spi->ProcessName.Length, sizeof(pcs_entry->szExeFile) - sizeof(WCHAR));
 245         memcpy(pcs_entry->szExeFile, spi->ProcessName.Buffer, l);
 246         pcs_entry->szExeFile[l / sizeof(WCHAR)] = '\0';
 247         pcs_entry++;
 248     } while ((poff = spi->dwOffset));
 249
 250     *offset += num * sizeof(PROCESSENTRY32W);
 251 }
 252
 253 static void fill_thread( struct snapshot* snap, ULONG* offset, LPVOID info, ULONG num )
 254 {
 255     THREADENTRY32*              thd_entry;
 256     SYSTEM_PROCESS_INFORMATION* spi;
 257     SYSTEM_THREAD_INFORMATION*  sti;
 258     ULONG                       i, poff = 0;
 259
 260     snap->thread_count = num;
 261     snap->thread_pos = 0;
 262     if (!num) return;
 263     snap->thread_offset = *offset;
 264
 265     thd_entry = (THREADENTRY32*)&snap->data[*offset];
 266
 267     spi = (SYSTEM_PROCESS_INFORMATION*)info;
 268     do
 269     {
 270         spi = (SYSTEM_PROCESS_INFORMATION*)((char*)spi + poff);
 271         sti = &spi->ti[0];
 272
 273         for (i = 0; i < spi->dwThreadCount; i++)
 274         {
 275             thd_entry->dwSize = sizeof(THREADENTRY32);
 276             thd_entry->cntUsage = 0; /* MSDN says no longer used, always 0 */
 277             thd_entry->th32ThreadID = sti->dwThreadID;
 278             thd_entry->th32OwnerProcessID = sti->dwOwningPID;
 279             thd_entry->tpBasePri = sti->dwBasePriority;
 280             thd_entry->tpDeltaPri = 0; /* MSDN says no longer used, always 0 */
 281             thd_entry->dwFlags = 0; /* MSDN says no longer used, always 0" */
 282
 283             sti++;
 284             thd_entry++;
 285       }
 286     } while ((poff = spi->dwOffset));
 287     *offset += num * sizeof(THREADENTRY32);
 288 }
 289
 290 /***********************************************************************
 291  *           CreateToolhelp32Snapshot                   (KERNEL32.@)
 292  */
 293 HANDLE WINAPI CreateToolhelp32Snapshot( DWORD flags, DWORD process )
 294 {
 295     SYSTEM_PROCESS_INFORMATION* spi = NULL;
 296     LDR_MODULE*         mod = NULL;
 297     ULONG               num_pcs, num_thd, num_mod;
 298     HANDLE              hSnapShot = 0;
 299
 300     TRACE("%x,%x\n", flags, process );
 301     if (!(flags & (TH32CS_SNAPPROCESS|TH32CS_SNAPTHREAD|TH32CS_SNAPMODULE)))
 302     {
 303         FIXME("flags %x not implemented\n", flags );
 304         SetLastError( ERROR_CALL_NOT_IMPLEMENTED );
 305         return INVALID_HANDLE_VALUE;
 306     }
 307
 308     if (fetch_module( process, flags, &mod, &num_mod ) &&
 309         fetch_process_thread( flags, &spi, &num_pcs, &num_thd ))
 310     {
 311         ULONG sect_size;
 312         struct snapshot*snap;
 313         SECURITY_ATTRIBUTES sa;
 314
 315         /* create & fill the snapshot section */
 316         sect_size = sizeof(struct snapshot) - 1; /* for last data[1] */
 317         if (flags & TH32CS_SNAPMODULE)  sect_size += num_mod * sizeof(MODULEENTRY32W);
 318         if (flags & TH32CS_SNAPPROCESS) sect_size += num_pcs * sizeof(PROCESSENTRY32W);
 319         if (flags & TH32CS_SNAPTHREAD)  sect_size += num_thd * sizeof(THREADENTRY32);
 320         if (flags & TH32CS_SNAPHEAPLIST)FIXME("Unimplemented: heap list snapshot\n");
 321
 322         sa.bInheritHandle = (flags & TH32CS_INHERIT) ? TRUE : FALSE;
 323         sa.lpSecurityDescriptor = NULL;
 324
 325         hSnapShot = CreateFileMappingW( INVALID_HANDLE_VALUE, &sa,
 326                                         SEC_COMMIT | PAGE_READWRITE,
 327                                         0, sect_size, NULL );
 328         if (hSnapShot && (snap = MapViewOfFile( hSnapShot, FILE_MAP_ALL_ACCESS, 0, 0, 0 )))
 329         {
 330             DWORD   offset = 0;
 331
 332             fill_module( snap, &offset, process, mod, num_mod );
 333             fill_process( snap, &offset, spi, num_pcs );
 334             fill_thread( snap, &offset, spi, num_thd );
 335             UnmapViewOfFile( snap );
 336         }
 337     }
 338
 339     while (num_mod--)
 340     {
 341         HeapFree( GetProcessHeap(), 0, mod[num_mod].BaseDllName.Buffer );
 342         HeapFree( GetProcessHeap(), 0, mod[num_mod].FullDllName.Buffer );
 343     }
 344     HeapFree( GetProcessHeap(), 0, mod );
 345     HeapFree( GetProcessHeap(), 0, spi );
 346
 347     if (!hSnapShot) return INVALID_HANDLE_VALUE;
 348     return hSnapShot;
 349 }
 350
 351 static BOOL next_thread( HANDLE hSnapShot, LPTHREADENTRY32 lpte, BOOL first )
 352 {
 353     struct snapshot*    snap;
 354     BOOL                ret = FALSE;
 355
 356     if (lpte->dwSize < sizeof(THREADENTRY32))
 357     {
 358         SetLastError( ERROR_INSUFFICIENT_BUFFER );
 359         WARN("Result buffer too small (%d)\n", lpte->dwSize);
 360         return FALSE;
 361     }
 362     if ((snap = MapViewOfFile( hSnapShot, FILE_MAP_ALL_ACCESS, 0, 0, 0 )))
 363     {
 364         if (first) snap->thread_pos = 0;
 365         if (snap->thread_pos < snap->thread_count)
 366         {
 367             LPTHREADENTRY32 te = (THREADENTRY32*)&snap->data[snap->thread_offset];
 368             *lpte = te[snap->thread_pos++];
 369             ret = TRUE;
 370         }
 371         else SetLastError( ERROR_NO_MORE_FILES );
 372         UnmapViewOfFile( snap );
 373     }
 374     return ret;
 375 }
 376
 377 /***********************************************************************
 378  *              Thread32First    (KERNEL32.@)
 379  *
 380  * Return info about the first thread in a toolhelp32 snapshot
 381  */
 382 BOOL WINAPI Thread32First( HANDLE hSnapShot, LPTHREADENTRY32 lpte )
 383 {
 384     return next_thread( hSnapShot, lpte, TRUE );
 385 }
 386
 387 /***********************************************************************
 388  *              Thread32Next    (KERNEL32.@)
 389  *
 390  * Return info about the first thread in a toolhelp32 snapshot
 391  */
 392 BOOL WINAPI Thread32Next( HANDLE hSnapShot, LPTHREADENTRY32 lpte )
 393 {
 394     return next_thread( hSnapShot, lpte, FALSE );
 395 }
 396
 397 /***********************************************************************
 398  *              process_next
 399  *
 400  * Implementation of Process32First/Next. Note that the ANSI / Unicode
 401  * version check is a bit of a hack as it relies on the fact that only
 402  * the last field is actually different.
 403  */
 404 static BOOL process_next( HANDLE hSnapShot, LPPROCESSENTRY32W lppe,
 405                           BOOL first, BOOL unicode )
 406 {
 407     struct snapshot*    snap;
 408     BOOL                ret = FALSE;
 409     DWORD               sz = unicode ? sizeof(PROCESSENTRY32W) : sizeof(PROCESSENTRY32);
 410
 411     if (lppe->dwSize < sz)
 412     {
 413         SetLastError( ERROR_INSUFFICIENT_BUFFER );
 414         WARN("Result buffer too small (%d)\n", lppe->dwSize);
 415         return FALSE;
 416     }
 417     if ((snap = MapViewOfFile( hSnapShot, FILE_MAP_ALL_ACCESS, 0, 0, 0 )))
 418     {
 419         if (first) snap->process_pos = 0;
 420         if (snap->process_pos < snap->process_count)
 421         {
 422             LPPROCESSENTRY32W pe = (PROCESSENTRY32W*)&snap->data[snap->process_offset];
 423             if (unicode)
 424                 *lppe = pe[snap->process_pos];
 425             else
 426             {
 427                 lppe->cntUsage = pe[snap->process_pos].cntUsage;
 428                 lppe->th32ProcessID = pe[snap->process_pos].th32ProcessID;
 429                 lppe->th32DefaultHeapID = pe[snap->process_pos].th32DefaultHeapID;
 430                 lppe->th32ModuleID = pe[snap->process_pos].th32ModuleID;
 431                 lppe->cntThreads = pe[snap->process_pos].cntThreads;
 432                 lppe->th32ParentProcessID = pe[snap->process_pos].th32ParentProcessID;
 433                 lppe->pcPriClassBase = pe[snap->process_pos].pcPriClassBase;
 434                 lppe->dwFlags = pe[snap->process_pos].dwFlags;
 435
 436                 WideCharToMultiByte( CP_ACP, 0, pe[snap->process_pos].szExeFile, -1,
 437                                      (char*)lppe->szExeFile, sizeof(lppe->szExeFile),
 438                                      0, 0 );
 439             }
 440             snap->process_pos++;
 441             ret = TRUE;
 442         }
 443         else SetLastError( ERROR_NO_MORE_FILES );
 444         UnmapViewOfFile( snap );
 445     }
 446
 447     return ret;
 448 }
 449
 450
 451 /***********************************************************************
 452  *              Process32First    (KERNEL32.@)
 453  *
 454  * Return info about the first process in a toolhelp32 snapshot
 455  */
 456 BOOL WINAPI Process32First(HANDLE hSnapshot, LPPROCESSENTRY32 lppe)
 457 {
 458     return process_next( hSnapshot, (PROCESSENTRY32W*)lppe, TRUE, FALSE /* ANSI */ );
 459 }
 460
 461 /***********************************************************************
 462  *              Process32Next   (KERNEL32.@)
 463  *
 464  * Return info about the "next" process in a toolhelp32 snapshot
 465  */
 466 BOOL WINAPI Process32Next(HANDLE hSnapshot, LPPROCESSENTRY32 lppe)
 467 {
 468     return process_next( hSnapshot, (PROCESSENTRY32W*)lppe, FALSE, FALSE /* ANSI */ );
 469 }
 470
 471 /***********************************************************************
 472  *              Process32FirstW    (KERNEL32.@)
 473  *
 474  * Return info about the first process in a toolhelp32 snapshot
 475  */
 476 BOOL WINAPI Process32FirstW(HANDLE hSnapshot, LPPROCESSENTRY32W lppe)
 477 {
 478     return process_next( hSnapshot, lppe, TRUE, TRUE /* Unicode */ );
 479 }
 480
 481 /***********************************************************************
 482  *              Process32NextW   (KERNEL32.@)
 483  *
 484  * Return info about the "next" process in a toolhelp32 snapshot
 485  */
 486 BOOL WINAPI Process32NextW(HANDLE hSnapshot, LPPROCESSENTRY32W lppe)
 487 {
 488     return process_next( hSnapshot, lppe, FALSE, TRUE /* Unicode */ );
 489 }
 490
 491 /***********************************************************************
 492  *              module_nextW
 493  *
 494  * Implementation of Module32{First|Next}W
 495  */
 496 static BOOL module_nextW( HANDLE hSnapShot, LPMODULEENTRY32W lpme, BOOL first )
 497 {
 498     struct snapshot*    snap;
 499     BOOL                ret = FALSE;
 500
 501     if (lpme->dwSize < sizeof (MODULEENTRY32W))
 502     {
 503         SetLastError( ERROR_INSUFFICIENT_BUFFER );
 504         WARN("Result buffer too small (was: %d)\n", lpme->dwSize);
 505         return FALSE;
 506     }
 507     if ((snap = MapViewOfFile( hSnapShot, FILE_MAP_ALL_ACCESS, 0, 0, 0 )))
 508     {
 509         if (first) snap->module_pos = 0;
 510         if (snap->module_pos < snap->module_count)
 511         {
 512             LPMODULEENTRY32W pe = (MODULEENTRY32W*)&snap->data[snap->module_offset];
 513             *lpme = pe[snap->module_pos++];
 514             ret = TRUE;
 515         }
 516         else SetLastError( ERROR_NO_MORE_FILES );
 517         UnmapViewOfFile( snap );
 518     }
 519
 520     return ret;
 521 }
 522
 523 /***********************************************************************
 524  *              Module32FirstW   (KERNEL32.@)
 525  *
 526  * Return info about the "first" module in a toolhelp32 snapshot
 527  */
 528 BOOL WINAPI Module32FirstW(HANDLE hSnapshot, LPMODULEENTRY32W lpme)
 529 {
 530     return module_nextW( hSnapshot, lpme, TRUE );
 531 }
 532
 533 /***********************************************************************
 534  *              Module32NextW   (KERNEL32.@)
 535  *
 536  * Return info about the "next" module in a toolhelp32 snapshot
 537  */
 538 BOOL WINAPI Module32NextW(HANDLE hSnapshot, LPMODULEENTRY32W lpme)
 539 {
 540     return module_nextW( hSnapshot, lpme, FALSE );
 541 }
 542
 543 /***********************************************************************
 544  *              module_nextA
 545  *
 546  * Implementation of Module32{First|Next}A
 547  */
 548 static BOOL module_nextA( HANDLE handle, LPMODULEENTRY32 lpme, BOOL first )
 549 {
 550     BOOL ret;
 551     MODULEENTRY32W mew;
 552
 553     if (lpme->dwSize < sizeof(MODULEENTRY32))
 554     {
 555         SetLastError( ERROR_INSUFFICIENT_BUFFER );
 556         WARN("Result buffer too small (was: %d)\n", lpme->dwSize);
 557         return FALSE;
 558     }
 559
 560     mew.dwSize = sizeof(mew);
 561     if ((ret = module_nextW( handle, &mew, first )))
 562     {
 563         lpme->th32ModuleID  = mew.th32ModuleID;
 564         lpme->th32ProcessID = mew.th32ProcessID;
 565         lpme->GlblcntUsage  = mew.GlblcntUsage;
 566         lpme->ProccntUsage  = mew.ProccntUsage;
 567         lpme->modBaseAddr   = mew.modBaseAddr;
 568         lpme->modBaseSize   = mew.modBaseSize;
 569         lpme->hModule       = mew.hModule;
 570         WideCharToMultiByte( CP_ACP, 0, mew.szModule, -1, lpme->szModule, sizeof(lpme->szModule), NULL, NULL );
 571         WideCharToMultiByte( CP_ACP, 0, mew.szExePath, -1, lpme->szExePath, sizeof(lpme->szExePath), NULL, NULL );
 572     }
 573     return ret;
 574 }
 575
 576 /***********************************************************************
 577  *              Module32First   (KERNEL32.@)
 578  *
 579  * Return info about the "first" module in a toolhelp32 snapshot
 580  */
 581 BOOL WINAPI Module32First(HANDLE hSnapshot, LPMODULEENTRY32 lpme)
 582 {
 583     return module_nextA( hSnapshot, lpme, TRUE );
 584 }
 585
 586 /***********************************************************************
 587  *              Module32Next   (KERNEL32.@)
 588  *
 589  * Return info about the "next" module in a toolhelp32 snapshot
 590  */
 591 BOOL WINAPI Module32Next(HANDLE hSnapshot, LPMODULEENTRY32 lpme)
 592 {
 593     return module_nextA( hSnapshot, lpme, FALSE );
 594 }
 595
 596 /************************************************************************
 597  *              Heap32ListFirst (KERNEL32.@)
 598  *
 599  */
 600 BOOL WINAPI Heap32ListFirst(HANDLE hSnapshot, LPHEAPLIST32 lphl)
 601 {
 602     FIXME(": stub\n");
 603     return FALSE;
 604 }
 605
 606 /******************************************************************
 607  *              Toolhelp32ReadProcessMemory (KERNEL32.@)
 608  *
 609  *
 610  */
 611 BOOL WINAPI Toolhelp32ReadProcessMemory(DWORD pid, const void* base,
 612                                         void* buf, SIZE_T len, SIZE_T* r)
 613 {
 614     HANDLE h;
 615     BOOL   ret = FALSE;
 616
 617     h = (pid) ? OpenProcess(PROCESS_VM_READ, FALSE, pid) : GetCurrentProcess();
 618     if (h != NULL)
 619     {
 620         ret = ReadProcessMemory(h, base, buf, len, r);
 621         if (pid) CloseHandle(h);
 622     }
 623     return ret;
 624 }