Le processus de création ne fonctionne pas

Question

Je suis en train de créer un processus et de faire réquisitionner de nombreux objets du noyau auprès du système. Mon code est le suivant:

int main(){
    //Cria processo para o Data Viewer Unit
        LPSTARTUPINFOA si;
    PROCESS_INFORMATION pi;

    // Start the child process. 
    if(!CreateProcessA( 
                "E:\\Documents\\Faculdade\\Matérias\\Automação em Tempo Real\\TP 3\\DataViewerUnit\\Debug\\DataViewerUnit.exe", // Module name
                NULL,                                   // Command line
                NULL,                                   // Process handle not inheritable
                NULL,                                   // Thread handle not inheritable
                FALSE,                              // Set handle inheritance to FALSE
                CREATE_NEW_CONSOLE,   // No creation flags
                NULL,                                   // Use parent's environment block
                NULL,                                   // Use parent's starting directory 
                si,                                     // Pointer to STARTUPINFO structure
                &pi )                                   // Pointer to PROCESS_INFORMATION structure
    ) 
    {
        printf( "CreateProcess failed (%d).\n", GetLastError() );
        return 0;
    }

  // Wait until child process exits.
  WaitForSingleObject( pi.hProcess, INFINITE );

    LOG("Traffic System initiating...");
    LOG("Keyboard commands:\n"
        "0              - Changes the system mode to manual.\n"
        "1              - Changes the system mode to automatic.\n"
        "Spacebar - Swaps between buffer lock and unlock.\n"
        "ESC            - Terminates the program."
        );

    system("PAUSE");
    isAutoMode = TRUE;
    terminate_progam = FALSE;
    terminate_TOU = FALSE;
    bufferSpace = BUFFER_SIZE;
    InitializeCriticalSection(&bufferCS);
    system("PAUSE");
    hMailslot = CreateFile(MAILSLOT, GENERIC_WRITE, FILE_SHARE_READ, 
        NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
    ASSERT(hMailslot, "Mailslot couldn't be created");

    hHasPosition = CreateSemaphore(NULL, BUFFER_SIZE, BUFFER_SIZE, 
        (LPCWSTR)"HAS_POSITION");
    ASSERT(hHasPosition, "Positions to write semaphore couldn't be created.");

    hHasMsg = CreateSemaphore(NULL, 0, BUFFER_SIZE, (LPCWSTR)"HAS_MSG");
    ASSERT(hHasMsg, "Messages to read semaphore couldn't be created.");

    hBufferLockStatus = CreateEvent(NULL, true, true, 
        (LPCWSTR)"BUFFER_LOCK_STATUS");
    ASSERT(hBufferLockStatus, "Lock status semaphore couldn't be created.");

    hTimer = CreateSemaphore(NULL, 0, 1, (LPCWSTR)"REMOTE_UNITS_TIMER");
    ASSERT(hTimer, "Timer semaphore couldn't be created.");

    nextMsgToRead = 0;
    nextPositionToWrite = 0;

    for (int i = 0;i < RU_QUANTITY;i++) {
        hRUs[i] = (HANDLE) _beginthreadex(NULL, 0, (CAST_FUNCTION)RUAction, (LPVOID)i, 0, NULL);
        ASSERT(hRUs[i], "RU " << i << "could not be created.");
        DEBUG("RU " << i << " created.");
        RUTime[i] = generateTime(100, 200);
    DEBUG("Remote Unit " << i << " interval: " <<
        RUTime[i]);
    }

    HANDLE hTOU = (HANDLE) _beginthreadex(NULL, 0, (CAST_FUNCTION)TOUAction, NULL, 0, NULL);
    ASSERT(hTOU, "Traffic Optimization Unit couldn't be created.");

    bool isLocked = false;
    int typed;
    do{
        typed = _getch();
        switch(typed){
        case CHAR0:         
            if(isAutoMode)
                LOG("You changed the mode to manual.")
            else
                LOG("Mode is already manual.")
                isAutoMode = false;
            break;
        case CHAR1:         
            if(!isAutoMode)
                LOG("You changed the mode to automatic.")
            else
                LOG("Mode is already automatic.")
            isAutoMode = true;
            break;
        case SPACEBAR :
            if(isLocked){
                isLocked = false;
                SetEvent(hBufferLockStatus);
                LOG("You unlocked the buffer.");
            } else {
                isLocked = true;
                ResetEvent(hBufferLockStatus);
                LOG("You locked the buffer.");
            }
            break;
        Default:
            break;
        }
    } while (typed!=ESC);
    LOG("You typed ESC, the program will be finished.");
    //Pede o fim das threads

    terminate_progam = true;
    // Importante para que as threads não fiquem 
    // travadas sem poder terminar.
    SetEvent(hBufferLockStatus);
    WaitForMultipleObjects(RU_QUANTITY, hRUs, TRUE, INFINITE);
    terminate_TOU = true;
    WaitForSingleObject(hTOU, INFINITE);


    // Close process and thread handles. 
  CloseHandle(pi.hProcess);
  CloseHandle(pi.hThread);
    CloseHandle(hHasMsg);
    CloseHandle(hHasPosition);
    CloseHandle(hBufferLockStatus);
    CloseHandle(hTimer);

    return 0;
}

J'ai commenté presque tout ce code et le processus de création fonctionne correctement. Lorsque j’ai laissé plus d’un objet noyau, le programme s’arrête de fonctionner et Windows Vista affiche le message "Ce programme s’arrête de s’exécuter ...". L’autre processus a juste un cout qui dit quelque chose ...

Je voudrais savoir ce qui ne va pas avec mon code. Cordialement, Leandro Lima

Answer 1

Utilisez zeromemory ou memset et initialisez votre ProcessInfo et votre StartupInfo

Ceci est la déclaration d'un pointeur sur une information de démarrage. struct déclare la structure et la transmet par référence     LPSTARTUPINFOA si

set si.cb = sizeof (STARTUPINFO)

Quelque chose comme ça

PROCESS_INFORMATION PI;
STARTUPINFO SI;   
SI.dwFlags =  STARTF_USESTDHANDLES;
SI.cb = sizeof(STARTUPINFO);
char * sCommandLine = _strdup(sCommand.c_str());
if(!CreateProcess(NULL,sCommandLine,NULL,NULL,true,CREATE_NO_WINDOW,NULL,NULL,&SI,&PI))

Answer 2

Vous passez un pointeur non initialisé vers une structure STARTUPINFO. Vous devez déclarer une structure STARTUPINFO, initialiser ses champs et lui transmettre un pointeur.