GetProcessDEPPolicy錯誤87

Question

當我嘗試檢查某個進程是否正在使用數據執行保護（DEP）時，出現錯誤87（INVALID_PARAMETER）。 我檢查了我的代碼，這似乎還可以，但是不幸的是我仍然遇到相同的錯誤。

碼：

BOOL var = true;
DWORD dwPolicy;

HANDLE hProc = OpenProcess(PROCESS_QUERY_INFORMATION, false, 3624);
if (hProc == NULL) {
    cout << "Can't open Process because of the error " << GetLastError() << endl;
}

if (GetProcessDEPPolicy(hProc, &dwPolicy, 0) != FALSE) {
    if (dwPolicy == PROCESS_DEP_ENABLE) {
        cout << "For try.exe process data execution prevention is enabled" << endl;

    }
    else if (dwPolicy == NULL) {
        cout << "For try.exe process data execution prevention is disabled" << endl;
    }
    else {
        cout << "Data is thrunked and we can't change DEP value in future" << endl;
    }
}
else {
    cout << "There was an error with discovering DEP in try.exe process because of "<<GetLastError() << endl;
}

編譯並執行后，我得到：

There was an error with discovering DEP in try.exe process because of 87

Answer 1

在文檔中，定義了GetProcessDEPPolicy函數：

BOOL WINAPI GetProcessDEPPolicy(
  _In_  HANDLE  hProcess,
  _Out_ LPDWORD lpFlags,
  _Out_ PBOOL   lpPermanent
);

請注意，最后一個參數是out參數，它不是可選參數，但是您要傳遞0 aka NULL 。 該電話應為：

BOOL permanent = FALSE;
if (GetProcessDEPPolicy(hProc, &dwPolicy, &permanent) != FALSE) {