logo
Tags down

shadow

How do I solve this memory leak


By : Tatiana kovalenko
Date : September 22 2020, 08:00 PM
I wish did fix the issue. Your code assumes in vector::reserve(int n) that arr is null.
Instead maybe spilt up how reserve functions based on whether or not arr is null.
code :
void vector::reserve(int n) {
    if (arr) { //handle case when arr is null
        space += n;
        arr = new int[space];
        //no need to copy anything!
    } else { //handle case when arr is not null
        int* tmp(new int[space + n]);
        for(int i = 0; i < space; i++) {
            tmp[i] = arr[i];
        }
        delete[] arr;
        arr = tmp;
        space += n;
    }
}


Share : facebook icon twitter icon

How to solve a memory leak


By : user5640551
Date : March 29 2020, 07:55 AM
wish help you to fix your issue If you are not using ARC.
Whenever you return an object from method, Return an autoreleased object:
code :
return [dataViewController autorelease];

How to solve memory leak in Yii framework or PHP, aside from setting the directive of memory limit?


By : cfries
Date : March 29 2020, 07:55 AM
Hope this helps It's better to avoid using CActiveRecord instances when processing lot's of data, each instance will use addional memory, using plain arrays can help. Also you need to query data in chunks as follows:
code :
class ImportCommand extends CConsoleCommand
{
  public function run($args)
  {
      $db  = Yii::app()->db;

      $limit     = 1000;  
      $totalRows = $db->createCommand()
                      ->from("users")
                      ->select("count(*)")->queryScalar();

      $n = ceil($totalRows / $limit);
      $k = 0;

      // $fp = fopen(...)

      for($i = 0; $i < $n ; $i++)
      {
          $offset = $i*$limit;
          $list  = $db->createCommand()->from("users")
                   ->offset($offset)
                   ->limit($limit)->queryAll();

          foreach($list as $user)
          {
              //process $user here
          }
      }
      // fclose($fp)
  }
}

Memory Leak Cant Solve it C++


By : TimothyWalsh
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further You should call free in your function, to release the memory you allocated with malloc (and re-allocated with realloc).
The problem is that you have several exit points in your function, so you should pay attention to release memory at each exit point.
code :
auto buffer = std::make_unique< BYTE[] >(bufferSize);

Memory Leak, but how can I pass a different context than the one of the activity to solve the Leak?


By : user2115191
Date : March 29 2020, 07:55 AM
will help you CommonsWare's answer resolves the first cause of the Activity memory leak, and was a great help in tracking down the second one.
The second cause is that FingerprintManager holds a strong reference to the callback object in FingerprintManager.mAuthenticationCallback and doesn't release it until a different callback object is provided by another authenticate() call.
code :
public static FingerprintManager.AuthenticationCallback EmptyAuthenticationCallback;
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
    App.EmptyAuthenticationCallback = new FingerprintManager.AuthenticationCallback() {};
}
private void clearCallbackReference() {
    final String methodName = "clearCallbackReference()";
    // FingerprintManager holds a strong reference to the callback
    //   which in turn holds a strong reference to the Activity
    //   and thus causes the Activity to be leaked.
    // This is a known bug in the FingerprintManager class.
    //   http://code.google.com/p/android/issues/detail?id=215512
    // And the CancellationSignal object does not clear the callback reference either.
    //
    // To clear it we call authenticate() again and give it a new callback
    //   (created in the application context instead of the Activity context),
    //   and then immediately "fail" the authenticate() call
    //   since we aren't wanting another fingerprint from the user.
    try {
        Log.d(TAG, methodName);
        fingerprintManager.authenticate(null, null, 0, App.EmptyAuthenticationCallback, null);
        App.EmptyAuthenticationCallback.onAuthenticationFailed();
    }
    catch (Exception ex) {
        // Handle the exception..
    }
}
@Override
public void onAuthenticationSucceeded(FingerprintManager.AuthenticationResult result) {
    final String methodName = "onAuthenticationSucceeded()";
    try {
        Log.d(TAG, methodName + ": Authentication succeeded for Action '" + action + "'.");
        super.onAuthenticationSucceeded(result);
        // Do your custom actions here if needed.
    }
    catch (Exception ex) {
        // Handle the exception..
    }
    finally {
        clearCallbackReference();
    }
}
finally {
    if (errMsgId != 5 || (canceler != null && canceler.isCanceled()))
        clearCallbackReference();
}

window closed event doesn't release memory and resource. How to solve the memory leak in WPF?


By : Xi Rao
Date : March 29 2020, 07:55 AM
I wish this help you I have had a simillar problem while using WindowsFormsHost for PictureBox control. The WPF window using WF PictureBox control could not be fully released and that's why i had a regular ~10mb increase everytime i re-opened the subwindow. The problem was solved since i started nulling the WFH object on WPF window closing. Just make sure You clear all the WF controls if You use such.
Related Posts Related Posts :
  • Access captured variables outside the lambda
  • Storing 4 values from each line from a txt file, into an object - C++
  • What is the most efficient way to test for duplicates in a user inputted array?
  • How to find a string in a binary file?
  • Passing variable into lambda
  • decltype(auto) function return type does not deduce && types
  • Find the unique elements of a vector C++
  • Why doesn't str != "hello" && "goodbye" work?
  • Array rotate and delete
  • Is the concept of release-sequence useful in practice?
  • Multiple spotlights in opengl doesn't work
  • The for loop isn't entered even if the initial requirement is true
  • Function is called twice from the same thread for the same object with the same call stack
  • Filling char pointer correctly
  • How Base class members gets copied in inheritance when we copy/assign derived class objects?
  • call method from a function pointer
  • Is it common to declare const pointers in C++?
  • How to check whether new threads created inside third party DLL in visual c++ application
  • I cannot convert a '2D array whit bool' to a 'void 2D array bool'(for game of life)
  • How to send variables between classes in Qt
  • What are the similarities and differences between C++'s concepts and Rust's traits?
  • Variadic templates in C++ 11 and class constructors
  • getting segmentation fault when copying arrays using std::copy
  • std::cout is decreasing CPU Usage?
  • Trying to use find_if function to locate value in vector of pairs by first element
  • Lottery simulator is returning garbage values and not the users lotto numbers and the winning numbers
  • error: expression must have integral or unscoped enum type when incrementally filling in vectors
  • auto fail to deduce correct return type
  • Pass string or wstring in a function
  • Is there a way to get some function called on every thread that gets created?
  • How can I enforce two function parameters have the same template type?
  • Using strcpy_s() and strcat_s() with dynamically allocated strings
  • Tensorflow Lite arm64 error: cannot convert ‘const int8x8_t?
  • How to pass `this` pointer from outer class to a member structure?
  • Storing integers values from file into a vectors of vector
  • Why `static` functions in different TUs do not break the ODR?
  • Base class and templates
  • boost::asio allow non-blocking accept of new connections while handler for connection is blocking
  • How to write custom comparator for std::minmax function for datatype vector<glm::vec3> (opengl datatype)
  • Confused about * and & with pointers
  • What's the value in memory?
  • Qt - How to handle memory management for dialogs?
  • Why am I having trouble compiling a templated class?
  • Understanding which method will be invoked
  • Why does bool casting is called?
  • Insert string at linking time
  • How to use a C++ lambda to convert a member function pointer to a normal function pointer for use as a callback
  • Is the Intel C++ Compiler (19.0) now only using the Clang front-end (i.e. already abandoned EDG)?
  • Why does deleting the move constructor cause a compile error?
  • How can I make sure my random number between 0 and 1 generated by rand is not 0?
  • How will I pass ranges instead of iterator-pairs in C++20?
  • Use std::optional as a regular pointer vs use has_value() and value
  • How to interlace string with one character?
  • Derived class from Template argument doesn't have protected member access
  • Parallel For Loops: Find if a sorted array contains duplicate elements
  • Casting a reference to a base class: standard behaviour?
  • How to check dllmain function is returning false
  • How to update the attributes of an object?
  • How do I extract an integer in a string?
  • Why code give segmentation fault on inputs greater than 10?
  • shadow
    Privacy Policy - Terms - Contact Us © 35dp-dentalpractice.co.uk