The following code snippet illustrates a memory leak when opening XPS files. If you run it and watch the task manager, it will grow and not release memory until the app exits. '** Console application BEGINS. Module Main Const DefaultTestFilePath As String = "D:\Test.xps" Const DefaultLoopRuns As Integer = 1000 Public Sub ...
I could use some advice on tracking down the cause of memory leaks in C#. I understand what is a memory leak and I get why they occur in C# but I'm wondering what tools/strategies have you used in the past to resolve them? I am using .NET Memory Profiler and I've found that one of my huge main objects is staying in memory after I close ...
I've just started experimenting with SDL in C++, and I thought checking for memory leaks regularly may be a good habit to form early on. With this in mind, I've been running my 'Hello world' programs through Valgrind to catch any leaks, and although I've removed everything except the most basic SDL_Init() and SDL_Quit() statements, Val...
I have the following code: MemoryStream foo(){ MemoryStream ms = new MemoryStream(); // write stuff to ms return ms; } void bar(){ MemoryStream ms2 = foo(); // do stuff with ms2 return; } Is there any chance that the MemoryStream that I've allocated will somehow fail to be disposed of later? I've got a peer...
Does anyone know of a better GUI client for displaying Windows System Monitor log files? (System Monitor is sometimes called Performance Monitor.) I'm trying to track a long-term memory leak in a C# application running on Windows XP or 2K3 by comparing memory usages to run logs. Specifically I want a client that will allow me to see the...
I have a PHP class that creates a PNG image on the fly and sends it to browser. PHP manual says that I need to make sure that imagedestroy function is called at end to release the memory. Now, if I weren't using a class, I would have some code like this: function shutdown_func() { global $img; if ($img) imagedestroy($im...
Whilst investigating a memory leak I discovered that it was caused by calling NewRow() on a Table inside a loop many times. However the DataRow created was never added to the Table Rows collection and the Table Rows Count never got above zero. My question is why does this use up more memory every time NewRow is called even though the ne...
I'm launching a Weblogic application inside Eclipse via the BEA Weblogic Server v9.2 runtime environment. If this were running straight from the command-line, I'd do a ctrl-BREAK to force a thread dump. Is there a way to do it in Eclipse? ...
I have a managed dll that calls into a native library. This native library generally returns IntPtrs. These can be passed in to other methods in the native library to do things, or to tell the library to free the instance associated with the IntPtr. But only some of the instances need to freed in this way, others are managed by the li...
I have an method which save files to the internet, it works but just slow. Then I'd like to make the user interface more smooth, so I create an NSThread to handle the slow task. I am seeing a list of errors like: _NSAutoreleaseNoPool(): Object 0x18a140 of class NSCFString autoreleased with no pool in place - just leaking Without NST...
What do you keep on mind to avoid memory leaks when you write thousands lines of .NET code? I'm a big fan of prevention over inspection , there is a famous example regarding this point which is using a "StringBuilder" to combine strings instead of "String1+String2", so what is else out there from your coding experience? thanks in advan...
I'm trying to use mtrace to detect memory leaks in a fortran program. I'm using the gfortran compiler. See the wikipedia entry for a (working) C example of mtrace: http://en.wikipedia.org/wiki/Mtrace I tried both ways, i.e. wrapping the mtrace() and muntrace() and call them from the fortran program, as well as create a C program which ...
If I declare a temporary auto deleted character buffer using std::auto_ptr<char> buffer(new char[n]); then the buffer is automatically deleted when the buffer goes out of scope. I would assume that the buffer is deleted using delete. However the buffer was created using new[], and so strictly speaking the buffer should be deleted usi...
Hey, I am trying to create wrapper functions for free and malloc in C to help notify me of memory leaks. Does anyone know how to declare these functions so when I call malloc() and free() it will call my custom functions and not the standards lib functions? ...
In C# which is more memory efficient: Option #1 or Option #2? public void TestStringBuilder() { //potentially a collection with several hundred items: string[] outputStrings = new string[] { "test1", "test2", "test3" }; //Option #1 StringBuilder formattedOutput = new StringBuilder(); foreach (string outputString in ...
The code is rather long yet simple: 100 leaky JavaScript objects are created. 10 leaky elements are created from the JS objects. 1 element is removed and 1 is added 10000 times. I assume that the detachEvent call is not functioning properly. Also, if you change this.eventParams from an array to a simple variable, the leak goes away. ...
I was reading Java Platform Performance and section A.3.3 worried me. I had been working on the assumption that a variable that dropped out of scope would no longer be considered a GC root, but this paper appears to contradict that. Do recent JVMs, in particular Sun's 1.6.0_07 version, still have this limitation? If so, then I have a l...
After upgrading a project from Delphi 2007 to Delphi 2009 I'm getting an Unknown memory leak, so far I've been tryin to track it down using fastMM, here is what fastMM stack trace reports: A memory block has been leaked. The size is: 20 This block was allocated by thread 0x111C, and the stack trace (return addresses) at the time was...
Is it ever acceptable to have a memory leak in your C or C++ application? What if you allocate some memory and use it until the very last line of code in your application (for example, a global object's deconstructor)? As long as the memory consumption doesn't grow over time, is it OK to trust the OS to free your memory for you when you...
I am working on a web application that is designed to display a bunch of data that is updated periodically with AJAX. The general usage scenario would be that a user would leave it open all day and take a glance at it now and then. I am encountering a problem where the browsers memory footprint is growing slowly over time. This is h...