The best explanation I’ve seen is in Chapter 7 of the free Foundations of Programming e-book. Basically, in .NET a memory leak occurs when referenced objects are rooted and thus cannot be garbage collected. This occurs accidentally when you hold on to references beyond the intended scope. You’ll know that you have leaks when you … Read more
The cause is simple to explain: while an event handler is subscribed, the publisher of the event holds a reference to the subscriber via the event handler delegate (assuming the delegate is an instance method). If the publisher lives longer than the subscriber, then it will keep the subscriber alive even when there are no … Read more
Here’s what Oracle’s documentation has to say: By default the heap dump is created in a file called java_pid.hprof in the working directory of the VM, as in the example above. You can specify an alternative file name or directory with the -XX:HeapDumpPath= option. For example -XX:HeapDumpPath=/disk2/dumps will cause the heap dump to be generated … Read more
Event listeners First off it’s important to understand that there are two kinds of “event listeners”: Scope event listeners registered via $on: $scope.$on(‘anEvent’, function (event, data) { … }); Event handlers attached to elements via for example on or bind: element.on(‘click’, function (event) { … }); $scope.$destroy() When $scope.$destroy() is executed it will remove all … Read more
As jakobengblom2 pointed out, valgrind has a suit of tools. Depending which one you are talking about there are different windows counter parts. I will only mention OSS or free tools here. 1. MemCheck: Dr. Memory. It is a relatively new tool, works very well on Windows 7. My favorite feature is that it groups … Read more
Have a look at this article: Tracing python memory leaks Also, note that the garbage collection module actually can have debug flags set. Look at the set_debug function. Additionally, look at this code by Gnibbler for determining the types of objects that have been created after a call.
Instructions Things You’ll Need Proficiency in C++ C++ compiler Debugger and other investigative software tools 1 Understand the operator basics. The C++ operator new allocates heap memory. The delete operator frees heap memory. For every new, you should use a delete so that you free the same memory you allocated: char* str = new char … Read more
The primary memory-related problem you’ll still need to be aware of is retain cycles. This occurs when one object has a strong pointer to another, but the target object has a strong pointer back to the original. Even when all other references to these objects are removed, they still will hold on to one another … Read more
No. As professionals, the question we should not be asking ourselves is, “Is it ever OK to do this?” but rather “Is there ever a good reason to do this?” And “hunting down that memory leak is a pain” isn’t a good reason. I like to keep things simple. And the simple rule is that … Read more
If IncomingHandler class is not static, it will have a reference to your Service object. Handler objects for the same thread all share a common Looper object, which they post messages to and read from. As messages contain target Handler, as long as there are messages with target handler in the message queue, the handler … Read more