![]() ![]() It's much harder to leak in ARC because of a simple "oh, I forgot to release. It's incredibly easy to leak in non-ARC code with a simple omitted release or autorelease (though, admittedly, the above links will help you find them). ![]() If you're worried about leaks, using ARC is (IMHO) one of the easiest way to eliminate many mundane leaks. That way, you'll see a message on your console when the object is deallocated. if non-ARC, remember to include the following line, too: If you're wondering if some object is being deallocated properly, it's useful to add a diagnostic dealloc implementation to your object that should be released: - _FUNCTION_) See iOS app with ARC, find who is owner of an object At that point, it's sometimes useful to use the Allocations tool in Instruments, highlight some allocation that you suspect should have been freed but wasn't, and it will show you what allocated that memory. Sometimes for strong reference cycles, it won't always be flagged by the Leaks tool in instruments. The Finding Leaks in Your App discussion in the Instruments User Guide. In terms of finding leaks, the standard tools all work fine:Įspecially if doing non-ARC code, the static analyzer ( shift+ command+ B or choose "Analyze" from the "Product" menu) is very useful. That's a function of your choice of ARC v MRC and whether you've avoided retain cycles and, if doing MRC, whether you've included the necessary release statements. The fact that one uses blocks has no bearing on whether the code leaks or not. The blocks retain the objects they reference (unless the object is qualified, such as with _block in MRC or with _weak in ARC). If you're putting blocks in blocks, that's doesn't introduce any additional leak risks (unless you concoct some circular set of references that causes a strong reference cycle, which is generally unlikely when doing blocks within blocks). If you remember that blocks maintain strong references to objects they reference, then just follow the standard basic rules of memory management.Īs discussed in the Use Lifetime Qualifiers to Avoid Strong Reference Cycles, in MRC you can use the _block qualifier to solve these strong reference cycles, but in ARC, you can use the _weak qualifier. Unblocking accidentally blocked program « Reply 6 on: October 09, 2011, 02:56:12 AM » Go to Firewall > Application rules > Choose the manufacturer > Delete the rule (right clicking it). Other than retain cycles (also known as strong reference cycles in ARC) caused if you fail to Avoid Strong Reference Cycles when Capturing self), there really aren't other special leaking risks associated with blocks. Via the drop down, you can decide if the rule should match any combo of the process, the persistence file, and persistence item.Īll alert responses, are logged to: /Library/Objective-See/BlockBlock/ answer: Blocks don't inherently introduce any special leak issues (other than retain cycles in special circumstances, described below). The 'rule scope' option allow you inform how to apply the rule. If you decide to block an item, BlockBlock will remove the item from the file system, blocking the persistence. Both actions will create a rule to remember your selection (unless you selected the 'temporarily' checkbox). If the process and the persisted item is trusted, simply click 'Allow'. The alert shows both the file that was modified to achieve persistence as well as the persistent item that was added. There are also clickable elements on the alert to show the process's code signing information, VirusTotal detections, and process ancestry. The alerts contains the process name, pid, path, and arguments. If anything installs a persistent piece of software, BlockBlock aims to detect this and will display an informative alert: Once installed, BlockBlock will begin running and will be automatically started any time your computer is restarted, thus providing continual protection. ![]()
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