What you are seeing is a known bug in iOS 5.1 and is being discussed in the iOS Developer Forums as such. You can find the relevant thread by searching in the forums for “strdup”. See the thread titled “Elements App Memory Leak”. Search for the post from an Apple employee.
Accessing a deallocated object is not the only reason you would get EXC_BAD_ACCESS. Other causes of bad access errors include accessing nil pointers and going past the bounds of an array. Looking at your screenshots, you are not using a deallocated object. If you were using a deallocated object, the Zombies template in Instruments would … Read more
Okay I think I got it working. Here are some more details about how to remove xcode command line authorization prompt What I did was the following: Mark jenkins user as admin (unfortunately it seems that there is no other way atm) Go to /etc/authorization search for key system.privilige.taskport change value of allow-root to true … Read more
The ObjectAlloc tool is designed to graph total object allocation over time, and it doesn’t take deallocations into account. Essentially: it will always go up. What you can do is look at the Net Bytes and # Net columns. These columns will adjust based on the number of objects you deallocate, and if you’re concerned … Read more
The Tiler Utilization and Renderer Utilization percentages measure the duty cycle of the vertex and fragment processing hardware, respectively. On the MBX, Tiler Utilization typically scales with the amount of vertex data being sent to the GPU (in terms of both the number of vertices and the size of the attributes sent per-vertex), and Fragment … Read more
To answer the whys, profiling memory usage is especially important for iOS apps because iPhones and iPads have much less RAM than Macs. The iPhone 4 has 512 MB of RAM, but earlier versions had 256 or 128 MB. Factor in the RAM the OS uses and multitasking, and your app doesn’t have much RAM … Read more
I Changed my project settings to not include the dSYM file while building: Changing it to include the dSYM File helped the profiler desymbolize the symbols and fixed my issue:
Alright, so to answer the main question: The data in the .zip archive is a blob of data that was serialized with the NSArchiver class (they have a fairly distinctive header when being opened with a hex tool (I used hex fiend), so that was the first clue). It’s fairly straight forward to read, all … Read more
You can use the Allocations instrument to track the lifecycle of your objects. If you use the “Allocations” template, it is configured to record malloc and free events. You may want to configure it to also record retain, release, and autorelease events by turning on the “Record reference counts” checkbox in the Allocations instrument settings: … Read more
instruments -t /Developer/Platforms/iPhoneOS.platform/Developer/Library/Instruments/\ PlugIns/AutomationInstrument.bundle/Contents/Resources/Automation.tracetemplate \ <full_path_to_application> -e UIASCRIPT <path_to_script.js> \ -e UIARESULTSPATH <output_results_path> for xcode >= 4.5 instruments -t /Applications/Xcode.app/Contents/Applications/Instruments.app/Contents/PlugIns/\ AutomationInstrument.bundle/Contents/Resources/Automation.tracetemplate \ <full_path_to_application> -e UIASCRIPT <path_to_script.js> \ -e UIARESULTSPATH <output_results_path> for xcode >= 6.1 instruments -w <device ID> -t \ /Applications/Xcode.app/Contents/Applications/Instruments.app/Contents/PlugIns/\ AutomationInstrument.xrplugin/Contents/Resources/Automation.tracetemplate \ <full_path_to_application> -e UIASCRIPT <path_to_script.js> \ -e UIARESULTSPATH <output_results_path> There a few important … Read more