iOS broadcast memory leak

Question

I am testing ReplayKit broadcast extension with instruments. I fixed some leaks on my extension, but some of leaks happens on Framework side and I cannot find a way to resolve. Anyone knows how to fix? It leaks 48Kbyte every .5 sec.

I checked History of the memory address. Retain delta is +0. Retain and Release is well paired including these functions,

[_NSPlaceholderData initWithBytes:length:copy:deallocator:]
[NSXPCDecoder _decodeArrayOfObjectsForKey:]_block_invoke  
[RPBroadcastSampleHandler _processPayloadWithAudioSample:type:]_block_invoke
[RPBroadcastSampleHandler _audioBufferListFromData:]

My processSampleBuffer() returns immediately for testing. So leak is not happens my processSampleBuffer().

Screenshot of Xcode instruments

Answer 1

This stack log is taken by Zombies instruments. Zombies changes debuggee's behavior of autorelease(), it keep the auto-released object.

By comparing Zombies instruments result with Allocations instruments result, I found the auto-released object is freed on Allocations. So memory leak is not happens on the object.