When unzipped an ipa file, I found some *.symbols files in the ./Symbols folder:Symbols
├── 0622D177-3DDB-317B-B4C7-08BEC26BEB0D.symbols
├── 2E37B62A-0764-3C92-876E-A83744355E71.symbols
├── 39208D90-C91E-3F4F-8162-C19B4E4037CE.symbols
├── 396D29A9-8DCA-3A77-8B64-F2B57030D5DA.symbols
├── 48A24338-2A05-39FA-B767-75162FEF155E.symbols
├── 522D51C3-6B15-3D61-B6EF-2EFB0D95776D.symbols
├── 5CFF80E9-E21B-3329-B55C-E6362DAA9200.symbols
└── 83E736C8-05C6-36D9-970C-E2B7328DF09A.symbolsIt seems the file name of the *.symbols files are the same as the dsym file. What are the symbols files? And what is the difference between *.symbols files and dsym?
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We found many C++ exceotion crash cases increase quickly in our app recent days, which related to CoreAnalytics in iOS 13 and named "std::bad_alloc".
From the crash report, we suspected that some JSON files, downloaded by CoreAnalytics when use MapKit caused some crashed when C++ handle it.
Has someone met the same crash? And did apple update some files about CoreAnalytics recent days?
Crash report 1
Crash Report 2
I add a GCD Performance track in my instruments target and get some GCD Perf Event, such as "Mutable Target", "Delayed Registration", and "9".
How many GCD Perf Events and what do these events mean?