Xcode symbol file location
Ensure that your application is built with debug flags enabled.
The file should be in your library folder:
~/Library/Developer/Xcode/DerivedData/<weird-app-identifier>/Build/Products/Debug-iphoneos
Inside this folder, there will be a .dSYM bundle folder which contains the symbol file further inside Contents/Resources/.
You can also generate a .dSYM bundle file by running dsymutil on a binary/library.