Crash Reporter for IOS not working.

 static void UncaughtExceptionHandler(NSException *exception) {
     NSLog(@"Uncaught exception: %@: %@\n%@", [exception name], [exception reason], [exception callStackSymbols]);
     if (gsCrashReporterUEHandler)
         gsCrashReporterUEHandler(exception);
 }
 
 
 static void InitObjCUEHandler()
 {
     // Crash reporter sets its own handler, so we have to save it and call it manually
     gsCrashReporterUEHandler = NSGetUncaughtExceptionHandler();
     NSSetUncaughtExceptionHandler(&UncaughtExceptionHandler);
 }
 
 
 void InitCrashHandling()
 {
 #if ENABLE_CUSTOM_CRASH_REPORTER
     InitCrashReporter();
 #endif
 
 #if ENABLE_OBJC_UNCAUGHT_EXCEPTION_HANDLER
     InitObjCUEHandler();
 #endif
 }
 
 // This function will be called when AppDomain.CurrentDomain.UnhandledException event is triggered.
 // When running on device the app will do a hard crash and it will generate a crash log.
 void CrashedCheckBellowForHintsWhy()
 {
 #if ENABLE_CRASH_REPORT_SUBMISSION
     // Wait if app has crashed before we were able to submit an older pending crash report. This
     // could happen if app crashes at startup.
     WaitWhileCrashReportsAreSent();
 #endif
     
 #if ENABLE_IOS_CRASH_REPORTING || ENABLE_CUSTOM_CRASH_REPORTER
     
     // Make app crash hard here
     __builtin_trap();
     
     // Just in case above doesn't work
     abort();
     
 #endif
 }

Above is a piece of code from my crashreporter.mm

 #define ENABLE_IOS_CRASH_REPORTING 1
 #define ENABLE_OBJC_UNCAUGHT_EXCEPTION_HANDLER 1
 #define ENABLE_CUSTOM_CRASH_REPORTER 1
 #define ENABLE_CRASH_REPORT_SUBMISSION 0

 #if ENABLE_CRASH_REPORT_SUBMISSION && !ENABLE_CUSTOM_CRASH_REPORTER
     #undef ENABLE_CUSTOM_CRASH_REPORTER
     #define ENABLE_CUSTOM_CRASH_REPORTER 1
 #endif

Above is whats on my crashreporter.h

Player Settings -> Script Optimization = Fast but no exception

I'm using Unity Pro

When i force a crash on unity and check my CrashReport.reports on unity i dont get any report. i also put a breakpoint on xcode crashreporter.mm -> UncaughtExceptionHandler (), it doesn't go there whenever there is a crash. crashreporter.mm -> CrashedCheckBellowForHintsWhy () is the only function called inside crashreporter.mm when a crash happens.

Please help me on how i could make crash reporter work. I've done various work around to get my game's unhandled exception info but nothing works unless i set script optimization to Slow but safe and use Application.RegisterLogCallBack instead but that would mean sacrificing performance.