Trace Objective-C methods

If you are using Objective-C, you can log trace information on specific methods in your code to measure performance using the following macros:

MINT_METHOD_TRACE_START: Starts the method trace.

MINT_METHOD_TRACE_STOP: Stops the method trace.

MINT_NONARC_METHOD_TRACE_STOP: Stops the method trace. Use this macro if you are not using ARC.

Note  You cannot use this feature with Swift, which does not support macros.

Start and stop the trace just once in a given method, as follows:

// Objective-C
- (void)test {
    MINT_METHOD_TRACE_START
    
    NSLog(@"Hello, World");
    
    MINT_METHOD_TRACE_STOP
}

Then, run a search in Splunk Web on the "mint:methodinvocation" sourcetype to view trace information and performance metrics, for example:

index=mint sourcetype="mint:methodinvocation" | head 5

The following fields contain trace information:

• threadID: The thread ID.
• method: The method that was traced.
• elapsedTime: The elapsed time between starting and stopping the method trace, in nanoseconds.

Here's an example result:

 {
   apiKey: 12345
   appEnvironment: Testing
   appRunningState: Foreground
   appVersionCode: 1
   appVersionName: 1.0
   batteryLevel: -100
   carrier: NA
   connection: WIFI
   currentView: GHUnitIOSViewController
   device: x86_64
   elapsedTime: 52077306
   extraData: {
   }
   locale: US
   method: -[SplunkiOSTests testMethodTrace]
   msFromStart: 1679
   osVersion: 9.2
   packageName: SplunkTests
   platform: iOS
   remoteIP: 204.107.141.240
   screenOrientation: Portrait
   sdkVersion: 5.0.0
   session_id: 83B0BFA2-D224-4EE8-B65F-1A9C6A2A790A
   state: CONNECTED
   threadID: 19207
   transactions: {
   }
   userIdentifier: NA
   uuid: fake_uid
}