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I would like add some kind of marker or even force instruments to pause when execution reaches a specific line in the code. Is this possible?

rmaddy
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techsMex
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    Yes with DTrace, you can set flags with code. See this [SO answer](http://stackoverflow.com/a/20272256/451475). It seems this is broken in iOS7 simulator, possibly fixed in iOS8. I used this on OSX. – zaph Aug 13 '14 at 18:17

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You can use sign_posts using Xcode's new kdebug_signpost command. See the SO post at: https://stackoverflow.com/a/39416673/1179897

Shaheen Ghiassy
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