iprofiler (Instruments command line) authorization failure

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Created Dec ’17

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Hey all,

I am working with Xcode 9.2 on both High Sierra and Sierra machines. I am trying to use (for the first time) the iprofiler command line tool to record an instruments trace of my process. But I'm getting an authorization error at startup that I am finding hard to troubleshoot. Just to make sure it wasn't my app, I switched the iprofiler command line to run /bin/ls and still had problems. I also tried with sudo in case that was an issue and it didn't help.

machine:~ user$ iprofiler -systemtrace /bin/ls

iprofiler error: DTPerformanceSession: Authorization failure.

machine:~ user$ sudo iprofiler -systemtrace /bin/ls

iprofiler error: DTPerformanceSession: Authorization failure.

Any ideas on where to look to figure out what is going on here?

Thanks!

Matthew

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Answer 1

ajr225 OP

Dec ’17

I am experiencing the same problem, both on Sierra, and now High Sierra installations. I previously used the `iprofiler` command regularly without problems. As far as I know, I made no other configuration changes except upgrading the OS.

I just found this blog (in non-english script) that seems to have a solution:

http://watson.hatenablog.com/entry/2017/10/03/235305

It appears that now instead of `iprofiler`, we should use a call to `instruments`. This appears to work, although I'm not sure how all of the arguments translate.

Good luck!

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Answer 2

kix.mdouglass OP

Dec ’17

I tried using `instruments` but unfortunately that launches the GUI tool. The app I'm trying to profile is a command-line based tool and needs to be able to be sent data via stdin/stdout which `instruments` doesn't seem to support.

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