ARM CoreSight Tracing

[Manouchehri]

Similar to Intel PT, ARM has a feature called CoreSight Tracing. I'm not sure how useful it would be to honggfuzz, but I thought I'd mention it and see if anyone else is interested.

• Using the OpenCSD library with perf - https://github.com/Linaro/OpenCSD/blob/arm-dev/HOWTO.md
• Python Based ARM CoreSight Debug and Trace Tools - https://github.com/deadsy/pycs

[robertswiecki]

I played a bit with CoreSight on Raspberry PI and it doesn't seem to be in usable state. Kernel and perf patches are needed to make it work (OpenCSD). I think we'll have to wait some time to make them into the mainline kernel.

[rpw]

The Raspberry Pi is not suitable hardware since Broadcom does not expose the ETM Macrocell in the device tree. Try a Dragonboard 410c with Linaro 17.06 -- this gets you a Linux 4.9 kernel that exposes CoreSight tracing through the perf subsystem.

Might be able to contribute a patch for this.

[Manouchehri]

https://youtu.be/xX-B7tW7E_8

Might be relevant for anyone still interested. 🙂