[llvm-dev] [XRay][RFC] Tooling for XRay Trace Analysis

Dean Michael Berris via llvm-dev llvm-dev at lists.llvm.org
Thu Sep 8 23:34:21 PDT 2016

> On 9 Sep 2016, at 12:35, Dean Michael Berris <dean.berris at gmail.com> wrote:
>> On 7 Sep 2016, at 01:21, David Blaikie <dblaikie at gmail.com> wrote:
>> But I take it you mean (as detailed later) to have a separate format (could be a portable binary format, but currently discussing it as JSON/YAML/etc) that things are converted from that makes them portable?

One thing worth mentioning on this regard is maybe we can use Flatbuffers (https://google.github.io/flatbuffers/) for the XRay log.

Flatbuffers is Apache 2 licensed though, and if we're going to use it in compiler-rt, whether that raises issues if embedded in other people's applications.

This might potentially get us around the non-sharing of code if we're able to keep the flatbuffer definitions in sync at least across compiler-rt and LLVM. Also, it might be useful to use flatbuffers for other things in LLVM as well so that might be something worth exploring (the bit code comes to mind, somehow being discussed on IRC recently).

I am not a lawyer nor do I play one on the Internet, so I'll let Danny Berlin chime in on this one on whether/how we can use Flatbuffers for XRay.

-- Dean

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