[llvm-dev] [Xray] Help with Xray (original) (raw)

Dangeti Tharun kumar via llvm-dev llvm-dev at lists.llvm.org
Mon Jan 7 05:32:55 PST 2019

On Mon, Jan 7, 2019 at 5:17 PM Dean Michael Berris <dean.berris at gmail.com> wrote:

On Mon, Jan 7, 2019 at 10:26 PM Dangeti Tharun kumar <cs15mtech11002 at iith.ac.in> wrote: > > > > On Mon, Jan 7, 2019 at 3:21 PM Dean Michael Berris <_ _dean.berris at gmail.com> wrote: >> >> On Mon, Jan 7, 2019 at 8:43 PM Dangeti Tharun kumar >> <cs15mtech11002 at iith.ac.in> wrote: >> > >> > Hi Dean, >> > >> > I have tried with -instr-map-1 and -instr-map-2, it didn't work. >> > >> >> Yeah, I'm looking through the code and it looks like we're always just >> using the function id when we should be using the symbol name. Let me >> land a patch to fix this. > > > Thanks Dean. > >> > Is there a way to find the function name from the identifier? >> >> You can try this manually by using the llvm-xray extract -symbolize >> tool to get a YAML file that maps the function id's to symbols, but >> that's a roundabout way of doing it. Ideally the graph-diff tool >> should just do it. >> > I have tried this strangely I got this error > > $> llvm-xray extract -symbolize xray-log.clang-8.* > > YAML:1:1: error: Got empty plain scalar > llvm-xray: Cannot extract instrumentation map from 'xray-log.clang-8.*' > Failed loading YAML document from 'xray-log.clang-8.* >

Sorry, that was unclear -- you can extract the instrumentation map from an XRay-instrumented binary, not the traces. > but this is working > > llvm-xray convert xray-log.clang-8.* -instrmap=../avx/llvm/xray-build/bin/clang -output-format=yaml 1>out.yaml > > Am I missing anything? > Nope, my instructions were unclear. :) I've uploaded a patch which should make this work -- if you're able to build the tool(s) with the patch applied, then it would be great to hear your feedback: https://reviews.llvm.org/D56383 Thanks for your prompt response. I have applied the patch. Unfortunately, it did not solve the problem, I am still seeing function ids.

I'm going to need to come up with test-cases locally to ensure that

this doesn't regress (and that it works as expected) but it would have to wait 'til tomorrow.

Cheers -- Dean

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