Re: [PATCH] perf symbol: Fail to read phdr workaround

[Leo Yan]

Hi Arnaldo, Ian,

On Mon, Aug 01, 2022 at 09:38:23AM -0300, Arnaldo Carvalho de Melo wrote:

[...]

> I also think we could have something like a 'perf test' mode where, when
> asked to, it would enable tests that involve downloading such files to
> perform tests, such as this dacapo benchmark, and then would test if the
> output matches expectations.

I am working on testing script for java symbols, one of the steps shared by
Ian is:

  # /tmp/perf/perf record -k 1 java -agentpath:/tmp/perf/libperf-jvmti.so \
    -jar dacapo-9.12-MR1-bach.jar -n 10 fop

The question is how we can specify the path for the lib
libperf-jvmti.so in the testing script?

If we can run the test case from the root folder of Linux kernel
source code, the lib libperf-jvmti.so can be found in the folder
$linux/tools/perf, but for the integration testing the lib should be
placed in an installed folder.  Any suggestion if we have exited
way to specify the path for libperf-jvmti.so, or need to introduce a
new shell envorinment variable for the lib path?

Thanks,
Leo