[LLVMdev] QEMU testing for LIT execution tests

[Greg Fitzgerald]

Hi Jon,

+1 on adding support to run cross-compiled libcxx tests.  +Marshall

To add cross-compilation support to the compiler-rt test suite, I
added '%run' variable to the 'RUN:' lines in each lit test.  For
example:

https://github.com/llvm-mirror/compiler-rt/blob/master/test/asan/TestCases/atexit_stats.cc


and substituted '%run' with 'config.emulator' in the lit configuration file:

https://github.com/llvm-mirror/compiler-rt/blob/master/test/lit.common.cfg


which is set via CMake option COMPILER_RT_EMULATOR:

https://github.com/llvm-mirror/compiler-rt/blob/master/test/lit.common.configured.in


To configure the build to use QEMU (or adb, scp, etc):

$ cmake -DCOMPILER_RT_EMULATOR=qemu-aarch64

If you need additional parameters, you can either add them to the
COMPILER_RT_EMULATOR string or add a wrapper shell script.


To ensure new tests include '%run', I added the script 'litlint.py'
and invoke it within the CMake build:

https://github.com/llvm-mirror/compiler-rt/blob/master/lib/sanitizer_common/scripts/litlint.py


Let me know if you have any questions.  Feel free to include me on
Phabricator reviews.

-Greg


On Fri, Aug 22, 2014 at 7:30 AM, Renato Golin <renato.golin at linaro.org> wrote:
> On 22 August 2014 01:48, Jim Grosbach <grosbach at apple.com> wrote:
>> No specific comments at the moment, but I do want to say that I very much believe this is worth pursuing. Better testing infrastructure for remote targets will be an absolutely fantastic improvement. Thank you and Dan both for pushing forward on the topic.
>
> +1
>
> I remember Greg  (cc'd) did some of that in compiler-rt (or was it
> sanitizers?). He's not active in LLVM any more, but maybe you guys
> could share some thoughts.
>
> cheers,
> --renato