[lldb-dev] LLDB test executable architectures

[Matthew Gardiner]

Just recently I figured out how to successfully run dotest.py on a 
64-bit linux. I ran it from the command line as follows:

$ my-lldb-source-directory/test >
LD_LIBRARY_PATH=/my-build-directory/lib/
PYTHONPATH=/my-build-directory/lib/python2.7/site-packages/
python dotest.py --executable=/my-build-directorybin/lldb -v --compiler=gcc -q .

The above incarnation took some time to figure out!

I guess what I'm saying is if dotest.py is changed in such a way that it 
needs to be run using another tool, and/or if the -arch setting must be 
passed in, then this should be documented *within* dotest.py itself.


Zachary Turner wrote:
> Well I guess it would be helpful to know how you run the tests.  Do 
> you run dotest.py from the command line?  Or do you have a tool that 
> drives the script?  Because if it's the latter, then the tool can just 
> pass in whatever architectures it wants.  I have a patch to the CMake 
> build right now that makes the CMake build always pass in the target 
> architectures.  So that will remove the need for this logic for anyone 
> running tests via CMake.  But I'm not sure what you do on Mac.
>
> I guess what I'm saying is that complicated logic is fine if it's 
> useful.  I just don't know if it's useful (maybe it is, but I don't 
> know what the workflow is like on Mac).  If you guys are already 
> running all the tests via a tool that passes in --arch on the command 
> line, or if you're willing to change whatever tool you do use (the 
> Xcode project?) to pass in --arch, then the logic here probably isn't 
> that useful.
>
>
> On Wed, Jul 30, 2014 at 6:58 PM, Greg Clayton <gclayton at apple.com 
> <mailto:gclayton at apple.com>> wrote:
>
>     If the logic is broken, please fix, but don't remove or simplify
>     it just because it is complex. Make sure that if a platform (like
>     darwin) supports both x86_64 and i386 binaries, that the tests run
>     for both so we cover all bases and know if something fails for 32
>     or 64 bit. Sounds like on Windows you only want to run x86_64 for
>     64 bit machines or i386 for 32 bit machine right?
>
>     Just make sure Darwin runs both with what ever fix you make.
>
>     > On Jul 29, 2014, at 4:22 PM, Zachary Turner <zturner at google.com
>     <mailto:zturner at google.com>> wrote:
>     >
>     > Currently dotest.py contains the following logic to determine
>     what architectures to compile the test executables as:
>     >
>     >     if args.archs:
>     >         # architectures were specified on the command line, just
>     use them
>     >     else:
>     >         if (platform_system == 'Darwin' or (platform_system ==
>     'Linux' and compilers == ['clang'])) and platform_machine == 'x86_64':
>     >             archs = ['x86_64', 'i386']
>     >         else:
>     >             archs = [platform_machine]
>     >
>     > Does anyone actually need this kind of complicated logic?  It's
>     kind of magical and hand-wavy.  There's no indication of why it
>     makes sense that Darwin+x64 system would default to running both
>     x64 and x86 tests, or why linux gcc x64 would run only x64 tests
>     but not x86 tests, even though linux clang x64 would run both sets
>     of tests.
>     >
>     > I'd like to simplify it if possible (partly because this logic
>     is actually broken on Windows, so I need to revisit it anyway).
>      Is there any reason we can't just keep it as simple as "If it's
>     on the command line, use it, otherwise default to running only the
>     tests corresponding to the system platform?"
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