[PATCH] [RFC] Compiler-RT on ARM via CMake

[Alexey Samsonov]

On Thu, Jan 30, 2014 at 5:13 PM, Renato Golin <renato.golin at linaro.org>wrote:

> On 30 January 2014 12:49, Alexey Samsonov <samsonov at google.com> wrote:
>
>> Did you actually upload the new version? I don't see it in Phab.
>>
>
> No, I'm still playing with the options, and the main change is in Clang,
> so not relevant to this RT phab review. Attached is the Clang patch.
>
>
>   The message about detect_leaks is irrelevant here, it's just a warning.
>> However, we should probably turn on leak checking in ASan unit tests only
>> on supported platforms to reduce noise. See
>> compiler-rt/lib/asan/lit_tests/Unit/lit.site.cfg.in. However, you may
>> not bother about it at the moment.
>>
>
> Right, I'll try and disable just the leak check, something like:
>
> if config.host_os == 'Linux' and config.arch == 'x86_64':
>   config.environment['ASAN_OPTIONS'] = 'detect_leaks=1'
>
> Right now, I'm building the whole thing, will take a while.
>
> I found it hard to build just the unit tests. Even if I delete the test
> binary, or the objects, and "make check-asan", it doesn't rebuild the unit
> test (but it does run it). Maybe something wrong with the cmake files?
>

Weird, I didn't observe such problems.


>
>
>   Can you invoke the test cases directly (run the unit test binary with
>> specifying --gtest_filter=AddressSanitizer.ThreadedMallocStressTest) and
>> see what the problem is? These tests have substantial memory requirements,
>> so maybe there's just not enough RAM on your machine. I think we have
>> ASAN_LOW_MEMORY in ASan runtime compile definition for that.
>>
>
> I noticed that they segfault right after printing the message, so the
> message is probably a red herring. I will run them in debug mode.
>

I'd start with running the tests in gdb and fetching segfault stacktrace.
Debug mode (of your build tree) may not necessarily help, as we build unit
tests with just-built Clang, and with -O2. We also build sanitizer runtimes
with -O3, unless you specify -DCOMPILER_RT_DEBUG=ON.


>
> cheers,
> --renato
>
>


-- 
Alexey Samsonov, MSK
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20140130/19955d61/attachment.html>