[cfe-users] Code locations from the Memory Sanitizer

[Evgenii Stepanov via cfe-users]

For MSan, you'll need MSAN_SYMBOLIZER_PATH. Or just add to PATH, it
would work for all sanitizers.

On Fri, Apr 28, 2017 at 3:30 AM, Rainer Gerhards via cfe-users
<cfe-users at lists.llvm.org> wrote:
> 2017-04-28 12:25 GMT+02:00 Erik de Castro Lopo via cfe-users
> <cfe-users at lists.llvm.org>:
>> Hi all,
>>
>> I've tried Clang versions 3.6, 3.9 and 5.0 (all installed from Debian
>> packages on a Debian x86_64 machine), but I still can't get Memory
>> Sanitizer to give me the error file and line number locations.
>>
>> The project is
>>
>>    http://github.com/erikd/libsndfile
>>
>> and I'm configuring/building it with eg:
>>
>>     CC=clang-5.0
>>     CXX=clang++-5.0
>>     CFLAGS="-fsanitize=memory -fno-omit-frame-pointer -g -Wno-expansion-to-defined"
>>     CXXFLAGS=$CFLAGS
>>     ./configure --enable-werror --disable-shared
>>     make clean all check
>>
>> and I get:
>>
>>     broadcast_test                 : broadcast.rf64 ..........
>>     Uninitialized bytes in __interceptor_write at offset 36 inside [0x710000000000, 104)
>>     ==15113==WARNING: MemorySanitizer: use-of-uninitialized-value
>>     #0 0x67802e  (/home/erik/Git/libsndfile/tests/command_test+0x67802e)
>>     #1 0x600404  (/home/erik/Git/libsndfile/tests/command_test+0x600404)
>>     #2 0x5f72f6  (/home/erik/Git/libsndfile/tests/command_test+0x5f72f6)
>>     #3 0x4be48b  (/home/erik/Git/libsndfile/tests/command_test+0x4be48b)
>>     #4 0x4c06d6  (/home/erik/Git/libsndfile/tests/command_test+0x4c06d6)
>>     #5 0x4b1cfc  (/home/erik/Git/libsndfile/tests/command_test+0x4b1cfc)
>>     #6 0x4a10c6  (/home/erik/Git/libsndfile/tests/command_test+0x4a10c6)
>>     #7 0x495dbf  (/home/erik/Git/libsndfile/tests/command_test+0x495dbf)
>>     #8 0x7f3f37cf22b0  (/lib/x86_64-linux-gnu/libc.so.6+0x202b0)
>>     #9 0x41ef79  (/home/erik/Git/libsndfile/tests/command_test+0x41ef79)
>>
>> I expected to get file and line number position as shown in the documentation.
>>
>> Clues?
>
> I often need to set the ASAN_SYMBOLIZER_PATH:
>
> https://clang.llvm.org/docs/AddressSanitizer.html#id4
>
> It often tends to be wrong by package default...
>
> HTH
> Rainer
>
>>
>> Erik
>> --
>> ----------------------------------------------------------------------
>> Erik de Castro Lopo
>> http://www.mega-nerd.com/
>> _______________________________________________
>> cfe-users mailing list
>> cfe-users at lists.llvm.org
>> http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-users
> _______________________________________________
> cfe-users mailing list
> cfe-users at lists.llvm.org
> http://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-users