[llvm-dev] Broken LIT tests on Sanitizer Builds

[Ellis Hoag via llvm-dev]

Yeah it seems I was using gcc so I can try again with clang. Thanks!

On Mon, Nov 15, 2021 at 10:13 AM Vitaly Buka <vitalybuka at google.com> wrote:

> This one runs with Asan https://lab.llvm.org/buildbot/#/builders/168 and
> does check-llvm
> However we don't set -DBUILD_SHARED_LIBS=On
>
> On Mon, 15 Nov 2021 at 10:11, Mitch Phillips <mitchp at google.com> wrote:
>
>> Hi Ellis,
>>
>> Are you building using GCC as the host compiler? I can't say that
>> building clang with gcc-ASan is a well tested (or well-supported)
>> configuration.
>>
>> We do have ASan buildbots that run check-all, but the host compiler is
>> clang:
>> https://lab.llvm.org/buildbot/#/builders/168/builds/3354/steps/12/logs/stdio
>>
>> Thanks,
>> Mitch.
>>
>> On Mon, Nov 15, 2021 at 10:08 AM Ellis Hoag via llvm-dev <
>> llvm-dev at lists.llvm.org> wrote:
>>
>>> I recently built with -DLLVM_USE_SANITIZER=Address, ran the LIT tests,
>>> and noticed we have at least two tests with memory bugs on main. Here are
>>> the commands I ran
>>>
>>>
>>> $ cmake -GNinja -DLLVM_ENABLE_PROJECTS="clang;"
>>> -DCMAKE_BUILD_TYPE=RelWithDebInfo -DLLVM_ENABLE_ASSERTIONS=On
>>> -DBUILD_SHARED_LIBS=On -DLLVM_USE_SANITIZER=Address ../llvm
>>> $ ninja check-llvm
>>> ...
>>> ==2157126==ERROR: AddressSanitizer: global-buffer-overflow on address
>>> 0x7fb9f778c55f at pc 0x7fba0487419d bp 0x7ffe92a0a230 sp 0x7ffe92a099d8
>>> READ of size 1 at 0x7fb9f778c55f thread T0
>>>     #0 0x7fba0487419c  (/lib64/libasan.so.5+0xad19c)
>>>     #1 0x7fb9e7bcc439 in llvm::StringRef::strLen(char const*)
>>> /home/ellishoag/local/repos/llvm-project/llvm/include/llvm/ADT/StringRef.h:86
>>>     #2 0x7fb9e7bcc439 in llvm::StringRef::StringRef(char const*)
>>> /home/ellishoag/local/repos/llvm-project/llvm/include/llvm/ADT/StringRef.h:108
>>>     #3 0x7fb9e7bcc439 in getMnemonic
>>> /home/ellishoag/local/repos/llvm-project/llvm/lib/MC/MCAsmStreamer.cpp:159
>>> ...
>>> Failed Tests (2):
>>>   LLVM :: CodeGen/AArch64/machine-outliner-remarks.ll
>>>   LLVM :: CodeGen/X86/x86-shrink-wrapping.ll
>>>
>>>
>>> I think check-clang also has some broken tests. Should we be running
>>> these checks in https://lab.llvm.org/buildbot/ ? I'm not super familiar
>>> with this site, but it seems that we have asan builds, but that we don't
>>> run check-llvm or check-clang.
>>> _______________________________________________
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>>> llvm-dev at lists.llvm.org
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>>>
>>
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