[cfe-dev] leaks in clang (many!)

[Nico Weber]

Do you have a bot that provides an up-to-date list of these reports?
r207031 probably fixes many of the convertCommentToXML stacks.


On Wed, Apr 23, 2014 at 6:25 AM, Kostya Serebryany <kcc at google.com> wrote:

> Manuel mentions that clang has some intentional leaks.
> That's right, and we handle them using BuryPointer
> (./lib/Frontend/CompilerInvocation.cpp).
> So if there are more *intentional* leaks we need to bury them too to let
> LSan find the interesting ones.
>
> --kcc
>
>
> On Wed, Apr 23, 2014 at 4:25 PM, Kostya Serebryany <kcc at google.com> wrote:
>
>> Hi,
>>
>> TL;DR: there are tons of leaks in Clang, please help us fix them.
>>
>> We have a build bot<http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux-bootstrap> that
>> runs clang bootstrap under AddressSanitizer<http://clang.llvm.org/docs/AddressSanitizer.html>
>>  (ASan).
>> LeakSanitizer <http://clang.llvm.org/docs/LeakSanitizer.html> (LSan, a
>> leak detector that runs as part of ASan) is enabled on that bot,
>> but as we've learned today only on part of the bootstrap actually runs
>> LSan.
>> LSan is enabled by the env. var ASAN_OPTIONS=detect_leaks=1 and we have
>> this env. var. set on the bot so the 3-rd stage build uses it.
>> However the lit runner clears the environment and the lit
>> tests were not running under lsan until today, when I tried to enable
>> lsan by default.
>>
>> This has discovered tons of leaks and I reverted the change.
>> The leaks happen in various modes that are not exercised during regular
>> self-compilation on linux,
>> e.g. static analyzer, -emit-llvm, Windows ABI, etc.
>> I've filed a few bugs (19520 19522 19523 19524) but there are dozens more
>> reports left.
>>
>> If you care about leaks in clang, please check
>> http://llvm.org/bugs/attachment.cgi?id=12423
>> and see if any of these leaks are in your code.
>>
>> Thanks,
>>
>> --kcc
>>
>
>
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